Electronic Throttle Control System Inspection

Electronic Throttle Control System Inspection

Engine 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.

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 or P0507 is not displayed.
- If P0506, or P0507 is displayed, perform DTC inspection. 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.

Engine Speed:

- If load condition is not as specified, inspect the following:
- A/C switch and related harness.
- Fan switch and related harness.
- PSP switch and related harness.