Transmission Temperature Sensor/Switch: Testing and Inspection
Transmission Fluid Temperature Sensor, Checking
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
Requirements
- Respective fuses must be OK:
- Battery voltage must be at least 11.5 volts.
- All electrical consumers such as, lights and rear window defroster must be switched off.
- Parking brake must be engaged.
- Selector lever must be in -P- position.
- Ground (GND) connections to transmission must be OK.
- Ignition switched off.
Test Sequence
- Disconnect 16-pin harness connector -2-.
Observe safety precautions.
- Check harness connector for contact corrosion and ingress of water.
If harness connector is not OK:
- Repair malfunction.
- Erase DTC memory of Transmission Control Module (TCM), Diagnostic mode 4: Reset/erase diagnostic data. Diagnostic Mode 4: Reset/Erase Diagnostic Data
- 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 sensor resistance between terminals 13 + 14 at 16-pin connector to transmission:
ATF temperature Specified value kOhms
approx. 20 degrees C 0.8
approx. 60 degrees C 1.3
approx. 120 degrees C 1.9
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 4: Reset/erase diagnostic data. Diagnostic Mode 4: Reset/Erase Diagnostic Data
- 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 Transmission Control Module (TCM) wiring harness, connect test box for wiring test. Test Box, Connecting For Wiring Test
- Check wires between test box and 16-pin connector to Transmission Control Module (TCM) for open circuit according to wiring diagram.
Terminal 13 + socket 22
Terminal 14 + socket 21
Wire resistance: max. 1.5 Ohms
- Check wires for short circuit to each other.
Specified value: Infinite Ohms
If no malfunctions are found in wires:
- Replace Transmission Control Module (TCM) -J217-.