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DTC P0106-00: Manifold Absolute Pressure Sensor plausibility check
 
 
 
 
TECHNICAL DESCRIPTION
  • Compare the actual measurement of manifold pressure by a manifold absolute pressure sensor signal with the manifold pressure estimated from a throttle position sensor (main) signal.
  • Compare the actual measurement of manifold pressure by a manifold absolute pressure sensor signal with the manifold pressure estimated from a throttle position sensor (sub) signal.
 
 
DESCRIPTIONS OF MONITOR METHODS
Compare load value with manifold absolute pressure sensor output voltage.
 
 
MONITOR EXECUTION
Continuous.
 
 
MONITOR EXECUTION CONDITIONS (Other monitor and Sensor)
Other Monitor (There is no temporary DTC set in memory for the item monitored below)
  • Not applicable
Sensor (The sensor below is determined to be normal)
  • Mass airflow sensor
  • Engine coolant temperature sensor
  • Intake air temperature sensor
  • Barometric pressure sensor
  • Throttle position sensor
 
 
DTC SET CONDITIONS
Logic Flow Chart
Check Conditions
  • The difference between the actual manifold pressure and the manifold pressure estimated by the throttle position sensor (main) is more than 0 kPa (0 in.Hg).
  • The difference between the actual manifold pressure and the manifold pressure estimated by the throttle position sensor (sub) is more than 0 kPa (0 in.Hg). Or, the manifold pressure is 73 kPa (21.6 in.Hg) or less.
  • Engine speed is 750 r/min or higher.
Judgment Criteria
  • For 0.36 second, the difference between the actual manifold pressure and the manifold pressure estimated by the throttle position sensor (main) is more than 40 kPa (11.8 in.Hg).
  • For 0.36 second, the difference between the actual manifold pressure and the manifold pressure estimated by the throttle position sensor (sub) is more than 40 kPa (11.8 in.Hg).
  • For 0.36 second, the difference between the manifold pressure estimated by the throttle position sensor (main) and the manifold pressure estimated by the throttle position sensor (sub) is less than 7 kPa (2.1 in.Hg).
 
 
FAIL-SAFE AND BACKUP FUNCTION
Carry out the fuel control by estimating the intake manifold pressure from throttle opening degree and a normal sensor.
 
 
OBD-II DRIVE CYCLE PATTERN
Refer to Diagnostic Function, OBD-II Drive Cycle – Pattern 1 OBD- II DRIVE CYCLE.
 
 
TROUBLESHOOTING HINTS (The most likely causes for this code to be set are:)
  • Manifold absolute pressure sensor failed.
  • Manifold absolute pressure sensor circuit harness damage or connector damage.
  • ECM failed.
 
 
DIAGNOSIS
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
  • MB991709: Test harness
1.STEP 1. Using scan tool (M.U.T.-III SE), check the data list.
Use scan tool (M.U.T.-III SE) to check the data list (Refer to DATA LIST REFERENCE TABLE).
  • Item number 70: Boost Sensor
Q: Is the check result normal?
 
2.STEP 2. Perform voltage measurement at manifold absolute pressure sensor connector terminal number 1.
  • Use special tool test harness (MB991709) to connect connector, and measure at pick-up harness.
  • Power supply mode of electric motor switch: ON
  • Voltage between manifold absolute pressure sensor connector terminal number 1 and ground.
OK:
  • Altitude 0 m (0 ft.): 3.8 to 4.2 volts
  • Altitude 600 m (1,969 ft.): 3.5 to 3.9 volts
  • Altitude 1,200 m (3,937 ft.): 3.3 to 3.7 volts
  • Altitude 1,800 m (5,906 ft.): 3.0 to 3.4 volts
Q: Is the check result normal?
 
3.STEP 3. Perform voltage measurement at manifold absolute pressure sensor connector terminal number 3.
  • Disconnect connector, and measure at harness side.
  • Power supply mode of electric motor switch: ON
  • Voltage between manifold absolute pressure sensor connector terminal number 3 and ground.
OK: 4.9 to 5.1 volts
Q: Is the check result normal?
 
4.STEP 4. Check harness between manifold absolute pressure sensor connector terminal number 3 and ECM connector terminal number 31.
Check power supply line for open/short circuit.
Q: Is the check result normal?
Repair or replace the connector, or repair the damaged harness wire.
 
5.STEP 5. Perform voltage measurement at manifold absolute pressure sensor connector terminal number 2.
  • Use special tool test harness (MB991709) to connect connector, and measure at pick-up harness.
  • Power supply mode of electric motor switch: ON
  • Voltage between manifold absolute pressure sensor connector terminal number 2 and ground.
OK: Voltage should be 0.5 volt or less.
Q: Is the check result normal?
Replace the manifold absolute pressure sensor (Refer to ENGINE, Intake and Exhaust – Intake Manifold INTAKE MANIFOLD REMOVAL AND INSTALLATION). Then
 
6.STEP 6. Check harness between manifold absolute pressure sensor connector terminal number 2 and ECM connector terminal number 41.
Check ground line for open circuit and damage.
Q: Is the check result normal?
Repair or replace the connector, or repair the damaged harness wire.
 
7.STEP 7. Check harness between manifold absolute pressure sensor connector terminal number 1 and ECM connector terminal number 42.
Check output line for short circuit.
Q: Is the check result normal?
Repair or replace the connector, or repair the damaged harness wire.
 
8.STEP 8. Using scan tool (M.U.T.-III SE), check the data list.
Use scan tool (M.U.T.-III SE) to check the data list (Refer to DATA LIST REFERENCE TABLE).
  • Item number 70: Boost Sensor
Q: Is the check result normal?
Replace the manifold absolute pressure sensor (Refer to ENGINE, Intake and Exhaust – Intake Manifold INTAKE MANIFOLD REMOVAL AND INSTALLATION). Then
 
9.STEP 9. Test the OBD-II drive cycle.
After erasing the DTC, carry out test drive with the drive cycle pattern, and recheck the DTC.
(1) Use scan tool (M.U.T.-III SE) to erase the DTC.
(2) Carry out test drive with the drive cycle pattern (Refer to Diagnostic Function, OBD-II Drive Cycle – Pattern 1 OBD- II DRIVE CYCLE).
(3) Use scan tool (M.U.T.-III SE) to recheck the DTC.
Q: Is DTC P0106-00 set?
Replace the ECM (Refer to ENGINE CONTROL MODULE (ECM) REMOVAL AND INSTALLATION).
Intermittent malfunction (Refer to GENERAL INFORMATION, General Information – How to Use Troubleshooting/Inspection Service Points – How to Cope with Intermittent Malfunctions HOW TO COPE WITH INTERMITTENT MALFUNCTIONS).
 
10.STEP 10. Test the OBD-II drive cycle.
After erasing the DTC, carry out test drive with the drive cycle pattern, and recheck the DTC.
(1) Use scan tool (M.U.T.-III SE) to erase the DTC.
(2) Carry out test drive with the drive cycle pattern (Refer to Diagnostic Function, OBD-II Drive Cycle – Pattern 1 OBD- II DRIVE CYCLE).
(3) Use scan tool (M.U.T.-III SE) to recheck the DTC.
Q: Is DTC P0106-00 set?
Retry the troubleshooting.
The inspection is complete.