Electronic Throttle Control System Inspection
Electronic Throttle Control InspectionEngine coolant temperature compensation inspection
1. Connect the WDS or equivalent to the DLC-2.
2. Select the PID/DATA MONITOR AND RECORD function on the WDS or equivalent display.
3. Select the following PIDs.
- ECT
- IAT
- RPM
4. Verify that the engine is in cold condition, then start the engine.
5. Verify that the engine speed decreases as the engine warm-up.
- If the engine speed does not decrease or decreases slowly, inspect the following:
- ECT sensor and related harness
- Throttle body and related harness (See THROTTLE ACTUATOR INSPECTION.) (See THROTTLE POSITION (TP) SENSOR INSPECTION.)
Load compensation inspection
1. Start the engine and run is at idle.
2. Connect the WDS or equivalent to the DLC-2.
3. Verify that P0506, P0507 or P0511 are 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 not as specified at specific load condition, 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