13A-DIAGNOSTIC FUNCTION

DIAGNOSTIC FUNCTION

MALFUNCTION INDICATOR LAMP (SERVICE ENGINE SOON OR CHECK ENGINE LAMP)

Among the on-board diagnostic items, Malfunction Indicator Lamp (SERVICE ENGINE SOON or Check Engine Lamp) illuminates or blinks to notify the driver of an emission control malfunction.

However, when an irregular signal returns to normal and the engine control module judges that it has returned to normal, the Malfunction Indicator Lamp (SERVICE ENGINE SOON or Check Engine Lamp) will switch off.

When the ignition switch is in the ON position, the indicator lamp should be illuminated. When the engine starts, the indicator lamp should be extinguished.

note	When the Transaxle Control Module (TCM) detects malfunctions related to the CVT, the Malfunction indicator Lamp (SERVICE ENGINE SOON or Check Engine Lamp) is also illuminated.

Items Indicated by the Malfunction Indicator Lamp (SERVICE ENGINE SOON or Check Engine Lamp)

DTC	ITEM
P0010	Engine oil control valve circuit
P0011	Variable valve timing system target error
P0016	Crankshaft/camshaft position sensor phase problem
P0031	Linear air-fuel ratio sensor heater control circuit low
P0032	Linear air-fuel ratio sensor heater control circuit high
P0037	Heated oxygen sensor (rear) heater control circuit low
P0038	Heated oxygen sensor (rear) heater control circuit high
P0053	Linear air-fuel ratio sensor heater resistance
P0068^*1	Mass airflow sensor plausibility
P0069	Abnormal correlation between manifold absolute pressure sensor and barometric pressure sensor
P0102^*1	Mass airflow circuit low input
P0103^*1	Mass airflow circuit high input
P0106	Manifold absolute pressure circuit range/performance problem
P0107	Manifold absolute pressure circuit low input
P0108	Manifold absolute pressure circuit high input
P0111^*1	Intake air temperature circuit range/performance problem
P0112^*1	Intake air temperature circuit low input
P0113^*1	Intake air temperature circuit high input
P0116^*1	Engine coolant temperature circuit range/performance problem
P0117^*1	Engine coolant temperature circuit low input
P0118^*1	Engine coolant temperature circuit high input
P0121^*1	Throttle position sensor (main) plausibility
P0122^*1	Throttle position sensor (main) circuit low input
P0123^*1	Throttle position sensor (main) circuit high input
P0125^*1	Insufficient coolant temperature for closed loop fuel control
P0128	Coolant thermostat (coolant temperature below thermostat regulating temperature)
P0130	Linear air-fuel ratio sensor circuit
P0131	Linear air-fuel ratio sensor circuit low voltage
P0132	Linear air-fuel ratio sensor circuit high voltage
P0133	Linear air-fuel ratio sensor circuit slow response
P0134	Linear air-fuel ratio sensor circuit no activity detected
P0137	Heated oxygen sensor (rear) circuit low voltage
P0138	Heated oxygen sensor (rear) circuit high voltage
P0139	Heated oxygen sensor (rear) circuit slow response
P0140	Heated oxygen sensor (rear) circuit no activity detected
P0171	System too lean
P0172	System too rich
P0181	Fuel tank temperature sensor circuit range/performance
P0182	Fuel tank temperature sensor circuit low input
P0183	Fuel tank temperature sensor circuit high input
P0221^*1	Throttle position sensor (sub) plausibility
P0222^*1	Throttle position sensor (sub) circuit low input
P0223^*1	Throttle position sensor (sub) circuit high input
P0261	Injector circuit low input - cylinder 1
P0262	Injector circuit high input - cylinder 1
P0264	Injector circuit low input - cylinder 2
P0265	Injector circuit high input - cylinder 2
P0267	Injector circuit low input - cylinder 3
P0268	Injector circuit high input - cylinder 3
P0300^*2	Random/multiple cylinder misfire detected
P0301^*2	Cylinder 1 misfire detected
P0302^*2	Cylinder 2 misfire detected
P0303^*2	Cylinder 3 misfire detected
P0327	Knock sensor circuit low
P0328	Knock sensor circuit high
P0335^*1	Crankshaft position sensor circuit
P0340^*1	Camshaft position sensor circuit
P0421	Warm up catalyst efficiency below threshold
P0441	Evaporative emission control system incorrect purge flow
P0442	Evaporative emission control system leak detected (small leak)
P0450	Evaporative emission control system pressure sensor malfunction
P0451	Evaporative emission control system pressure sensor range/performance
P0452	Evaporative emission control system pressure sensor low input
P0453	Evaporative emission control system pressure sensor high input
P0455	Evaporative emission control system leak detected (gross leak)
P0456	Evaporative emission control system leak detected (very small leak)
P0458	Evaporative emission control system purge control valve circuit low input
P0459	Evaporative emission control system purge control valve circuit high input
P0461	Fuel level sensor circuit range/performance
P0462	Fuel level sensor circuit low input
P0463	Fuel level sensor circuit high input
P0498	Evaporative emission control system canister vent solenoid circuit low input
P0499	Evaporative emission control system canister vent solenoid circuit high input
P0500^*1	Vehicle speed sensor malfunction <M/T>
P0506	Idle control system RPM lower than expected
P0507	Idle control system RPM higher than expected
P0602^*1	Control module programming error
P0606^*1	Engine control module main processor malfunction
P060B^*1	Internal control module A/D processing performance problem
P060D^*1	Internal control module accelerator pedal position performance problem
P061A^*1	Internal control module torque performance problem
P061C^*1	Internal control module engine RPM performance problem
P062F^*1	Internal control module EEPROM error
P0630^*1	Vehicle Identification Number (VIN) malfunction
P0638^*1	Throttle actuator control motor circuit range/ performance
P0642^*1	Throttle position sensor power supply
P0657^*1	Throttle actuator control motor relay circuit malfunction
P1238^*1	Mass airflow sensor plausibility (torque monitor)
P1506	Idle control system RPM lower than expected at low temperature
P1507	Idle control system RPM higher than expected at low temperature
P1590^*1	TCM to ECM communication error in torque reduction request <CVT>
P1603^*1	Battery backup circuit malfunction
P2096	Post catalyst fuel trim system too lean
P2097	Post catalyst fuel trim system too rich
P2100^*1	Throttle actuator control motor circuit (open)
P2101^*1	Throttle actuator control motor magneto malfunction
P2122^*1	Accelerator pedal position sensor (main) circuit low input
P2123^*1	Accelerator pedal position sensor (main) circuit high input
P2127^*1	Accelerator pedal position sensor (sub) circuit low input
P2128^*1	Accelerator pedal position sensor (sub) circuit high input
P2135^*1	Throttle position sensor (main and sub) range/performance problem
P2138^*1	Accelerator pedal position sensor (main and sub) range/performance problem
P2228^*1	Barometric pressure circuit low input
P2229^*1	Barometric pressure circuit high input
P2237	Linear air-fuel ratio sensor positive current control circuit/open
P2243	Linear air-fuel ratio sensor reference voltage circuit/open
P2251	Linear air-fuel ratio sensor negative current control circuit/open
P2252	Heated oxygen sensor offset circuit low voltage
P2253	Heated oxygen sensor offset circuit high voltage
U0101^*1	TCM time-out <CVT>
U0121	ASC-ECU time-out <M/T>
U0155^*1	Combination meter time-out

note

If the Malfunction Indicator Lamp (SERVICE ENGINE SOON or Check Engine Lamp) illuminates because of a malfunction of the engine control module (ECM), communication between the scan tool MB991958 (M.U.T.-III sub assembly) and the ECM is impossible. In this case, the diagnostic trouble code cannot be read.

