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

STEP

INSPECTION

ACTION

1

• 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 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

• 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 for resistance between TCM terminals 1Q and 1D (wiring harness-side).

• Is the resistance within 5.0—5.6 ohms?

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

Yes

Go to the next step.

No

Go to go to Step 7.

5

• 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 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

• 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 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 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

• 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 the TCC control solenoid.

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

• Is the TCC control solenoid normal?

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 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

• 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

• Perform the “After Repair Procedure”.

  (See AFTER REPAIR PROCEDURE [SJ6A-EL].)

• Are any DTCs present?

Yes

Go to the applicable DTC inspection.

(See DTC TABLE [SJ6A-EL].)

No

Troubleshooting completed.