Diagnostic procedure
WARNING: This page is about a different car, the 2005 Mazda MPV. However, it is still accessible from the selected car via links, so may be relevant.
SLOW RETURN TO IDLE - DIAGNOSTIC PROCEDURE
| STEP |
INSPECTION |
ACTION |
| 1 |
- Connect WDS or equivalent to DLC-2.
- Turn ignition key to ON (Engine OFF).
- Retrieve any DTCs.
- Is "PASSED" displayed?
|
Yes |
No DTC is displayed:
|
| No |
DTC is displayed:
- Go to appropriate DTC test.
|
| 2 |
|
Yes |
ECT and thermostat are okay.
Go to next step. |
| No |
Access ECT PID.
Inspect for both ECT PID and temperature gauge on instrument cluster readings.
- If temperature gauge on instrument cluster indicates normal range but ECT PID is not same as temperature gauge reading, inspect ECT sensor.
- If temperature gauge on instrument cluster indicates cold range but ECT PID is normal, inspect temperature gauge and heat gauge unit.
|
| 3 |
- Is throttle body free of contaminations?
|
Yes |
Inspect for air leakage from intake-air system components while racing engine to higher speed. |
| No |
Clean or replace throttle body. |
| 4 |
- Verify test results.
- If okay, return to diagnostic index to service any additional symptoms.
- If malfunction remains, inspect related Service Bulletins and/or On-line Repair Information and perform repair or diagnosis.
- If vehicle is repaired, troubleshooting completed.
- If vehicle is not repaired or additional diagnostic information is not available, replace or reprogram PCM.
|