Code No. P2122: Accelerator Pedal Position Sensor (Main) Circuit Low Input






OPERATION




FUNCTION




TROUBLE JUDGMENT


Check Condition
Judgment Criterion

PROBABLE CAUSE




DIAGNOSIS PROCEDURE


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



  • Refer to Data List Reference Table .

    1. Item 78: Accelerator pedal position sensor (main)

Q. Is the check result normal?

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

STEP 2. Connector check: C-102 accelerator pedal position sensor connector



Q. Is the check result normal?

Go to Step 3.

Repair or replace.

STEP 3. Perform voltage measurement at C-102 accelerator pedal position sensor connector.




  • Disconnect connector, and measure at harness side.
  • Ignition switch: ON
  • Voltage between terminal No. 1 and earth.
OK: 4.9 - 5.1 V

Q. Is the check result normal?

Go to Step 7 .

Go to Step 4 .

STEP 4. Connector check: C-113 engine-ECU <M/T> connector or engine-A/T-ECU <A/T> connector



Q. Is the check result normal?

Go to Step 5 .

Repair or replace.

STEP 5. Check harness between C-102 (terminal No. 1) accelerator pedal position sensor connector and C-113 (terminal No. 92) engine-ECU <M/T> or engine-A/T-ECU <A/T> connector.




Q. Is the check result normal?

Go to Step 6 .

Repair.

STEP 6. M.U.T.-III data list



  • Refer to Data List Reference Table .

    1. Item 78: Accelerator pedal position sensor (main)

Q. Is the check result normal?

Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points ).
Replace engine-ECU <M/T> or engine-A/T-ECU <A/T>.

STEP 7. Connector check: C-113 engine-ECU <M/T> connector or engine-A/T-ECU <A/T> connector



Q. Is the check result normal?

Go to Step 8 .

Repair or replace.

STEP 8. Check harness between C-102 (terminal No. 1) accelerator pedal position sensor connector and C-113 (terminal No. 92) engine-ECU <M/T> connector or engine-A/T-ECU <A/T> connector.





  • Check power supply line for damage.

Q. Is the check result normal?

Go to Step 9 .

Repair.

STEP 9. Check harness between C-102 (terminal No. 3) accelerator pedal position sensor connector and C-113 (terminal No. 114) engine-ECU <M/T> connector or engine-A/T-ECU <A/T> connector.





  • Check output line for damage.

Q. Is the check result normal?

Go to Step 10 .

Repair.

STEP 10. Replace the accelerator pedal assembly



  • After replacing the accelerator pedal assembly, re-check the trouble symptoms.

Q. Is the check result normal?

Check end.
Replace engine-ECU <M/T> or engine-A/T-ECU <A/T>.