NO.20 NOISE OCCURS AT IDLE WHEN VEHICLE IS STOPPED IN ALL POSITIONS/RANGES

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NO.20 NOISE OCCURS AT IDLE WHEN VEHICLE IS STOPPED IN ALL POSITIONS/RANGES

B3E050319090W24

20 | Noise occurs at idle when vehicle is stopped in all positions/ranges
DESCRIPTION | • Transaxle is noisy in all positions and ranges when the 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 the troubleshooting steps, make sure that the Automatic Transaxle On-Board Diagnostic and Automatic Transaxle Basic Inspection are conducted.

Diagnostic procedure

STEP | INSPECTION | ACTION
--- | --- | ---
1 | Inspect engine condition. Is there any engine concern (i. e. rough idle)? | Yes | Go to appropriate symptom troubleshooting. (See Section F.)
No | Go to the next step.
2 | Does the noise stop when the solenoid connector is disconnected? | Yes | Go to the next step.
No | Overhaul the control valve body and repair or replace any malfunctioning parts. (See ATX workshop manual (FN4A-EL).) If any problem remains, overhaul the transaxle and repair or replace any malfunctioning parts. (See ATX workshop manual (FN4A-EL).)

3

Inspect the value at the following PCM PIDs using the WDS or equivalent. (See PCM INSPECTION [ZJ, Z6].)
(See PCM INSPECTION [LF].)
• TP
• OSS
• TSS
Are the PID values normal?

Yes

Go to the next step.

No | Repair or replace any malfunctioning parts.
4 | Disconnect the PCM connector. Is the resistance between the ground terminal at the PCM connector and the body ground less than 5.0 ohms? | Yes | Go to the next step.
No | Repair the open ground circuit. Reconnect the PCM.
5 | Inspect the LPS PID value. Is the LPS PID value normal? (See PCM INSPECTION [ZJ, Z6].) (See PCM INSPECTION [LF].) | Yes | Overhaul the control valve body and repair or replace any malfunctioning parts. (See ATX workshop manual (FN4A-EL).) If any problem remains, overhaul the transaxle and repair or replace any malfunctioning parts. (See ATX workshop manual (FN4A-EL).)
No | Repair or replace any malfunctioning parts.

6

• Verify the test results.

  - If normal, return to the diagnostic index to service any additional symptoms.
  - If the malfunction remains, inspect the related Service information and perform repair or diagnosis.

  • If the vehicle is repaired, troubleshooting is completed.
  • If the vehicle is not repaired or additional diagnostic information is not available, replace the PCM.