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 selector lever must be in the "P" position.

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

Procedure

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





- Check the electrical harness connector for damage, corrosion, lose 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 10 to 12 for resistance.









If any of the specified values are not obtained:

- Replace the Transmission Fluid Temperature Sensor (G93). Refer to 5 Spd. Automatic Transmission 01V Front and All Wheel Drive - Internal Components, Servicing, Rep Gr. 38, Removing and Replacing

If the specified values are obtained:

Checking wiring

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

Test Box 105 Pin (VAG1598/31)

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

- Remove the Transmission Control Module (TCM) ( J217). Refer to => [ Transmission Control Module, Replacing ] Transmission Control Module, Replacing.

- Using a multimeter, check the Transmission Fluid Temperature Sensor (G93) electrical harness connector terminals to the Transmission Control Module (TCM) (J217 ) electrical harness connector 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). Refer to 5 Spd. Automatic Transmission 01V Front and All Wheel Drive - Internal Components, Servicing, Rep Gr. 38, Removing and Replacing

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

- Replace the Transmission Control Module (TCM) ( J217). Refer to => [ Transmission Control Module, Replacing ] Transmission Control Module, Replacing.

Final procedures

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

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

3. Generate readiness code. => [ Readiness Code ] Readiness Code.