55-DIAGNOSTIC FUNCTION

DIAGNOSTIC FUNCTION

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

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.-IIISE), always turn the electric motor switch to the OFF position before connecting or disconnecting scan tool (M.U.T.-IIISE).

1. Ensure that the electric motor switch is at the 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.-IIISE) is the reverse of the connecting sequence, making sure that the electric motor switch is at the 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)

note	If the battery voltage is low, diagnostic trouble codes will not be set. Check the battery if scan tool (M.U.T.-IIISE) does not display.

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

2. Turn the electric motor switch to the ON position.

3. Select "STV" .

4. Select "Air Conditioner".

5. Select "Diagnostic Trouble Code" to read the DTC.

6. If a DTC is set, it is shown.

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

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)

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

2. Turn the electric motor switch to the ON position.

3. Select "CAN bus diagnosis" from the System select screen.

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

CHECK OF FREEZE FRAME DATA

To detect fault and set the DTC, the ETACS-ECU obtains data before the confirmation of the DTC and data when the DTC is confirmed, and then stores the current condition of the ETACS-ECU. By analyzing each data from scan tool (M.U.T.-IIISE), the troubleshooting can be performed more efficiently. Display items of the freeze frame data are as follows.

Display item list

Item No.	Item name	Data item	Unit
1	Odometer	Total driving distance after the DTC is generated	km (mile)
2	Ignition cycle	Number of times the electric motor switch is turned "OFF (OFF or ACC)" after the past failure transition.	Number of counts is displayed.
4	Accumulated minute	Cumulative time for current malfunction of DTC	min

OBD-II DRIVE CYCLE

All kinds of diagnostic trouble codes (DTCs) can be monitored by carrying out a short drive according to the following 5 drive cycle patterns. In other words, doing such a drive regenerates any kind of trouble which involves illuminating the Malfunction Indicator light (SERVICE ENGINE SOON or Check Engine light) and verifies the repair procedure has been eliminated [the trouble the Malfunction Indicator light (SERVICE ENGINE SOON or Check Engine light) is no longer illuminated].

caution

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

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

DRIVE CYCLE PATTERN LIST

MONITOR ITEM	DTC	PATTERN
A/C pressure sensor (Rationality-low, Rationality-high)	P0531	1
A/C pressure sensor (Range check-min)	P0532	2
A/C pressure sensor (Range check-max)	P0533	3
Battery cooling evaporator temperature sensor (Range check-min, Range check-max)	P1F0D, P1F0E
Compressor input voltage circuit	P0D69, P0D6A, P0D6B
Controller area network-MAIN	U1008, U1167
Controller area network-EV	U1009, U1166
Battery cooling evaporator temperature sensor (Rationality-correlation)	P1F0C	4
Compressor	P1F08	5

PATTERN 1

Inspection conditions

Use scan tool (M.U.T.-IIISE) to check the PHEV-ECU data list and the BMU data list.

Item No.300 State of charge(control value): 40 % to 60 % <PHEV-ECU>
Item No. 10 Module minimum temperature: 15°C (59°F) or more <BMU> [When the ambient temperature is 20°C (68°F) to 30°C (86°F)]

Test procedure

Depress the brake pedal, and turn on the power supply mode of the electric motor switch (READY operation)^*.
note ^*: When a DTC is set, you cannot make the READY (ready to drive) indicator illuminate by making the READY operation.
Wait for at least five minutes.
Press the battery charge switch and let the engine run for 3 seconds.
Turn off the power supply mode of the electric motor switch.
Wait for at least ten seconds.
Depress the brake pedal, and turn on the power supply mode of the electric motor switch (READY operation)^*.
note ^*: When a DTC is set, you cannot make the READY (ready to drive) indicator illuminate by making the READY operation.
Wait for at least five minutes.
Confirm that the DTC is not set.

PATTERN 2

Inspection conditions

Use scan tool (M.U.T.-IIISE) to check the PHEV-ECU data list and the BMU data list.

