Electronic Throttle Control System Inspection
Electronic Throttle Control System InspectionEngine coolant temperature compensation inspection
1. Connect WDS or equivalent to the DLC-2.
2. Select 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 harness.
- Electronic throttle body and related harness (See THROTTLE ACTUATOR INSPECTION.)
Load compensation inspection
1. Start the engine and run it at idle.
2. Connect 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. (See DTC TABLE Diagnostic Trouble Code Descriptions)
4. Select 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 harness (See CLIMATE CONTROL UNIT INSPECTION.)
- Fan switch and related harness (See CLIMATE CONTROL UNIT INSPECTION.)
- PSP switch and related harness.