Electronic Throttle Actuator: Testing and Inspection

THROTTLE ACTUATOR INSPECTION[AJ]

CAUTION: When the ignition switch is turned to the ON position, the PCM operates the throttle actuator to adjust the throttle valve position. At this time, do not touch the valve to open or close it because your fingers could be pinched.

NOTE: Perform the following inspection only when directed.

Visual Inspection
1. Verify that no DTCs related stored to the TP or APP sensors have been stored.
- If any DTCs have been stored, perform the applicable DTC inspection. (See DTC TABLE[AJ].) Diagnostic Trouble Code Descriptions
2. Remove the air hose from the throttle body.
3. Turn the ignition switch to the ON position.
4. Operate the accelerator pedal and verify that the throttle valve opens and closes in accordance with the pedal movement.
- If it cannot be verified, perform the "Continuity Inspection".

Continuity Inspection
1. Disconnect the negative battery cable.
2. Disconnect the throttle actuator connector.
3. Inspect for continuity between the throttle actuator terminals A and B using an ohmmeter.
- If not as specified, replace the throttle body.
- If as specified, perform the "Circuit Open/Short Inspection".

Circuit Open/short Inspection
1. Disconnect the PCM connector.




2. Inspect the following wiring harnesses for open or short circuit (continuity check).

Open circuit
- If there is no continuity, there is an open circuit. Repair or replace the harness.
- Throttle actuator terminal B and PCM terminal 2A
- Throttle actuator terminal A and PCM terminal 2B

Short circuit
- If there is continuity, there is a short circuit. Repair or replace the harness.
- Throttle actuator terminal B and power supply
- Throttle actuator terminal B and body ground
- Throttle actuator terminal A and power supply
- Throttle actuator terminal A and body ground