note

After the ECM has detected a malfunction, the Malfunction Indicator Lamp (SERVICE ENGINE SOON or Check Engine Lamp) illuminates when the engine is next turned on and the same malfunction is re-detected. However, for items marked with a "*1" in the DTC NO. column, the Malfunction Indicator Lamp (SERVICE ENGINE SOON or Check Engine Lamp) illuminates only on the first detection of the malfunction.

note	The codes marked with a "*2" in the diagnostic trouble code number column have the following two conditions for illuminating the Malfunction Indicator Lamp (SERVICE ENGINE SOON or Check Engine Lamp).

In case that the misfire causing the damaged catalyst is detected, the Malfunction Indicator Lamp (SERVICE ENGINE SOON or Check Engine Lamp) will flash until the condition is corrected. If the system detects the same malfunction after the next engine start, and then the condition is corrected, the Malfunction Indicator Lamp (SERVICE ENGINE SOON or Check Engine Lamp) will illuminate.
In case that the misfire deteriorating the exhaust gas is detected, the Malfunction Indicator Lamp (SERVICE ENGINE SOON or Check Engine Lamp) is illuminated when the same malfunction is redetected after the next engine start.

note

Even if the malfunction is not detected when the ECM monitors the malfunction three consecutive times* after the Malfunction Indicator Lamp (SERVICE ENGINE SOON or Check Engine Lamp) illuminates, turn off the Malfunction Indicator Lamp (SERVICE ENGINE SOON or Check Engine Lamp) when the engine starts next time.

*: In this case, "one time" in monitoring the malfunction means the period from the time of the current engine start to the time of the next engine start. "One time" in monitoring the misfire or the fuel system malfunction means the time when the operating conditions (such as the engine speed or the engine coolant temperature) becomes similar operating conditions of the first detected malfunction.

HOW TO CONNECT THE SCAN TOOL (M.U.T.-III)

Required Special Tools:

MB992744: Vehicle communication interface-Lite (V.C.I.-Lite)
MB992745: V.C.I.-Lite main harness A
MB992747: V.C.I.-Lite USB cable short
MB992748: V.C.I.-Lite USB cable long
MB991958: Scan Tool (M.U.T.-III Sub Assembly)

MB991824: Vehicles Communication Interface (V.C.I.)
MB991827: M.U.T.-III USB Cable
MB991910: M.U.T.-III Main Harness A (Vehicles with CAN communication system)

caution

To prevent damage to scan tool (M.U.T.-III), always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool (M.U.T.-III).

1. Ensure that the ignition switch is at the "LOCK" (OFF) position.

2. Start up the personal computer.

3. Connect special tool MB992747/M992748 or special tool MB991827 to special tool MB992744 or special tool MB991824 and the personal computer.

4. Connect special tool MB992745 or special tool MB991910 to special tool MB992744 or special tool MB991824.

5. Connect special tool MB992745 or special tool MB991910 to the data link connector.

note	When the special tool MB992745 is connected to the data link connector, the special tool MB992744 indicator light will be illuminated in a green color.

6. Turn the power switch of special tool MB991824 to the "ON" position. <When using the special tool MB991824>

note	When special tool MB991824 is energized, special tool MB991824 indicator light will be illuminated in a green color.

7. Start the M.U.T.-III system on the personal computer.

note	Disconnecting scan tool (M.U.T.-III) is the reverse of the connecting sequence, making sure that the ignition switch is at the "LOCK" (OFF) position.

HOW TO READ AND ERASE DIAGNOSTIC TROUBLE CODES.

Required Special Tools:

MB992744: Vehicle communication interface-Lite (V.C.I.-Lite)
MB992745: V.C.I.-Lite main harness A
MB992747: V.C.I.-Lite USB cable short
MB992748: V.C.I.-Lite USB cable long
MB991958: Scan Tool (M.U.T.-III Sub Assembly)

MB991824: Vehicles Communication Interface (V.C.I.)
MB991827: M.U.T.-III USB Cable
MB991910: M.U.T.-III Main Harness A (Vehicles with CAN communication system)

caution

To prevent damage to scan tool (M.U.T.-III), always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool (M.U.T.-III).

1. Connect scan tool (M.U.T.-III) to the data link connector.

2. Turn the ignition switch to the "ON" position.

3. Select "System select."

4. Choose "from 2006 MY" under "MODEL YEAR".

5. Check that "Vehicle Information" contents are correct.

6. Choose "MFI".

7. Select "Diagnostic Trouble Code"

8. If a DTC is stored, it is shown.

9. Choose "Erase DTCs" to erase the DTC.

HOW TO READ DATA LIST

Required Special Tools:

MB992744: Vehicle communication interface-Lite (V.C.I.-Lite)
MB992745: V.C.I.-Lite main harness A
MB992747: V.C.I.-Lite USB cable short
MB992748: V.C.I.-Lite USB cable long
MB991958: Scan Tool (M.U.T.-III Sub Assembly)

MB991824: Vehicles Communication Interface (V.C.I.)
MB991827: M.U.T.-III USB Cable
MB991910: M.U.T.-III Main Harness A (Vehicles with CAN communication system)

caution

To prevent damage to scan tool (M.U.T.-III), always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool (M.U.T.-III).

1. Connect scan tool (M.U.T.-III) to the data link connector.

2. Turn the ignition switch to the "ON" position.

3. Select "System select."

4. Choose "from 2006 MY" under "MODEL YEAR".

5. Check that "Vehicle Information" contents are correct.

6. Choose "MFI".

7. Select "Data List."

8. Choose an appropriate item and select the "OK" button.

HOW TO PERFORM ACTUATOR TEST

Required Special Tools:

MB992744: Vehicle communication interface-Lite (V.C.I.-Lite)
MB992745: V.C.I.-Lite main harness A
MB992747: V.C.I.-Lite USB cable short
MB992748: V.C.I.-Lite USB cable long
MB991958: Scan Tool (M.U.T.-III Sub Assembly)

MB991824: Vehicles Communication Interface (V.C.I.)
MB991827: M.U.T.-III USB Cable
MB991910: M.U.T.-III Main Harness A (Vehicles with CAN communication system)

caution

To prevent damage to scan tool (M.U.T.-III), always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool (M.U.T.-III).

