Transmission Fluid Temperature Sensor, Checking

Transmission Fluid Temperature Sensor, Checking

Recommended special tools and equipment
- V.A.G1526 multimeter or V.A.G1715 multimeter
- V.A.G1594 connector test kit
- Wiring diagram

Test requirements







- Fuses on E-box in engine compartment, left side, must be OK:

NOTE: Fuses on this fuse holder are labelled "SB" in the wiring diagram.

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


Test sequence
Observe safety precautions.
Observe rules for cleanliness.







- Disconnect 8-pin connector -B- on transmission.
- 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). Diagnostic Mode 04 - Erase DTC Memory
- Generate readiness code. Monitors, Trips, Drive Cycles and Readiness Codes

If harness connector is OK:
- Check resistance of Transmission Fluid Temperature Sensor -G93-.

Check sensor resistance.
- Check resistance of Transmission Fluid Temperature Sensor -G93- between terminals 1 and 2 at connector to sensor:

ATF temperature Specified value
-30 degrees C approx. 37.0 to 51.0 k Ohms
10 degrees C approx. 5.0 to 8.0 k Ohms
25 degrees C approx. 3.0 to 5.0 k Ohms
110 degrees C approx. 230.0 to 265.0 Ohms
145 degrees C approx. 100.0 to 120.0 Ohms

If one of the specified values is not obtained:
- Replace Transmission Fluid Temperature Sensor -G93-:
- Erase DTC memory of Transmission Control Module (TCM). Diagnostic Mode 04 - Erase DTC Memory
- Generate readiness code. Monitors, Trips, Drive Cycles and Readiness Codes

If specified values are obtained:
- Check wires to Transmission Control Module (TCM) according to wiring diagram.

Checking wires to Transmission Control Module (TCM)
- Connect test box to control module wiring harness. Test Box, Connecting For Wiring Test







- Check wires between test box and 8-pin connector to Transmission Control Module (TCM) for open circuit according to wiring diagram.

Terminal 1 + socket 45
Terminal 2 + socket 8

Wire resistance: max. 3.0 Ohms
- Check wires for short circuit to each other.


Specified value: Infinity Ohms

If no malfunctions are detected in the wires and the resistance values are OK:
- Replace Transmission Control Module (TCM) -J217-.