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2008 - MX-5 - Transmission/Transaxle

NO.20 NOISE OCCURS AT IDLE WHEN VEHICLE IS STOPPED IN ALL POSITIONS/RANGES [SJ6A-EL]



20

Noise occurs at idle when vehicle is stopped in all positions/ranges

DESCRIPTION

  • Transmission is noisy in all positions and ranges when the vehicle is idling.

POSSIBLE CAUSE

  • The malfunction is in the pressure solenoid or oil pump which causes a high-pitched noise to be emitted from the transmission at idle.

    NOTE:

    • If a noise is emitted during shifting only, the malfunction is in the C1 clutch, C2 clutch, C3 clutch, B1 brake, B2 brake, B3 brake, or B4 brake.

    • 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 Transmission On-Board Diagnostic and Automatic Transmission Basic Inspection are conducted. (See BASIC INSPECTION [SJ6A-EL].)


Diagnostic procedure

STEP

INSPECTION

ACTION

1

  • Inspect engine condition.

  • Is there any engine concern (e.g. Rough idle, vibration)?

Yes

Go to appropriate symptom troubleshooting.

(See SYMPTOM DIAGNOSTIC INDEX [LF].)

No

Replace basic inspection and repair or replace any malfunctioning parts according to the inspection result

2

  • Verify test results.

    • If normal, return to the diagnostic index to service any additional symptoms.

    • If malfunction remains, inspect the related Service Bulletins and/or On-line Repair Information and perform repair or diagnosis.

      • If the vehicle is repaired, troubleshooting completed.

      • If the vehicle is not repaired or additional diagnostic information is not available, replace the TCM.




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