1. Connect scan tool (M.U.T.-III) to the data link connector.

2. Turn the ignition switch to the "ON" position.

3. Select "System select."

4. Choose "from 2006 MY" under "MODEL YEAR".

5. Check that "Vehicle Information" contents are correct.

6. Choose "MFI".

7. Select "Actuator Test."

8. Choose an appropriate item and select the "OK" button.

HOW TO DIAGNOSE THE CAN BUS LINES

Required Special Tools:

MB992744: Vehicle communication interface-Lite (V.C.I.-Lite)
MB992745: V.C.I.-Lite main harness A
MB992747: V.C.I.-Lite USB cable short
MB992748: V.C.I.-Lite USB cable long
MB991958: Scan Tool (M.U.T.-III Sub Assembly)

MB991824: Vehicles Communication Interface (V.C.I.)
MB991827: M.U.T.-III USB Cable
MB991910: M.U.T.-III Main Harness A (Vehicles with CAN communication system)

caution

To prevent damage to scan tool (M.U.T.-III), always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool (M.U.T.-III).

1. Connect scan tool (M.U.T.-III) to the data link connector.

2. Turn the ignition switch to the "ON" position.

3. Select "CAN bus diagnosis" from the start-up screen.

4. When the vehicle information is displayed, confirm that it matches the vehicle whose CAN bus lines will be diagnosed.

If they matches, go to Step 8.
If not, go to Step 5.

5. Select the "view vehicle information" button.

6. Enter the vehicle information and select the "OK" button.

7. When the vehicle information is displayed, confirm again that it matches the vehicle whose CAN bus lines will be diagnosed.

If they matches, go to Step 8.
If not, go to Step 5.

8. Select the "OK" button.

9. When the optional equipment screen is displayed, choose the one which the vehicle is fitted with, and then select the "OK" button.

HOW TO READ PROVISIONAL DIAGNOSTIC TROUBLE CODES

Required Special Tools:

MB992744: Vehicle communication interface-Lite (V.C.I.-Lite)
MB992745: V.C.I.-Lite main harness A
MB992747: V.C.I.-Lite USB cable short
MB992748: V.C.I.-Lite USB cable long
MB991958: Scan Tool (M.U.T.-III Sub Assembly)

MB991824: Vehicles Communication Interface (V.C.I.)
MB991827: M.U.T.-III USB Cable
MB991910: M.U.T.-III Main Harness A (Vehicles with CAN communication system)

If detecting the malfunction during the first drive cycle, the ECM temporarily stores the diagnostic trouble code as the provisional diagnostic trouble code. If detecting the same malfunction during the next drive cycle, the ECM determines that the malfunction exists. The ECM outputs the diagnostic trouble code. On Scan Tool MB991958, it is possible to display the stored provisional diagnostic trouble code which the ECM had detected during the first drive cycle. This makes it possible to confirm in one drive cycle whether the malfunction could happen again after the repair.

CONFIRMATION METHOD

caution

To prevent damage to scan tool (M.U.T.-III), always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool (M.U.T.-III).

1. Connect scan tool (M.U.T.-III) to the data link connector.

2. Turn the ignition switch to the "ON" position.

3. Select "System select."

4. Choose "from 2006 MY" under "MODEL YEAR".

5. Check that "Vehicle Information" contents are correct.

6. Choose "MFI".

7. Select "Special Function" from MFI Screen.

8. Select "Provisional DTCs" from Special Function Screen.

PERMANENT DTC

The permanent DTC(PDTC) is stored in the EEPROM of the engine control module (ECM) as the permanent status, which checks that the malfunction of the emission related components/ the system has not been repaired yet. When detecting the malfunction necessary to illuminate the malfunction indicator lamp (SERVICE ENGINE SOON or Check Engine Lamp), the ECM illuminates the MIL and stores the appropriate DTC as the permanent DTC in the EEPROM concurrently. The usual DTC is stored in the EEPROM aside from this. The ECM can store up to 6 PDTCs. The ECM, therefore, cannot store the 7th and subsequent PDTCs. If the temporary malfunction causes the malfunction indicator lamp to be illuminated and then the reinstatement during the subsequent driving causes it to be extinguished, the PDTC is erased. Also if the ECM checks that the DTC malfunction is fixed during the driving after the DTC repair is completed, the PDTC is erased. The permanent DTC, however, is not erased by disconnecting the battery terminal or erasing with the scan tool (M.U.T-III). The permanent DTC can be erased if all readiness statuses are erased or not completed at the time of reprogramming the ECM. If must be erased while the vehicle is repaired, the PDTC can be erased by the procedures shown below. If must be erased because of the failure to pass the Inspection and Maintenance (I/M) test, the permanent DTC can also be erased by the following procedure:

PROCEDURES FOR ERASING PERMANENT DTC

1. Check that the DTC is not stored. If the DTC is stored, perform the DTC troubleshooting, then repair the DTC.

note	The order of Step 2 and 3 can be exchanged.

2. Drive the vehicle at least once under the conditions satisfying all the following requirements:

The total driving (engine running) time must be more than 10 consecutive minutes.
More than 30 seconds of idling must be included in the driving
More than 5 consecutive minutes of driving at more than 40 km/h (25 mph) must be included in the driving.

3. Drive the vehicle at least two times in the drive cycle pattern suitable for the permanent DTC. (Refer to OBD-II DRIVE CYCLE for the drive cycle pattern.) If the DTC does not have the drive cycle pattern, start and stop the engine. Wait 15 seconds or more to start again after the stop. Repeat at least 2 times.

4. Restart and stop the engine.

5. Check that the permanent DTC is erased. If the permanent DTC is not erased, check the DTC or the provisional DTC. If the malfunction code is stored, repair the DTC. Try to erase the permanent DTC again (from Step 1 to 5). If the malfunction code is not stored, the drive cycle pattern (Step 3) monitoring the malfunction can possibly be insufficient.

MODE 6 REFERENCE TABLE

The engine control module (ECM) monitors the condition of emission control system. By selecting MODE 6 using scan tool, Test Result and Limit Value (minimum) *1 or (maximum) *2 about the main items of emission control system which ECM monitors can be confirmed. The value at the last monitoring is output by ECM as a test result.

