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2008 - MX-5 - Transmission/Transaxle

NO.5 NO CREEP AT ALL [SJ6A-EL]



5

No creep at all

DESCRIPTION

  • Vehicle does not move in D range and R position when idling on a flat paved road.

POSSIBLE CAUSE

  • Either engine output low or there is clutch slippage.

    • Clutch burnt (C1 clutch, C4 clutch)

      • Line pressure low

      • Shift solenoid B malfunction

      • Shift solenoid C malfunction

      • Shift solenoid E malfunction

      • Line pressure control solenoid malfunction

      • Shift solenoid G malfunction

      • Body GND malfunction

      • Control valve body malfunction

    • Transmission fixed in 4GR or 5GR (Operation of fail-safe function)

      • Short or open circuit in wiring harness

      • Poor connection of connector

      • Malfunction of electronic parts of output and input system

    • There is no engine torque

      • Torque converter malfunction

    • Foreign material or water mixed in ATF

    • Excessive or low amount of ATF

    • TCM malfunction

NOTE:

  • 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

  • Does the vehicle creep in P and/or N position?

Yes

Inspect or adjust the selector lever.

(See SELECTOR LEVER INSPECTION.)

No

Go to the next step.

2

  • Stop the engine.

  • Inspect following solenoid.

    (See SOLENOID VALVE INSPECTION [SJ6A-EL].)

    • Shift solenoid B

    • Shift solenoid C

    • Shift solenoid E

    • Shift solenoid G

    • Line pressure control solenoid

  • Are these solenoids normal?

Yes

Go to the next step.

No

Inspect the coupler component.

If normal, replace the control valve body.

(See CONTROL VALVE BODY REMOVAL [SJ6A-EL].)

(See CONTROL VALVE BODY INSTALLATION [SJ6A-EL].)

3

Yes

Inspect the ATF condition.

No

Replace the torque converter.

4

  • 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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