STEP 1. Using scan tool MB991958, check data list item 11: Accelerator Pedal Position Sensor (main).
caution | To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958. |
(1) Connect scan tool MB991958 to the data link connector.
(2) Turn the ignition switch to the "ON" position.
(3) Set scan tool MB991958 to the data reading mode for item 11, Accelerator Pedal Position Sensor (main).- Output voltage should be between 900 and 1,100 millivolts when foot is released from accelerator pedal.
- Output voltage should be 4,000 millivolts or more when accelerator pedal is fully depressed.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Is the sensor operating properly?
Go to Step 2. Refer to, DTC P2122 - Accelerator Pedal Position Sensor (main) Circuit Low Input , DTC P2123 - Accelerator Pedal Position Sensor (main) Circuit High Input .
STEP 2. Using scan tool MB991958, check data list item 12: Accelerator Pedal Position Sensor (sub).
STEP 3. Check harness connector C-23 at accelerator pedal position sensor for damage.
STEP 4. Check the continuity at accelerator pedal position sensor harness side connector C-23.
STEP 5. Check harness connector B-27 at ECM for damage.
STEP 6. Check for harness damage between accelerator pedal position sensor connector C-23 (terminal No. 2) and ECM connector B-27 (terminal No. 76).
STEP 7. Check the continuity at accelerator pedal position sensor harness side connector C-23.
STEP 8. Check harness connector B-27 at ECM for damage.
STEP 9. Check for harness damage between accelerator pedal position sensor connector C-23 (terminal No. 5) and ECM connector B-27 (terminal No. 79).
STEP 10. Using scan tool MB991958, read the diagnostic trouble code (DTC).
(1) Turn the ignition switch to the "ON" position.
(2) After the DTC has been deleted, read the DTC again.
(3) Turn the ignition switch to the "LOCK" (OFF) position.
Is DTC P2138 set?
Replace the ECM (Refer to, Removal and Installation ). Then go to Step 17. It can be assumed that this malfunction is intermittent. Refer to GROUP 00, How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions .
STEP 11. Check harness connector B-27 at ECM for damage.
STEP 12. Check for harness damage between accelerator pedal position sensor connector C-23 (terminal No. 1) and ECM connector B-27 (terminal No. 75).
STEP 13. Check for harness damage between accelerator pedal position sensor connector C-23 (terminal No. 4) and ECM connector B-27 (terminal No. 78).
STEP 14. Check for harness damage between accelerator pedal position sensor connector C-23 (terminal No. 3) and ECM connector B-27 (terminal No. 74).
STEP 15. Check for harness damage between accelerator pedal position sensor connector C-23 (terminal No. 6) and ECM connector B-27 (terminal No. 77).
STEP 16. Replace the accelerator pedal assembly.
(1) Replace the accelerator pedal assembly.
(2) Turn the ignition switch to the "ON" position.
(3) After the DTC has been deleted, read the DTC again.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Is DTC P2138 set?
Replace the ECM (Refer to, Removal and Installation ). Then go to Step 17. The inspection is complete.
STEP 17. Using scan tool MB991958, read the diagnostic trouble code (DTC).
(1) Turn the ignition switch to the "ON" position.
(2) After the DTC has been deleted, read the DTC again.
(3) Turn the ignition switch to the "LOCK" (OFF) position.
Is DTC P2138 set?
Retry the troubleshooting. The inspection is complete.