ON-BOARD DIAGNOSTIC MONITOR ID	STANDARDIZED / MANUFACTURER DEFIND TEST ID	MONITORING ITEM	SIMPLE TECHNICAL DESCRIPTION	CONVERSION COEFFICIENT IN USING GENERAL SCAN TOOL
01	81	A/F Sensor Monitor Bank 1 - Sensor 1 Rich/Lean Switching frequency	ECM monitors the deteriorated condition of the linear air-fuel ratio sensor by checking the rich/lean switching frequency of the linear air-fuel ratio sensor.	× 1 count
02	08	Oxygen Sensor Monitor Bank 1 - Sensor 2 Maximum Sensor Voltage for Test Cycle	ECM checks the output voltage of the heated oxygen sensor (rear) in order to monitor whether the heated oxygen sensor (rear) outputs the rich signal.	× 0.122mV
	82	Oxygen Sensor Monitor Bank 1 - Sensor 2 Output Voltage change	ECM checks the output voltage of the heated oxygen sensor (rear) in order to monitor whether the heated oxygen sensor (rear) output is stuck.	× 0.122 mV
	05	Oxygen Sensor Monitor Bank 1 - Sensor 2 Rich To Lean Sensor Switch Time	ECM checks the rich to lean switching time of the heated oxygen sensor (rear) in order to monitor the response of the heated oxygen sensor (rear).	× 1 msec
	88	Oxygen Sensor Monitor Bank 1 - Sensor 2 Output Voltage drop slope	ECM checks the output voltage drop slope of the heated oxygen sensor (rear) in order to monitor the response of the heated oxygen sensor (rear).	× 1 msec
21	83	Catalyst Monitor Bank 1 Frequency ratio between Front- and Rear-Oxygen Sensors	ECM monitors the deterioration of catalyst by the output frequency ratio between linear air-fuel ratio sensor and heated oxygen sensor (rear).	× 0.0039
35	89	VVT Monitor Bank 1 Cam Phase Angle Deviation (between target and actual position)	ECM monitors the deviation between the intake camshaft target phase angle and the intake camshaft actual phase angle.	× 0.01°
39	85	EVAP Monitor (Cap off) Pressure drop during de-pressurizing	ECM monitors the leak of fuel evaporation gas by checking whether the pressure can be reduced (the amount of pressure reduction) using the fuel tank differential pressure sensor after sealing the fuel tank and the fuel line.	× 0.0117 kPa
3B	85	EVAP Monitor (0.040") Pressure rise during airtight condition	After ECM vacuumizes the fuel tank and the fuel line and then the specified time is passed, ECM monitors the leak of fuel evaporation gas through the fuel tank differential pressure sensor to check the reduction of vacuum in the fuel tank.	× 0.0117 kPa
3C	85	EVAP Monitor (0.020") Pressure rise during airtight condition	After ECM vacuumizes the fuel tank and the fuel line and then the specified time is passed, ECM monitors the leak of fuel evaporation gas through the fuel tank differential pressure sensor to check the reduction of vacuum in the fuel tank.	× 0.0117 kPa
41	86	A/F Sensor Heater Monitor Bank1 - Sensor1 Heater Monitoring Current	ECM checks the amperage of the linear air-fuel ratio sensor heater.	× 0.001 A
A2	0B	Mis-Fire Cylinder 1 Data EWMA Misfire Counts For Last 10 Driving Cycles	ECM monitors angular acceleration of crankshaft and detect misfire. EWMA (Exponential Weighted Moving Average) misfire counts for last 10 driving cycles.	× 1 count
A2	0C	Mis-Fire Cylinder 1 Data Misfire Counts For Last/Current Driving Cycle	ECM monitors angular acceleration of crankshaft and detect misfire. Misfire counts for last/current driving cycle.	× 1 count
A3	0B	Mis-Fire Cylinder 2 Data EWMA Misfire Counts For Last 10 Driving Cycles	ECM monitors angular acceleration of crankshaft and detect misfire. EWMA (Exponential Weighted Moving Average) misfire counts for last 10 driving cycles.	× 1 count
A3	0C	Mis-Fire Cylinder 2 Data Misfire Counts For Last/Current Driving Cycle	ECM monitors angular acceleration of crankshaft and detect misfire. Misfire counts for last/current driving cycle.	× 1 count
A4	0B	Mis-Fire Cylinder 3 Data EWMA Misfire Counts For Last 10 Driving Cycles	ECM monitors angular acceleration of crankshaft and detect misfire. EWMA (Exponential Weighted Moving Average) misfire counts for last 10 driving cycles.	× 1 count
A4	0C	Mis-Fire Cylinder 3 Data Misfire Counts For Last/Current Driving Cycle	ECM monitors angular acceleration of crankshaft and detect misfire. Misfire counts for last/current driving cycle.	× 1 count

note	*1: Minimum value: The test fails if test value is less than this value.

note	*2: Maximum value: The test fails if test value is greater than this value.

note	When not finishing the monitor of the driving cycle for the request of On-Board Monitoring Test Request, the ECM outputs the stored latest monitor test result.

note

When the monitored test results are erased by the battery disconnection and so on, the ECM outputs the values in hexadecimal of "0000" or "FFFF", otherwise it outputs abnormal values and so on. In case of this, the ECU outputs are handled as invalid-values. When the first monitor (Readiness Status) is completed after this, the ECM outputs the valid-values.

note	"Test Limit Type & Component ID byte" output from the ECM is given in hexadecimal of "00" or "80". "00" means the maximum value and "80" means the minimum value.

ON-BOARD DIAGNOSTICS

The engine control module (ECM) monitors the input/output signals (some signals all the time and others under specified conditions) of the ECM. When a malfunction continues for a specified time or longer after the irregular signal is initially monitored, the ECM judges that a malfunction has occurred. After the ECM first detects a malfunction, a diagnostic trouble code is recorded when the engine is restarted and the same malfunction is re-detected. However, for items marked with a "*1", a diagnostic trouble code is recorded on the first detection of the malfunction. The diagnostic results can be read out with a scan tool. Since memorization of the diagnostic trouble codes is backed up directly by the battery, the diagnostic results are memorized even if the ignition key is turned off. The diagnostic trouble codes will, however, be erased when the battery terminal or the ECM connector is disconnected. In addition, the diagnostic trouble code can also be erased by turning the ignition switch to ON and sending the diagnostic trouble code erase signal from scan tool MB991958 to the ECM.

note

If the sensor connector is disconnected with the ignition switch turned on, the diagnostic trouble code is memorized. In this case, send the diagnostic trouble code erase signal to the ECM in order to erase the diagnostic memory. The ECM records the engine operating condition when the diagnostic trouble code is stored. This data is called "Freeze-frame" data. This data can be read by using the scan tool, and can then be used in simulation tests for troubleshooting. Data items are as follows:

note

If the ECM detects multiple malfunctions, the ECM stores the "Freeze-frame" data for only the first item that was detected. However, if the ECM detects a misfire or a fuel system malfunction, the ECM stores the data by giving priority to the misfire or fuel system malfunction, regardless of the order in which the malfunction was detected.

note	As for Diagnostic trouble code P1603, "Freeze-frame" data is not memorized.

