STEP 1. Using scan tool MB991958, check data list item 13: Throttle 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) Detach the intake air hose at the throttle body.
(3) Disconnect the connector of the electronic-controlled throttle valve.
(4) Use test harness special tool (MB991658) to connect only terminals No. 3, No. 4, No. 5, and No. 6.
(5) Turn the ignition switch to the "ON" position.
(6) Set scan tool MB991958 to the data reading mode for item 13, Throttle Position Sensor (main).- Output voltage should be between 300 and 700 millivolts when the throttle valve is fully closed with your finger.
- Output voltage should be 4,000 millivolts or more when the throttle valve is fully open with your finger.
(7) Turn the ignition switch to the "LOCK" (OFF) position.
Is the sensor operating properly?
Go to Step 2. Refer to, DTC P0122 - Throttle Position Sensor (main) Circuit Low Input , DTC P0123 - Throttle Position Sensor (main) Circuit High Input .
STEP 2. Using scan tool MB991958, check data list item 15: Throttle Position Sensor (sub).
(1) Detach the intake air hose at the throttle body.
(2) Disconnect the connector of the electronic-controlled throttle valve.
(3) Use test harness special tool (MB991658) to connect only terminals No. 3, No. 4, No. 5, and No. 6.
(4) Turn the ignition switch to the "ON" position.
(5) Set scan tool MB991958 to the data reading mode for item 15, Throttle Position Sensor (sub).- Output voltage should be 4,000 millivolts or more when the throttle valve is fully closed with your finger.
- Output voltage should be 1,000 millivolts or less when the throttle valve is fully open with your finger.
(6) Turn the ignition switch to the "LOCK" (OFF) position.
Is the sensor operating properly?
Go to Step 3. Refer to, DTC P0222 - Throttle Position Sensor (sub) Circuit Low Input , DTC P0223 - Throttle Position Sensor (sub) Circuit High Input .
STEP 3. Check harness connector B-12 at electronic-controlled throttle valve for damage.
STEP 4. Check the continuity at electronic-controlled throttle valve harness side connector B-12.
STEP 5. Check harness connector B-26 at ECM for damage.
STEP 6. Check for harness damage between electronic-controlled throttle valve connector B-12 (terminal No. 3) and ECM connector B-26 (terminal No. 13).
STEP 7. Using scan tool MB991958, read the diagnostic trouble code (DTC).
(1) Turn the ignition switch to the "ON" position.
(2) Erase the DTC.
(3) Depress the accelerator pedal fully for a few seconds.
(4) Check the DTC.
(5) Turn the ignition switch to the "LOCK" (OFF) position.
Is DTC P2135 set?
Replace the ECM (Refer to, Removal and Installation ). Then go to Step 13. 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 8. Check harness connector B-26 at ECM for damage.
STEP 9. Check for harness damage between electronic-controlled throttle valve connector B-12 (terminal No. 5) and ECM connector B-26 (terminal No. 12).
STEP 10. Check for harness damage between electronic-controlled throttle valve connector B-12 (terminal No. 4) and ECM connector B-26 (terminal No. 10).
STEP 11. Check for harness damage between electronic-controlled throttle valve connector B-12 (terminal No. 6) and ECM connector B-26 (terminal No. 11).
STEP 12. Replace the throttle body assembly.
(1) Replace the throttle body assembly.
(2) Turn the ignition switch to the "ON" position.
(3) Erase the DTC.
(4) Depress the accelerator pedal fully for a few seconds.
(5) Check the DTC.
(6) Turn the ignition switch to the "LOCK" (OFF) position.
Is DTC P2135 set?
Replace the ECM (Refer to, Removal and Installation ). Then go to Step 13. The inspection is complete.
STEP 13. Using scan tool MB991958, read the diagnostic trouble code (DTC).
(1) Turn the ignition switch to the "ON" position.
(2) Erase the DTC.
(3) Depress the accelerator pedal fully for a few seconds.
(4) Check the DTC.
(5) Turn the ignition switch to the "LOCK" (OFF) position.
Is DTC P2135 set?
Retry the troubleshooting. The inspection is complete.