Item No.300 State of charge(control value): 40 % to 60 % <PHEV-ECU>
Item No. 10 Module minimum temperature: 15°C (59°F) or more <BMU> [When the ambient temperature is 20°C (68°F) to 30°C (86°F)]

Test procedure

Depress the brake pedal, and turn on the power supply mode of the electric motor switch (READY operation)^*.
note ^*: When a DTC is set, you cannot make the READY (ready to drive) indicator illuminate by making the READY operation.
Drive the vehicle for 5 seconds at 3 km/h (2 mph) or higher, and stop the vehicle.
Press the battery charge switch and let the engine run for 3 seconds.
Turn off the power supply mode of the electric motor switch.
Wait for at least ten seconds.
Depress the brake pedal, and turn on the power supply mode of the electric motor switch (READY operation)^*.
note ^*: When a DTC is set, you cannot make the READY (ready to drive) indicator illuminate by making the READY operation.
Drive the vehicle for 5 seconds at 3 km/h (2 mph) or higher, and stop the vehicle.
Confirm that the DTC is not set.

PATTERN 3

Inspection conditions

Use scan tool (M.U.T.-IIISE) to check the PHEV-ECU data list.

Item No.300 State of charge(control value): 40 % to 60 %

Test procedure

Depress the brake pedal, and turn on the power supply mode of the electric motor switch (READY operation)^*.
note ^*: When a DTC is set, you cannot make the READY (ready to drive) indicator illuminate by making the READY operation.
Wait for at least five seconds.
Press the battery charge switch and let the engine run for 3 seconds.
Turn off the power supply mode of the electric motor switch.
Wait for at least ten seconds.
Depress the brake pedal, and turn on the power supply mode of the electric motor switch (READY operation)^*.
note ^*: When a DTC is set, you cannot make the READY (ready to drive) indicator illuminate by making the READY operation.
Wait for at least five seconds.
Confirm that the DTC is not set.

PATTERN 4

Inspection conditions

Use scan tool (M.U.T.-IIISE) to check the PHEV-ECU data list.

Item No.300 State of charge(control value): 40 % to 60 %

Test procedure

Depress the brake pedal, and turn on the power supply mode of the electric motor switch (READY operation)^*.
note ^*: When a DTC is set, you cannot make the READY (ready to drive) indicator illuminate by making the READY operation.
Use scan tool (M.U.T.-IIISE) to execute the actuator test of the BMU (item No.1: Battery cooling fan PWM). Activate the fan motor and wait for at least seven minutes.
Press the battery charge switch and let the engine run for 3 seconds.
Turn off the power supply mode of the electric motor switch.
Wait for at least ten seconds.
Depress the brake pedal, and turn on the power supply mode of the electric motor switch (READY operation)^*.
note ^*: When a DTC is set, you cannot make the READY (ready to drive) indicator illuminate by making the READY operation.
Use scan tool (M.U.T.-IIISE) to execute the actuator test of the BMU (item No.1: Battery cooling fan PWM). Activate the fan motor and wait for at least seven minutes.
Confirm that the DTC is not set.

PATTERN 5

Inspection conditions

Use scan tool (M.U.T.-IIISE) to check the PHEV-ECU data list.

Item No.300 State of charge(control value): 40 % to 60 %

Test procedure

Depress the brake pedal, and turn on the power supply mode of the electric motor switch (READY operation)^*.
note ^*: When a DTC is set, you cannot make the READY (ready to drive) indicator illuminate by making the READY operation.
Set the heater controller to the MAX COOL position, and wait for at least three seconds.
Press the battery charge switch and let the engine run for 3 seconds.
Turn off the power supply mode of the electric motor switch.
Wait for at least ten seconds.
Depress the brake pedal, and turn on the power supply mode of the electric motor switch (READY operation)^*.
note ^*: When a DTC is set, you cannot make the READY (ready to drive) indicator illuminate by making the READY operation.
Set the heater controller to the MAX COOL position, and wait for at least three seconds.
Confirm that the DTC is not set.