Freeze Frame Data for M.U.T.-III

ITEM NO.	M.U.T.-III SCAN TOOL DISPLAY	DATA ITEM	UNIT or STATE
1	Odometer	Odometer	km or mile
2	Ignition cycle (Warm up cycle)	Ignition cycle (Warm up cycle)	-
4	Accumulated minute	Accumulated minute*	min

note	*: Accumulated time of current malfunction from time point when malfunction is detected.

Freeze Frame Data (OBD) for M.U.T.-III

ITEM NO.	M.U.T.-III SCAN TOOL DISPLAY	DATA ITEM	UNIT or STATE
AA	Airflow sensor	Mass airflow sensor	g/s
AB	TP sensor (main)	Throttle position sensor (main)	%
BB	Barometric pressure sensor	Barometric pressure sensor	kPa or in.Hg
BC	Relative TP sensor	Relative throttle position sensor	%
BD	TP sensor (sub)	Throttle position sensor (sub)	%
BE	APP sensor (main)	Accelerator pedal position sensor (main)	%
BF	APP sensor (sub)	Accelerator pedal position sensor (sub)	%
C0	Fuel system status (bank1)	Fuel control system status	Open loop
			Closed loop
			Open loop-drive condition
			Open loop-DTC set
			Closed loop-O2 (rear) failed
C1*	Fuel system status (bank 2)	Fuel control system status (bank 2)	N/A
C2	Calculated load value	Calculated load value	%
C3	ECT sensor	Engine coolant temperature sensor	°C or °F
C4	Short term fuel trim (bank 1)	Short-term fuel trim	%
C5*	Short term fuel trim (bank 3)	Short-term fuel trim (bank 3)	****
C6	Long term fuel trim (bank 1)	Long-term fuel trim	%
C7*	Long term fuel trim (bank 3)	Long-term fuel trim (bank 3)	****
CC	MAP sensor	Manifold absolute pressure sensor	kPa or in.Hg
CD	Crankshaft position sensor	Crankshaft position sensor	r/min
CE	Vehicle speed	Vehicle speed	km/h or mph
CF	Spark advance	Spark advance	°CA
D0	Intake air temperature sensor 1	Intake air temperature sensor	°C or °F
D1	Time since engine running	Time since engine running	sec
D6	EVAP. emission purge SOL. duty	Evaporative emission purge solenoid duty	%
D7	Fuel level gauge	Fuel level gauge	%
D8	Power supply voltage	Power supply voltage	V
D9	Absolute load value	Absolute load value	%
DA	Target equivalence ratio	Target equivalence ratio	-
DB	Intake air temperature sensor 1	Intake air temperature sensor (ambient air temperature)	°C or °F
DC	Throttle actuator	Throttle actuator control motor	%
DD	Relative APP sensor	Relative accelerator pedal position sensor	%
242	Fuel tank differential PRS.SNSR	Fuel tank differential pressure sensor	Pa

note	: Data items are displayed on scan tool display, but the in-line 4 engine is not applicable and its data is displayed as "N/A" or "***".

Freeze Frame Data for General Scan Tool

COMMON EXAMPLE of GENERAL SCAN TOOL DISPLAY	PRAMETER IDENTIFICATION (PID)	DESCRIPTION	UNIT or STATE
DTCFRZF	02	DTC that caused required freeze frame data storage	Pxxxx, Uxxxx
FUELSYS 1	03	See M.U.T.-III Item No. C0
LOAD_PCT	04	See M.U.T.-III Item No. C2
ECT	05	See M.U.T.-III Item No. C3
SHRTFT 1	06	See M.U.T.-III Item No. C4
LONGFT 1	07	See M.U.T.-III Item No. C6
MAP	0B	See M.U.T.-III Item No. CC
RPM	0C	See M.U.T.-III Item No. CD
VSS	0D	See M.U.T.-III Item No. CE
SPARKADV	0E	See M.U.T.-III Item No. CF
IAT	0F	See M.U.T.-III Item No. D0
MAF	10	See M.U.T.-III Item No. AA
TP	11	See M.U.T.-III Item No. AB
RUNTM	1F	See M.U.T.-III Item No. D1
EGR_PCT	2C	See M.U.T.-III Item No. BA
EVAP_PCT	2E	See M.U.T.-III Item No. D6
FLI	2F	See M.U.T.-III Item No. D7
EVAP_VP	32	See M.U.T.-III Item No. 242
BARO	33	See M.U.T.-III Item No. BB
VPWR	42	See M.U.T.-III Item No. D8
LOAD_ABS	43	See M.U.T.-III Item No. D9
EQ_RAT	44	See M.U.T.-III Item No. DA
TP_R	45	See M.U.T.-III Item No. BC
AAT	46	See M.U.T.-III Item No. DB
TP_B	47	See M.U.T.-III Item No. BD
APP_D	49	See M.U.T.-III Item No. BE
APP_E	4A	See M.U.T.-III Item No. BF
TAC_PCT	4C	See M.U.T.-III Item No. DC
APP_R	5A	See M.U.T.-III Item No. DD

OBD- II DRIVE CYCLE

All kinds of diagnostic trouble codes (DTCs) can be monitored by carrying out a short drive according to the following 22 drive cycle patterns. In other words, doing such a drive regenerates any kind of trouble which involves illuminating the Malfunction Indicator Lamp (SERVICE ENGINE SOON or Check Engine Lamp) and verifies the repair procedure has been eliminated [the trouble the Malfunction Indicator Lamp (SERVICE ENGINE SOON or Check Engine Lamp) is no longer illuminated].

caution

Two technicians should always be in the vehicle when carrying out a test.

note	Check that the diagnostic trouble code (DTC) is not output before driving the OBD-II drive cycle. Erase the DTC if it has been output.

note	Drive cycle patterns are not established for Vehicle speed sensor monitor (DTC P0500) and Fuel level sensor monitor (DTC P0461). Please reference the M.U.T. data list to judge whether these monitor items are normal.

