Transmission Position Sensor/Switch: Testing and Inspection

Multi-Function Transmission Range Switch, Checking

Special tools, testers and auxiliary items required

• Multimeter

• Wiring diagram

Requirements

• The Multi-Function Transmission Range (TR) Switch (F125) fuse OK.

• The Control Module with indicator unit in the Instrument Cluster Control Module (J285) must be OK.

• The selector lever cable adjustment OK.

• The battery voltage must be at least 12.5 Volts.

• All electrical consumers must be switched off.

• The parking brake must be engaged.

• The elector lever must be in the "P" position.

• The Ground (GND) connections to transmission must be OK.

Test procedure

- Perform a preliminary check to verify the customers complaint. Refer to --> [ Preliminary Check ] Preliminary Check

Start diagnosis

Procedure

- Switch the ignition on.

- Depress the brake pedal and maintain depressed.

- Shift the selector lever into all positions.

The selector lever position must correspond to the display of the Control Module with the indicator unit in the Instrument Cluster Control Module (J285).

- Switch the ignition off.

If the selector lever position does not correspond to the display of the Control Module with indicator unit in the Instrument Cluster Control Module (J285):

- Disconnect the Multi-Function Transmission Range (TR) Switch (F125) electrical harness connector





- Check the electrical harness connector for damage, corrosion, loose or broken terminals.

- Repair any damage found to the electrical harness connector.

If the electrical harness connector is not OK:

- Repair the malfunction.

If the electrical harness connector is OK:

Checking wiring

If the manufacturers test box is being used. Perform the following step.

- Install the test box.

If the manufacturers test box is not being used. Perform the following step.

- Remove the Transmission Control Module (TCM) (J217).

- Using a multimeter, check the Multi-Function Transmission Range (TR) Switch (F125) electrical harness connector terminals to theTransmission Control Module (TCM) (J217) electrical harness connector T52 terminals for an open circuit.









Specified value: 1.5 ohms Max.

If the specification was not obtained:

- Check the wiring for a short circuit to each other, Battery (+), and Ground (GND).

- If necessary, repair the faulty wiring connection.

If no malfunction was found in the wiring and the resistance was not OK:

- Replace the Multi-Function Transmission Range (TR) Switch (F125).

If no malfunction is found in the wiring and the resistance was OK:

- Replace the Transmission Control Module (TCM) (J217).

Final procedures

After repair work, the following work steps must be performed in the following sequence:

1. Check the DTC memory. Refer to --> [ Diagnostic Mode 03 - Read DTC Memory ] Reading Diagnostic Trouble Codes.

2. If necessary, erase the DTC memory. Refer to --> [ Diagnostic Mode 04 - Erase DTC Memory ] Clearing Diagnostic Trouble Codes.

3. If the DTC memory was erased, generate readiness code. Refer to --> [ Readiness Code ] Monitors, Trips, Drive Cycles and Readiness Codes.

End of diagnosis