Transmission Fluid Temperature Sensor, checking: Notes

Recommended special tools and equipment 

• V.A.G 1526 multimeter or V.A.G 1715 multimeter
• V.A.G 1594 connector test kit
• Wiring diagram

Test requirements 

• Respective fuses must be OK:

Refer to Electrical Wiring Diagrams, Troubleshooting & Component Locations

• Battery voltage must be at least 11.5 volts.
• Selector lever must be in -P- position.
• Ground (GND) connections to transmission must be OK.
• All electrical consumers such as: lights and rear window defroster must be switched off.

• Parking brake must be engaged or else daylight driving lights will be switched on.
• Ignition switched off.

Test sequence 

• Disconnect 16-pin harness connector -2-.

Observe safety precautions. Refer to Safety precautions  .

• Check harness connector for contact corrosion and ingress of water.

If harness connector is not OK:

• Repair the malfunction.
• Erase DTC memory of Transmission Control Module (TCM). Refer to Diagnostic mode 4: Reset/erase diagnostic data 
• Generate readiness code. Refer to Readiness code, generating 

If harness connector is OK:

• Check resistance of Transmission Fluid Temperature Sensor -G93-. Refer to Check Sensor Resistance  .