DRIVE CYCLE PATTERN LIST

MONITOR ITEM	DIAGNOSTIC TROUBLE CODE (DTC)	PATTERN
Linear air-fuel ratio sensor monitor <Readiness test item>	P0133	1
Heated oxygen sensor (rear) feedback control system monitor	P2096, P2097	1
Linear air-fuel ratio sensor heater monitor <Readiness test item>	P0031	2
Heated oxygen sensor heater monitor <Readiness test item>	P0037
Linear air-fuel ratio sensor heater monitor	P0032
Heated oxygen sensor heater monitor	P0038
Catalytic converter monitor <Readiness test item>	P0421	3
Evaporative emission system leak monitor (small leak and gross leak) <Readiness test item>	P0442, P0455	4
Evaporative purge system monitor	P0441
Fuel tank pressure sensor monitor	P0450
Evaporative emission system leak monitor (very small leak) <Readiness test item>	P0456	5
Manifold absolute pressure (MAP) sensor monitor	P0106, P0107	6
Intake air temperature sensor monitor	P0111	7
Engine coolant temperature sensor monitor	P0116, P0125	8
Thermostat monitor	P0128	9
Heated oxygen sensor (rear) monitor <Readiness test item>	P0139	10
Air fuel ratio feedback monitor	-	11
Heated oxygen sensor (rear) monitor <Readiness test item>	P0140	12
Fuel tank temperature sensor monitor	P0181	13
Misfire monitor	P0300, P0301, P0302, P0303	14
Fuel tank pressure sensor monitor	P0451	15
Throttle position sensor plausibility monitor	P0121, P0221	16
Mass airflow sensor plausibility monitor	P0068, P1238
Torque monitor	P061A
Idle speed control system monitor	P0506, P0507	17
Idle speed control system monitor	P1506, P1507	18
Variable valve timing system (MIVEC) monitor	P0010, P0011, P0016	19
Fuel trim monitor	P0171, P0172	20
Linear air-fuel ratio sensor heater monitor <Readiness test item>	P0053	21
Heated oxygen sensor monitor	P0137
Linear air-fuel ratio sensor monitor	P0130, P0131, P0132, P0134, P2237, P2243, P2251
Mass airflow sensor monitor	P0102, P0103	22
Manifold absolute pressure (MAP) sensor monitor	P0108
Intake air temperature sensor monitor	P0112, P0113
Engine coolant temperature sensor monitor	P0117, P0118
Heated oxygen sensor monitor	P0138, P2252, P2253
Fuel tank temperature sensor monitor	P0182, P0183
Injector monitor	P0261, P0262, P0264, P0265, P0267, P0268
Knock sensor monitor	P0327, P0328
Crankshaft position sensor monitor	P0335
Camshaft position sensor monitor	P0340
Evaporative emission purge solenoid monitor	P0458, P0459
Evaporative emission ventilation solenoid monitor	P0498, P0499
Fuel tank pressure sensor monitor	P0452, P0453
Fuel level sensor monitor	P0462, P0463
Engine RPM plausibility monitor	P061C
Barometric pressure sensor monitor	P2228, P2229

PATTERN 1

Drive cycle pattern

Inspection conditions

Engine coolant temperature: More than 76°C (169°F)
Condition of CVT: Selector lever "D" range

Test procedure

Start the engine with all the accessories switched OFF.
Drive the vehicle for 4 minutes at the following conditions. (During the monitor)
note When the system is normal, the monitor is completed earlier.

Vehicle speed: More than 30 km/h (19 mph)
Engine speed: More than 2,000 r/min, less than 4,000 r/min <M/T>
Engine speed: More than 1,300 r/min, less than 3,000 r/min <CVT>
Engine load: More than 22 %, less than 65 %
Without rapid accelerator pedal movement

Stop the vehicle in a safe place and turn the ignition switch to "LOCK" (OFF) position.

Start the engine and do Steps 1 to 3 again.

note	When the vehicle is operating normally and the OBD-II Drive Cycle is carried out, the Readiness Codes will be set as "Complete" on the first drive cycle. The second drive cycle is required to set the Readiness Codes as "Complete" if a fault is detected during the first drive cycle.

Confirm that the diagnostic trouble code (DTC) is not output.

PATTERN 2

Test procedure

Start the engine with all the accessories switched OFF.
Let the engine idle for 10 seconds. (During the monitor)
Turn the ignition switch to the "LOCK" (OFF) position.

Start the engine and do Steps 1 to 3 again.

note	When the vehicle is operating normally and the OBD-II Drive Cycle is carried out, the Readiness Codes will be set as "Complete" on the first drive cycle. The second drive cycle is required to set the Readiness Codes as "Complete" if a fault is detected during the first drive cycle.

Confirm that the diagnostic trouble code (DTC) is not output.

PATTERN 3

Drive cycle pattern

Inspection conditions

Engine coolant temperature: More than 0°C (32°F)
Intake air temperature: More than -10°C (14°F)
Barometric pressure: More than 76 kPa (22.4 in.Hg)
Condition of CVT: Selector lever "D" range

Test procedure

Start the engine with all accessories switched OFF.
Drive the vehicle for 5 minutes at the following conditions. (During the monitor)

Engine speed: Less than 3,500 r/min
Airflow rate: More than 6 g/sec, less than 45 g/sec <M/T>
Airflow rate: More than 10 g/sec, less than 45 g/sec <CVT>
Accelerator pedal: Except full close
Without rapid accelerator pedal movement

Release the accelerator pedal for 5 seconds.
Drive the vehicle for 3 minutes at the following conditions. (During the monitor)

Engine speed: Less than 3,500 r/min
Airflow rate: More than 6 g/sec, less than 45 g/sec <M/T>
Airflow rate: More than 10 g/sec, less than 45 g/sec <CVT>
Accelerator pedal: Except full close
Without rapid accelerator pedal movement
note When the system is normal, the monitor is completed earlier.

Stop the vehicle in a safe place and turn the ignition switch to "LOCK" (OFF) position.

Start the engine and do Steps 1 to 5 again.

note	When the vehicle is operating normally and the OBD-II Drive Cycle is carried out, the Readiness Codes will be set as "Complete" on the first drive cycle. The second drive cycle is required to set the Readiness Codes as "Complete" if a fault is detected during the first drive cycle.

Confirm that the diagnostic trouble code (DTC) is not output.

PATTERN 4

Drive cycle pattern

Inspection conditions

Engine coolant temperature at engine start: Less than 36°C (96°F)
Intake air temperature at engine start: Less than 36°C (96°F)
Fuel amount at engine start: More than 15 %, less than 40 %
Engine coolant temperature: More than 60°C (140°F)
Intake air temperature: More than 5°C (41°F), less than 45°C (113°F)
Barometric pressure: More than 76 kPa (22.4 in.Hg)
Fuel temperature: Less than 36°C (97°F)
Condition of CVT: Selector lever "D" range

Test procedure

Start the engine with all the accessories switched OFF.
Drive the vehicle for 16 minutes at the following conditions. (During the monitor)

Engine speed: More than 1,600 r/min, less than 4,000 r/min
Vehicle speed: More than 20 km/h (12 mph)
Airflow rate: More than 12 g/sec
The ratio between the manifold absolute pressure and the barometric pressure is 0.85 or less.
Without rapid accelerator pedal movement
note Keep running as long as possible with the power steering pressure switch in the OFF position.
note When the system is normal, the monitor is completed earlier.

Stop the vehicle in a safe place and turn the ignition switch to "LOCK" (OFF) position.

Start the engine and do Steps 1 to 3 again.

note	When the vehicle is operating normally and the OBD-II Drive Cycle is carried out, the Readiness Codes will be set as "Complete" on the first drive cycle. The second drive cycle is required to set the Readiness Codes as "Complete" if a fault is detected during the first drive cycle.

Confirm that the diagnostic trouble code (DTC) is not output.

