DTC P0971

Shift solenoid F circuit malfunction (short to power)

DETECTION CONDITION

• Short circuit in shift solenoid F 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

• Short to power in wiring harness between shift solenoid F terminal B and TCM terminal 1Z

• Short to power in wiring harness between shift solenoid F terminal A and TCM terminal 1O

• Shift solenoid F malfunction

• Damaged connector between shift solenoid F 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 1Z and 1O (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 7.

4

• Turn the ignition switch to the ON position (engine off).

• Measure the voltage at TCM (wiring harness-side) terminals 1Z and 1O.

• Is there 0 V at the TCM wiring harness-side connector terminals?

Yes

Go to go to Step 7.

No

Go to the next step.

5

• Turn the ignition switch to the LOCK position.

• Disconnect the couple component connector.

• Turn the ignition switch to the ON position (engine off).

• Measure the voltage at TCM (wiring harness-side) terminals 1Z and 1O.

• Is there 0 V at the TCM wiring harness-side connector terminals?

Yes

Go to the next step.

No

Repair or replace the wiring harness (TCM—couple component connector) for short to power supply, then go to Step 7.

6

• Inspect the shift solenoid F.

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

• Is the shift solenoid F normal?

Yes

Repair or replace the wiring harness (couple component connector—shift solenoid F) for short to power supply, then go to the next step.

No

Replace the control valve body, then go to the next step.

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

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

7

• 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.

8

• 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.