NO.20 NOISE OCCURS AT IDLE WHEN VEHICLE IS STOPPED IN ALL POSITIONS/RANGES [FN4A-EL]


20	Noise occurs at idle when vehicle is stopped in all positions/ranges
DESCRIPTION	• Transaxle noisy in all positions and ranges when vehicle is idling.
POSSIBLE CAUSE	• The malfunction is in the oil pump which causes a high-pitched noise to be emitted from the transaxle at idle. Note • If a noise is emitted during shifting only, the malfunction is in shift solenoid D, E or shift solenoid A, B, C. If a noise is emitted during shifting at certain gears only or during deceleration only, it is gear noise. • Before following troubleshooting steps, make sure that Automatic Transaxle On-Board Diagnostic and Automatic Transaxle Basic Inspection are conducted.


STEP	INSPECTION		ACTION
1	• Inspect engine condition. • Is any engine concern (i. e. rough idle)?	Yes	Go to appropriate symptom troubleshooting. (See ENGINE SYMPTOM TROUBLESHOOTING.)
1		No	Go to next step.
2	• Does noise stop when solenoid connector is disconnected?	Yes	Go to next step.
2	• Does noise stop when solenoid connector is disconnected?	No	Overhaul control valve body and repair or replace any defective parts. (See ATX workshop manual (FN4A-EL) [1623-10-98E].) If problem remains, overhaul transaxle and repair or replace any defective parts. (See ATX workshop manual (FN4A-EL) [1623-10-98E].)
3	• Check the value at the following PIDs using the WDS or equivalent. (See PCM INSPECTION [WITHOUT WU-TWC].) (See PCM INSPECTION [WITH WU-TWC].) - TP - VSS - TSS • Are PID values normal?	Yes	Go to next step.
3		No	Repair or replace any defective parts.
4	• Disconnect PCM. • Is resistance between ground terminal at PCM connector and body ground less than 5.0 ohms?	Yes	Go to next step.
4		No	Repair open ground circuit. Reconnect PCM.
5	• Check LPS PID value. (See PCM INSPECTION [WITHOUT WU-TWC].) (See PCM INSPECTION [WITH WU-TWC].) • Is LPS PID value normal?	Yes	Overhaul control valve body and repair or replace any defective parts. (See ATX workshop manual (FN4A-EL) [1623-10-98E].) If problem remains, overhaul transaxle and repair or replace any defective parts. (See ATX workshop manual (FN4A-EL) [1623-10-98E].)
5		No	Repair or replace any defective parts.
6	• Verify test results. - If normal, return to diagnostic index to service any additional symptoms. - If malfunction remains, inspect related Service Information and perform repair or diagnosis. • If vehicle repaired, troubleshooting completed. • If vehicle not repaired or additional diagnostic information not available, replace PCM.