PATTERN 5

Inspection conditions

Engine coolant temperature at engine start: Less than 36°C (96°F)
Intake air temperature at engine start: Less than 36°C (96°F)
Fuel amount at engine start: More than 40 %, less than 85 %
Engine coolant temperature: More than 20°C (68°F)
Intake air temperature: More than -10°C (14°F)
Barometric pressure: More than 76 kPa (22.4 in.Hg)
Fuel temperature: Less than 33°C (91°F)

Test procedure

Start the engine with all the accessories switched OFF.
Let the engine idle for 16 minutes. (During the monitor)
note When the system is normal, the monitor is completed earlier.
Turn the ignition switch to "LOCK" (OFF) position.

Start the engine and do Steps 1 to 3 again.

note	When the vehicle is operating normally and the OBD-II Drive Cycle is carried out, the Readiness Codes will be set as "Complete" on the first drive cycle. The second drive cycle is required to set the Readiness Codes as "Complete" if a fault is detected during the first drive cycle.

Confirm that the diagnostic trouble code (DTC) is not output.

PATTERN 6

Drive cycle pattern
Inspection conditions	Engine coolant temperature at engine start: More than 0°C (32°F) Condition of CVT: Selector lever "D" range
Test procedure	Start the engine with all the accessories switched OFF. Let the engine idle for 30 seconds. (During the monitor) Accelerate the vehicle for 2 seconds at the following conditions. (During the monitor) Engine speed: More than 1,500 r/min Engine load: More than 20 % Throttle position sensor output voltage: More than 3.5 volts Stop the vehicle in a safe place and turn the ignition switch to "LOCK" (OFF) position. Start the engine and do Steps 1 to 4 again. Confirm that the diagnostic trouble code (DTC) is not output.

PATTERN 7

Drive cycle pattern
Inspection conditions	Engine coolant temperature: More than 76°C (169°F) Condition of CVT: Selector lever "D" range
Test procedure	Start the engine with all the accessories switched OFF. Drive the vehicle at more than 50 km/h (31 mph) for 1 minute. Stop the vehicle in a safe place and let the engine idle for 30 seconds. Repeat Steps 2 and 3 again. Stop the vehicle in a safe place and turn the ignition switch to "LOCK" (OFF) position. Confirm that the diagnostic trouble code (DTC) is not output.

PATTERN 8

Drive cycle pattern
Inspection conditions	Engine coolant temperature at engine start: More than 0°C (32°F) Intake air temperature: Less than 60°C (140°F) Engine coolant temperature: More than 40°C (104°F) Condition of CVT: Selector lever "D" range
Test procedure	Start the engine with all the accessories switched OFF. Drive the vehicle for 6 minutes at the following condition. Vehicle speed: More than 50 km/h (31 mph) Air flow rate: More than 12 g/sec Except fuel cut Stop the vehicle in a safe place and let the engine idle for 30 seconds. Turn the ignition switch to "LOCK" (OFF) position. Confirm that the diagnostic trouble code (DTC) is not output.

PATTERN 9

Drive cycle pattern

Inspection conditions

Engine coolant temperature at engine start: More than -10°C (14°F), less than 60°C (140°F)
Intake air temperature: More than -10°C (14°F)
Dropping of intake air temperature since engine start: Less than 10°C (18°F)
Condition of CVT: Selector lever "D" range

Test procedure

Start the engine with all the accessories switched OFF.
Drive the vehicle for 6 minutes at the following conditions. (During the monitor)

Vehicle speed: More than 50 km/h (31 mph)
Air flow rate: More than 10 g/sec
note The system is normal if engine coolant temperature will rise more than 77°C (171°F) within 6 minutes.

Stop the vehicle in a safe place and turn the ignition switch to "LOCK" (OFF) position.
Start the engine and do Steps 1 to 3 again.
Confirm that the diagnostic trouble code (DTC) is not output.

PATTERN 10

Drive cycle pattern

Inspection conditions

Engine coolant temperature: More than 76°C (169°F)
Intake air temperature: More than -10°C (14°F)
Barometric pressure: More than 76 kPa (22.4 in.Hg)
Condition of CVT: Selector lever "D" range

Test procedure

Start the engine with all the accessories switched OFF.
Drive the vehicle at 50 km/h (31 mph) for 6 minutes.
Release the accelerator pedal for 10 seconds then stop the vehicle in a safe place. (During the monitor)
Turn the ignition switch to "LOCK" (OFF) position.

Start the engine and do Steps 1 to 4 again.

note	When the vehicle is operating normally and the OBD-II Drive Cycle is carried out, the Readiness Codes will be set as "Complete" on the first drive cycle. The second drive cycle is required to set the Readiness Codes as "Complete" if a fault is detected during the first drive cycle.

Confirm that the diagnostic trouble code (DTC) is not output.

PATTERN 11

Drive cycle pattern
Inspection conditions	Engine coolant temperature: More than 0°C (32°F) Condition of CVT: Selector lever "D" range
Test procedure	Start the engine with all the accessories switched OFF. Let the engine idle for 3 minutes. Drive the vehicle for 30 seconds at the following conditions. (During the monitor) Engine speed: More than 1,200 r/min Engine load: More than 30 % Throttle position sensor output: Less than 3.0 volts Except fuel cut Stop the vehicle in a safe place and turn the ignition switch to "LOCK" (OFF) position. Confirm that the diagnostic trouble code (DTC) is not output.

PATTERN 12

Drive cycle pattern

Inspection conditions

Engine coolant temperature: More than 76°C (169°F)
Condition of CVT: Selector lever "D" range

Test procedure

Start the engine with all the accessories switched OFF.
Drive the vehicle at 50 km/h (31 mph) for 5 minutes.
Release the accelerator pedal for 5 seconds then stop the vehicle in a safe place.
Increase the speed of the vehicle to 50 km/h (31 mph) under the following conditions, and then drive the vehicle for 1 minute.

Engine speed: More than 1,500 r/min
Engine load: More than 40 %

Release the accelerator pedal for 5 seconds then stop the vehicle in a safe place.
Repeat Steps 4 and 5 for 2 times.
Stop the vehicle in a safe place and turn the ignition switch to "LOCK" (OFF) position.

Start the engine and do Steps 1 to 7 again.

note	When the vehicle is operating normally and the OBD-II Drive Cycle is carried out, the Readiness Codes will be set as "Complete" on the first drive cycle. The second drive cycle is required to set the Readiness Codes as "Complete" if a fault is detected during the first drive cycle.

Confirm that the diagnostic trouble code (DTC) is not output.

PATTERN 13

Inspection conditions	Engine coolant temperature at engine start: More than -10°C (14°F), less than 36°C (97°F) Difference between engine coolant temperature and intake air temperature at engine start: Less than 5°C (9°F) Condition of CVT: Selector lever "D" range
Test procedure	Start the engine with all the accessories switched OFF. Drive the vehicle at more than 30 km/h (19 mph) until engine coolant temperature rises more than 60°C (140°F). (During the monitor) Stop the vehicle in a safe place and turn the ignition switch to "LOCK" (OFF) position. Start the engine and do Steps 1 to 3 again. Confirm that the diagnostic trouble code (DTC) is not output.

