Code No. P0107: Manifold Absolute Pressure Sensor Circuit Low Input




OPERATION




FUNCTION




TROUBLE JUDGMENT


Check Conditions
Judgement Criterion

FAIL-SAFE AND BACKUP FUNCTION




PROBABLE CAUSES





DIAGNOSIS PROCEDURE


STEP 1. M.U.T.-III data list



  • Data list reference table (Refer to ).

  1. Item 8: Manifold absolute pressure sensor

Q. Is the check result normal?

Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions ).
Go to Step 2.

STEP 2. Perform voltage measurement at manifold absolute pressure sensor connector.



  • Disconnect connector, and measure at harness side.
  • Ignition switch: "ON"
  • Voltage between terminal engine-ECU MAP5 line and body earth.
OK: 4.9 - 5.1 V

Q. Is the check result normal?

Go to Step 5.
Go to Step 3.

STEP 3. Check harness between manifold absolute pressure sensor connector terminal and engine-ECU connector terminal MAP5.



  • Check power supply line for open/short circuit.

Q. Is the check result normal?

Go to Step 4.
Repair or replace the connector, or repair the damaged harness wire.

STEP 4. M.U.T.-III data list



  • Data list reference table (Refer to ).

  1. Item 8: Manifold absolute pressure sensor

Q. Is the check result normal?

Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions ).
Replace the engine-ECU.

STEP 5. Check harness between manifold absolute pressure sensor connector terminal and engine-ECU connector terminal MAP5.



  • Check power supply line for damage.

Q. Is the check result normal?

Go to Step 6.
Repair or replace the connector, or repair the damaged harness wire.

STEP 6. Perform voltage measurement at manifold absolute pressure sensor connector.



  • Use special tool test harness (MB991709) to connect connector, and measure at pick-up harness.
  • Ignition switch: "ON"
  • Voltage between terminal engine-ECU MAP line and body earth.

    Altitude 0 m: 3.8 - 4.2 V
    Altitude 600 m: 3.5 - 3.9 V
    Altitude 1,200 m: 3.3 - 3.7 V
    Altitude 1,800 m: 3.0 - 3.4 V

Q. Is the check result normal?

Go to Step 8.
Go to Step 7.

STEP 7. Check harness between manifold absolute pressure sensor connector terminal and engine-ECU connector terminal MAP.



  • Check output line for short circuit.

Q. Is the check result normal?

Replace the manifold absolute pressure sensor.
Repair the damaged harness wire.

STEP 8. Perform voltage measurement at engine-ECU connector.



  • Disconnect engine-ECU harness, and connect special tool power plant ECU check harness (MB992110) to measure at connector for inspection.
  • Ignition switch: "ON"
  • Voltage between terminal MAP and body earth.

    Altitude 0 m: 3.8 - 4.2 V
    Altitude 600 m: 3.5 - 3.9 V
    Altitude 1,200 m: 3.3 - 3.7 V
    Altitude 1,800 m: 3.0 - 3.4 V

Q. Is the check result normal?

Go to Step 4.

    Repair or replace the connector, or check and repair harness between manifold absolute pressure sensor connector terminal and engine-ECU connector terminal MAP.

    • Check output line for open circuit and damage.