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2008 - MX-5 - Transmission/Transaxle

NO.1 VEHICLE DOES NOT MOVE IN D RANGE, OR IN R POSITION [SJ6A-EL]



1

Vehicle does not move in D range, or in R position

DESCRIPTION

  • Vehicle does not move when accelerator pedal is depressed.

POSSIBLE CAUSE

  • If the vehicle does not move in D range or R position, basically, the malfunction is in the AT. (Vehicle will move even with a malfunction in the TCM.) Since a malfunction is in the sensor circuit or output circuit is the cause of the malfunction in the AT, inspect the sensors, output circuit, and the related wiring harnesses.

    • Clutch slippage, worn (D range-C1 clutch, One-way clutch, R position-C3 clutch, B4 brake, One-way clutch)

      • Line pressure low

      • Shift solenoid A malfunction

      • Shift solenoid B malfunction

      • Shift solenoid C malfunction

      • Shift solenoid E malfunction

      • Line pressure control solenoid malfunction

      • Shift solenoid G malfunction

      • Sensor GND malfunction

      • Body GND malfunction

      • Control valve body malfunction

    • Selector lever malfunction

    • Parking mechanism not operating properly

    • Torque converter malfunction

    • TCM malfunction

    • Foreign materials or water mixed in ATF

    • Improper ATF amount

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

  • When the vehicle is stopped on a flat, level road and the engine off, does the vehicle move when pushed? (in D range or N, R positions with the brake pedal released)

Yes

Go to the next step.

No

Inspect for parking mechanism.

2

  • Start the engine.

  • Does vehicle move when selector lever in between N position and D range?

Yes

Inspect or adjust selector lever.

(See SELECTOR LEVER INSPECTION.)

No

Go to the next step.

3

  • Stop the engine.

  • Inspect following solenoid.

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

    • Shift solenoid C

    • Shift solenoid D

    • Shift solenoid E

    • Shift solenoid F

    • Line pressure control solenoid

  • Are these normal?

Yes

Replace the AT (clutch slippage, worn)

(See AUTOMATIC TRANSMISSION REMOVAL/INSTALLATION [SJ6A-EL].)

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].)

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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