Electronic Throttle Actuator: Testing and Inspection
ELECTRONIC THROTTLE CONTROL SYSTEM INSPECTIONEngine coolant temperature compensation inspection
1. Connect the WDS or equivalent to the DLC-2.
2. Access the following PIDs:
- ECT
- IAT
- RPM
3. Verify that the engine is cold, then start the engine.
4. Verify that the engine speed decreases as the engine warms up.
- If the engine speed does not decrease or decreases slowly, inspect the following:
- ECT sensor and related wiring harness
- Electronic throttle body and related wiring harness
Load compensation inspection
1. Start the engine and idle it.
2. Connect the WDS or equivalent to the DLC-2.
3. Verify that P0506, P0507, or P0511 is not displayed.
- If P0506, P0507 or P0511 are displayed, perform DTC inspection.
4. Access the RPM PID.
NOTE: Excludes temporary idle speed drop just after the loads are turned on.
5. Verify that the engine speed is within the specification under each load condition.
- If load condition is not as specified, inspect the following:
- A/C switch and related wiring harness
(See CLIMATE CONTROL UNIT INSPECTION.)
- Fan switch and related wiring harness
(See CLIMATE CONTROL UNIT INSPECTION.)