PATTERN 14

Drive cycle pattern
Inspection conditions	Engine coolant temperature: More than -10°C (14°F) Barometric pressure: More than 76 kPa (22.4 in.Hg) Condition of CVT: Selector lever "D" range
Test procedure	Start the engine with all the accessories switched OFF. Drive the vehicle for 3 minutes at the following conditions. (During the monitor) Engine speed: More than 500 r/min, less than 3,000 r/min Engine load: More than 20 % Without rapid accelerator pedal change Except fuel cut Stop the vehicle in a safe place and turn the ignition switch to "LOCK" (OFF) position. Start the engine and do Steps 1 to 3 again. Confirm that the diagnostic trouble code (DTC) is not output.

PATTERN 15

Drive cycle pattern
Inspection condition	Condition of CVT: Selector lever "D" range
Test procedure	Start the engine with all the accessories switched OFF. Accelerate until the vehicle speed is more than 50 km/h (31 mph). Stop the vehicle in a safe place and let the engine idle for 20 seconds. (During the monitor) Repeat Steps 2 and 3 for 10 times. Stop the vehicle in a safe place and turn the ignition switch to "LOCK" (OFF) position. Start the engine and do Steps 1 to 5 again. Confirm that the diagnostic trouble code (DTC) is not output.

PATTERN 16

Drive cycle pattern
Inspection conditions	Engine coolant temperature: More than 20°C (68°F) Condition of CVT: Selector lever "D" range
Test procedure	Start the engine with all the accessories switched OFF. Drive the vehicle at more than 50 km/h (31 mph) for 30 seconds. (During the monitor) Stop the vehicle in a safe place and turn the ignition switch to "LOCK" (OFF) position. Start the engine and do Steps 1 to 3 again. Confirm that the diagnostic trouble code (DTC) is not output.

PATTERN 17

Inspection conditions	Engine coolant temperature: More than 41°C (106°F) Intake air temperature: More than -10°C (14°F) Barometric pressure: More than 76 kPa (22.4 in.Hg)
Test procedure	Start the engine with all the accessories switched OFF. Let the engine idle for 1 minute. (During the monitor) Turn the ignition switch to "LOCK" (OFF) position. Start the engine and do Steps 1 to 3 again. Confirm that the diagnostic trouble code (DTC) is not output.

PATTERN 18

Inspection conditions	Engine coolant temperature: More than 7°C (45°F), less than 41°C (106°F) Intake air temperature: More than -10°C (14°F) Barometric pressure: More than 76 kPa (22.4 in.Hg)
Test procedure	Start the engine with all the accessories switched OFF. Let the engine idle for 1 minute. (During the monitor) Turn the ignition switch to "LOCK" (OFF) position. Start the engine and do Steps 1 to 3 again. Confirm that the diagnostic trouble code (DTC) is not output.

PATTERN 19

Inspection condition	Engine coolant temperature: More than 77°C (171°F), less than 87°C (189°F)
Test procedure	Start the engine with all the accessories switched OFF. Drive the engine at 1,200 - 1,500 r/min for 30 seconds. (During the monitor) Turn the ignition switch to "LOCK" (OFF) position. Start the engine and do Steps 1 to 3 again. Confirm that the diagnostic trouble code (DTC) is not output.

PATTERN 20

Inspection condition	Engine coolant temperature: More than 76°C (169°F)
Test procedure	Start the engine with all the accessories switched OFF. Let the engine idle for 15 minutes. (During the monitor) Turn the ignition switch to "LOCK" (OFF) position. Start the engine and do Steps 1 to 3 again. Confirm that the diagnostic trouble code (DTC) is not output.

PATTERN 21

Inspection conditions	Intake air temperature: More than -10°C (14°F) Engine coolant temperature: More than 0°C (32°F)
Test procedure	Start the engine with all the accessories switched OFF. Let the engine idle for 6 minutes. (During the monitor) Turn the ignition switch to "LOCK" (OFF) position. Start the engine and do Steps 1 to 3 again. Confirm that the diagnostic trouble code (DTC) is not output.

PATTERN 22

Inspection conditions	Engine coolant temperature: More than 0°C (32°F) <Manifold absolute pressure sensor monitor> Fuel amount at engine start: Less than 80 % <Fuel tank pressure sensor monitor>
Test procedure	Start the engine with all the accessories switched OFF. Let the engine idle at the engine speed less than 1,000 r/min for 15 seconds. (During the monitor) Turn the ignition switch to "LOCK" (OFF) position. Start the engine and do Steps 1 to 3 again. Confirm that the diagnostic trouble code (DTC) is not output.

SYSTEM READINESS TEST STATUS

PURPOSE

The Readiness function (also referred to as I/M Readiness or I/M Flags) indicates if a full diagnostic check has been "Completed" (is "Ready") for each non-continuous monitor. Enhanced I/M State Emission Programs will use the Readiness status (Codes) to see if the vehicle is ready for OBD-II testing. "Incomplete" (Not Ready) codes will be one of the triggers for I/M failure.

OVERVIEW

The ECM monitors the following main diagnosis items and records whether the evaluation was completed or is incomplete. The Readiness Codes are established for the I/M programs, thereby confirming that the vehicles have not been tampered with by erasing the diagnostic trouble code(s) (DTCs) before I/M testing. The Readiness Codes and DTCs can be stored again by disconnecting the battery or by erasing the codes with a scan tool MB991958 (M.U.T.-III sub assembly). For this reason, all the Readiness Codes must be displayed "Complete" before I/M testing.

When the monitors run and complete, the scan tool MB991958 (M.U.T.-III sub assembly) will display the Readiness Codes as "Complete" (General Scan Tools display as "Ready"). When the vehicle is operating normally and the OBD-II Drive Cycle is carried out, the Readiness Codes will be stored as "Complete" on the first drive cycle. For DTCs requiring two drive cycles to detect a fault, the second drive cycle is required to set the Readiness Codes as "Complete" if a fault is detected during the first drive cycle. If the fault is still there after the second drive cycle, a DTC will be stored.

Catalyst: P0421
Evaporative system: P0442, P0455, P0456
Linear air-fuel ratio sensor: P0133
Linear air-fuel ratio sensor heater: P0031, P0053
Heated oxygen sensor: P0139, P0140
Heated oxygen sensor heater: P0037

After all the Readiness Codes are displayed as "Complete", the technician is assured that any DTCs related to the monitor will be displayed if the system has a problem. That is why some State's I/M programs require the Readiness Code as "Complete" before they check for DTCs.

note	After a repair is made for a DTC, the technician should drive the OBD-II Drive Cycle checking that the scan tool MB991958 (M.U.T.-III Sub Assembly) displays all the Readiness Codes as "Complete".