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


id050301802500

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.

Diagnostic procedure

STEP

INSPECTION

ACTION

1
Inspect engine condition.
Is any engine concern (i. e. rough idle)?
Yes
Go to appropriate symptom troubleshooting.
No
Go to next step.
2
Does noise stop when solenoid connector is disconnected?
Yes
Go to next step.
No
Overhaul control valve body and repair or replace any defective parts.
If problem remains, overhaul transaxle and repair or replace any defective parts.
3
Check the value at the following PIDs using the M-MDS.
•  APP
•  VSS
•  TSS
Are PID values okay?
Yes
Go to next step.
No
Repair or replace any defective parts.
4
Disconnect PCM connector.
Is resistance between GND terminal at PCM connector and body GND less than 5.0 ohms?
Yes
Go to next step.
No
Repair open GND circuit.
Reconnect PCM.
5
Check LPS PID value.
Is LPS PID value okay?
Yes
Overhaul control valve body and repair or replace any defective parts.
If problem remains, overhaul transaxle and repair or replace any defective parts.
No
Repair or replace any defective parts.
6
•  Verify test results.
―  If okay, return to diagnostic index to service any additional symptoms.
―  If malfunction remains, inspect related Service informations and perform repair or diagnosis.
•  If vehicle not repaired, trouble shooting completed.
•  If vehicle not repaired or additional diagnostic information not available, replace PCM.