DTC P0970:00

Shift solenoid F signal: Open/short circuit

DETECTION CONDITION

• Vehicle condition: TCM normal during engine rotation

• Status: Detects open circuit or short to ground in shift solenoid F signal system

• Period: Confirmed 5 times in 0.1 s or more

FAIL-SAFE FUNCTION

• Inhibits learning control.

• Inhibits the manual shift control.

• Inhibits direct mode.

• Inhibits AAS mode.

• Inhibits the TCC control and slip control.

• Inhibits 5GR and 6GR.

• Inhibits the neutral control.

• Inhibits the slope control.

• Sets to emergency mode.

POSSIBLE CAUSE

• TCM connector or terminal malfunction

• Coupler component connector or terminal malfunction

• Shift solenoid F connector or terminal malfunction

• Short to ground in wiring harness between shift solenoid F terminal B and TCM terminal 2Z

• Short to ground in wiring harness between shift solenoid F terminal A and TCM terminal 2O

• Open circuit between shift solenoid F terminal B and TCM terminal 2Z

• Open circuit between shift solenoid F terminal A and TCM terminal 2O

• Shift solenoid F malfunction

• TCM malfunction

STEP

INSPECTION

ACTION

1

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 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

• Switch the ignition off.

• Disconnect the TCM connector.

• Inspect for poor connection at TCM terminals 2Z and 2O (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 2Z and 2O (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 coupler component connector.

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

• Terminal 2Z and body ground

• Terminal 2O and body ground

• Is there continuity?

Yes

Go to the next step.

No

Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals:

• Shift solenoid F terminal B—TCM terminal 2Z

• Shift solenoid F terminal A—TCM terminal 2O

If there is a common connector:

• Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to ground.

• Repair or replace the malfunctioning part.

If there is no common connector:

• Repair or replace the wiring harness which has a short to ground.

Go to Step 13.

6

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

• Terminal F and body ground

• Terminal E and body ground

• Is there continuity?

Yes

Go to go to Step 13.

No

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

7

• Switch the ignition off.

• Disconnect the coupler component connector.

• Inspect for poor connection at coupler 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 coupler 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 coupler component terminals (wiring harness-side).

• Terminal 2Z and terminal F

• Terminal 2O and terminal E

• Is there continuity?

Yes

Go to Step 13.

No

Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals:

• TCM terminal 2Z—Coupler component terminal F

• TCM terminal 2O—Coupler component terminal E

If there is a common connector:

• Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for an open circuit.

• Repair or replace the malfunctioning part.

If there is no common connector:

• Repair or replace the wiring harness which has an open circuit.

Go to Step 13.

10

• Disconnect the shift solenoid F connector.

• Inspect for poor connection at shift solenoid F 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 shift solenoid F.

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

• Is the shift solenoid F 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 coupler component terminals and shift solenoid F terminals (wiring harness-side).

• Terminal F and terminal B

• Terminal E and terminal A

• Is there continuity?

Yes

Go to the next step.

No

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

13

• 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.

• 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.

14

• Clear the DTC using the M-MDS.

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

• Perform the DTC inspection using the M-MDS.

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

• Are any DTCs present?

Yes

Go to the applicable DTC inspection.

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

No

DTC troubleshooting completed.