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2008 - MX-5 - Transmission/Transaxle

DTC P2764 [SJ6A-EL]



DTC P2764

TCC control solenoid circuit malfunction (short to ground/open circuit)

DETECTION CONDITION

  • Open or short circuit in TCC control solenoid signal system (while TCM monitors solenoid output voltage, the voltage that differs from the signal output by CPU in TCM is detected).

    Diagnostic support note:
  • The MIL illuminates if the TCM detects the above malfunction condition during the first drive cycle.

  • A PENDING CODE is not available.

  • FREEZE FRAME DATA is available.

  • The AT warning light illuminates.

  • The DTC is stored in the TCM memory.

POSSIBLE CAUSE

  • Open circuit between TCC control solenoid terminal B and TCM terminal 1Q

  • Open circuit between TCC control solenoid terminal A and TCM terminal 1D

  • Short to ground in wiring harness between TCC control solenoid terminal B and TCM terminal 1Q

  • Short to ground in wiring harness between TCC control solenoid terminal A and TCM terminal 1D

  • TCC control solenoid malfunction

  • Damaged connector between TCC control solenoid and TCM

  • TCM malfunction


Diagnostic procedure

STEP

INSPECTION

ACTION

1

VERIFY FREEZE FRAME DATA HAS BEEN RECORDED
  • Has the FREEZE FRAME DATA been recorded?

Yes

Go to the next step.

No

Record the FREEZE FRAME DATA on the repair order, then 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 TCM CONNECTOR FOR POOR CONNECTION
  • Turn the ignition switch to the LOCK position.

  • Disconnect the TCM connector.

  • Inspect for poor connection at TCM terminals 1Q and 1D (such as damaged/pulled-out pins, corrosion).

  • Are terminals normal?

Yes

Go to the next step.

No

Repair or replace the connector and/or terminal, then go to Step 13.

4

INSPECT RESISTANCE OF TCC CONTROL SOLENOID CIRCUIT

Yes

Go to the next step.

No

Go to go to Step 7.

5

INSPECT TCC CONTROL SOLENOID CIRCUIT FOR SHORT TO GROUND
  • Disconnect the couple component connector.

  • Inspect for continuity between TCM terminals (wiring harness-side) and body ground.

    • Terminal 1Q and body ground

    • Terminal 1D and body ground

  • Is there continuity?

Yes

Go to the next step.

No

Repair or replace the wiring harness for short to ground, then go to Step 13.

6

INSPECT TCC CONTROL SOLENOID CIRCUIT FOR SHORT TO GROUND
  • Inspect for continuity between couple component terminals (wiring harness-side) and body ground.

    • Terminal H and body ground

    • Terminal G and body ground

  • Is there continuity?

Yes

Go to go to Step 13.

No

Repair or replace the couple component, then go to the next step.

7

INSPECT COUPLE COMPONENT CONNECTOR FOR POOR CONNECTION
  • Turn the ignition switch to the LOCK position.

  • Disconnect the couple component connector.

  • Inspect for poor connection at couple component terminals H and G (such as damaged/pulled-out pins, corrosion).

  • Are terminals normal?

Yes

Go to the next step.

No

Repair or replace the connector and/or terminal, then go to Step 13.

8

INSPECT RESISTANCE OF TCC CONTROL SOLENOID CIRCUIT
  • Inspect the resistance between couple component (transmission case side) terminals H and G.

  • Is the resistance within 5.0—5.6 ohms?

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

Yes

Go to the next step.

No

Go to Step 10.

9

INSPECT TCC CONTROL SOLENOID CIRCUIT FOR OPEN CIRCUIT
  • Inspect for continuity between TCM terminals and couple component terminals (wiring harness-side).

    • Terminal 1Q and terminal H

    • Terminal 1D and terminal G

  • Is there continuity?

Yes

Go to Step 13.

No

Repair or replace the wiring harness for open circuit, go to Step 13.

10

INSPECT TCC CONTROL SOLENOID CONNECTOR FOR POOR CONNECTION
  • Disconnect the TCC control solenoid connector.

  • Inspect for poor connection at TCC control solenoid terminals A and B (such as damaged/pulled-out pins, corrosion).

  • Are terminals normal?

Yes

Go to the next step.

No

Repair or replace the connector and/or terminal, then go to Step 13.

11

INSPECT TCC CONTROL SOLENOID

Yes

Go to the next step.

No

Replace the control valve body, then go to Step 13.

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

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

12

INSPECT TCC CONTROL SOLENOID CIRCUIT FOR OPEN CIRCUIT
  • Inspect for continuity between couple component terminals and TCC control solenoid terminals (wiring harness-side).

    • Terminal H and terminal B

    • Terminal G and terminal A

  • Is there continuity?

Yes

Go to the next step.

No

Repair or replace the couple component, then go to the next step.

13

VERIFY TROUBLESHOOTING OF DTC P2764 COMPLETED
  • Make sure to reconnect all the disconnected connectors.

  • Clear the DTC from the memory using the M-MDS.

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

  • Is 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.

14

VERIFY AFTER REPAIR PROCEDURE
  • Are any DTCs present?

Yes

Go to the applicable DTC inspection.

(See DTC TABLE [SJ6A-EL].)

No

Troubleshooting completed.




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