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DTC P0757:00 [TCM (SJ6A-EL)]

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2016 – MX-5 – Transmission/Transaxle

DTC P0757:00 [TCM (SJ6A-EL)]

DTC P0757:00

Shift solenoid B: Stuck on

DETECTION CONDITION

  • Vehicle condition: Shift solenoid B signal is output while the TCM is normal with engine running

  • Status: Detects that shift solenoid B does not change from on

  • Period: Confirmed 1 time

FAIL-SAFE FUNCTION

  • Inhibits AAS mode.

  • Inhibits the slope control.

POSSIBLE CAUSE

  • Deteriorated ATF

  • ATF level low

  • Shift solenoid B stuck on

  • Control valve body malfunction

  • Automatic transmission malfunction

  • TCM malfunction

SYSTEM WIRING DIAGRAM

Not applicable

Diagnostic procedure

STEP

INSPECTION

ACTION

1

RECORD VEHICLE STATUS WHEN DTC WAS DETECTED TO UTILIZE WITH REPEATABILITY VERIFICATION

NOTE:

  • Recording can be facilitated using the screen capture of the PC function.

  • Record the freeze frame data/snap shot data.

Go to the next step.

2

VERIFY RELATED REPAIR INFORMATION AVAILABILITY

  • Verify related Service Bulletins and/or on-line repair information availability.

  • Is any related repair information available?

Yes

Perform repair or diagnosis according to the available repair information.

  • If the vehicle is not repaired, go to the next step.

No

Go to the next step.

3

INSPECT FOR DTC

Yes

Follow the applicable DTC inspection procedure, then go to the next step.

(See ON-BOARD DIAGNOSTIC SYSTEM DTC TABLE [TCM (SJ6A-EL)].)

No

Go to the next step.

4

INSPECT ATF CONDITION

Yes

Go to the next step.

No

Replace ATF, then go to Step 8.

(See AUTOMATIC TRANSMISSION FLUID (ATF) REPLACEMENT [SJ6A-EL].)

5

INSPECT ATF LEVEL

Yes

Go to the next step.

No

Add ATF to the specified level, then go to Step 8.

(See AUTOMATIC TRANSMISSION FLUID (ATF) LEVEL ADJUSTMENT [SJ6A-EL].)

6

INSPECT LINE PRESSURE

  • Are the line pressures within the specifications?

Yes

Go to the next step.

No

Inspect or replace the part according to the result of the line pressure test, then go to Step 8.

7

REPLACE CONTROL VALVE BODY AND VERIFY SAME DTC IS NOT PRESENT

Yes

Replace the AT, then go Step 9.

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

No

Go to the next step.

8

VERIFY SAME DTC IS NOT PRESENT

  • Always reconnect all disconnected connectors.

  • Clear the DTC using the M-MDS.

    (See ON-BOARD DIAGNOSTIC SYSTEM DTC INSPECTION [TCM (SJ6A-EL)].)

  • Perform the following procedure to ensure that the DTC has been resolved:

    • Start the engine.

    • Warm-up the engine and transmission.

    • Drive the vehicle in D position and make sure that the gears shift smoothly from 1GR to 6GR.

    • Gradually slow down and stop the vehicle.

    • Switch the ignition off.

    • Start the engine.

    • Drive the vehicle in D position and make sure that the gears shift smoothly from 1GR to 6GR.

  • Perform the DTC inspection using the M-MDS.

    (See ON-BOARD DIAGNOSTIC SYSTEM DTC INSPECTION [TCM (SJ6A-EL)].)

  • Is the same DTC present?

Yes

Replace the TCM, then go to the next step.

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

No

Go to the next step.

9

VERIFY DTC TROUBLESHOOTING COMPLETED

Yes

Go to the applicable DTC inspection.

(See ON-BOARD DIAGNOSTIC SYSTEM DTC TABLE [TCM (SJ6A-EL)].)

No

DTC troubleshooting completed.

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