Transmission Temperature Sensor/Switch: Testing and Inspection

Transmission Fluid Temperature Sensor, Checking

Special tools, testers and auxiliary items required

• Multimeter

• Wiring diagram

Requirements

• The Transmission Fluid Temperature Sensor (G93) fuse 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

- Disconnect the Transmission Fluid Temperature Sensor (G93) electrical harness connector - 3 -.





- 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 resistance

- Using a multimeter, check the Transmission Fluid Temperature Sensor (G93) terminals 1 to 2 for resistance.









If any of the specified values are not obtained:

- Replace the Transmission Fluid Temperature Sensor (G93).

If the specified values are obtained:

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 Transmission Fluid Temperature Sensor (G93) 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 specified value 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 is found in the wiring and the resistance was not OK:

- Replace the Transmission Fluid Temperature Sensor (G93).

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

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

Final procedures

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

2. If necessary, erase DTC memory of the Transmission Control Module (TCM) (J217). --> [ Diagnostic Mode 04 - Erase DTC Memory ] Clearing Diagnostic Trouble Codes.

3. Generate readiness code. --> [ Readiness Code ] Monitors, Trips, Drive Cycles and Readiness Codes.