Transmission Fluid Temperature Sensor, Checking
Electrical components for regulating transmission, checking
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:
- Selector lever must be in -P- position.
- All electrical consumers such as, lights and rear window defroster must be switched off.
- Parking brake must be engaged.
- Ground (GND) connections to transmission must be OK.
- Ignition switched off.
- Check Transmission Fluid Temperature Sensor:
Vehicles with 01M transmission
Test sequence
- Disconnect 12-pin harness connector at transmission.
- Observe 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), 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.
- Re-connect 12-pin connector.
- Connect test box to control module wiring harness, connect test box for wiring test.
- Measure resistance of Transmission Fluid Temperature Sensor -G93- at test box between sockets 6 + 67:
ATF temperature Specified value
approx. 20°C 230.0 to 265.0 K ohms
approx. 60°C 37.0 to 51.0 K ohms
approx. 120°C 5.0 to 9.0 K ohms
If one of the specified values is not obtained:
- Check wires to Transmission Control Module (TCM) according to wiring diagram.
Checking wires to Transmission Control Module (TCM)
- Disconnect 12-pin harness connector at transmission.
- Check wires between test box and 12-pin connector to Transmission Control Module (TCM) for open circuit according to wiring diagram.
Terminal 1 + socket 67
Terminal 12 + socket 6
Wire resistance: max. 1.5 ohms
Check wires for short circuit to each other, to vehicle Ground (GND) and to B+.
Specified value: infinite ohms
If no malfunctions are found in wires:
- Replace circuit board with integrated Transmission Fluid Temperature Sensor -G93-:
- Erase DTC memory of Transmission Control Module (TCM), Diagnostic mode 4: Reset/erase diagnostic data.
- Generate readiness code. Monitors, Trips, Drive Cycles and Readiness Codes
Vehicles with 09A transmission
Note: Sensor is located inside the transmission and is not accessible from the outside.
Test sequence
- Disconnect 20-pin harness connector -2-.
- Observe 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), Diagnostic mode 4: Reset/erase diagnostic data.
- Generate readiness code. Monitors, Trips, Drive Cycles and Readiness Codes
If harness connector is OK:
- 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, connect test box for wiring test.
- Check for open circuits in wires between test box and 20-pin harness connector to Transmission Control Module (TCM) according to wiring diagram.
Terminal 7 + socket 33
Terminal 8 + socket 34
Wire resistance: max. 1.5 ohms
Check wires for short circuit to each other, to vehicle Ground (GND) and to B+.
Specified value: infinte ohms
If no malfunctions are found in wires:
- Check resistance of Transmission Fluid Temperature Sensor -G93-.
Check sensor resistance.
- Re-connect 20-pin connector.
- Measure resistance of Transmission Fluid Temperature Sensor -G93- at test box between sockets 33 +34:
ATF temperature Specified value
approx. 30°C 2.2 K ohms
approx. 70°C 0.5 K ohms
approx. 110°C 0.2 K ohms
- Check wires between test box sockets for short circuit to Ground (GND) and short circuit to B+ according to wiring diagram:
Socket 1 + 33
Socket 1 + 34
Socket 33 + 68
Socket 34 + 68
Specified value: infinte ohms
If specified values are obtained:
- Replace Transmission Control Module (TCM) -J217-1.
If one of the specified values is not obtained:
- Check internal wire in valve body:
If no malfunctions are found in the internal wires:
- Replace Transmission Fluid Temperature Sensor -G93-.
- Erase DTC memory of Transmission Control Module (TCM), Diagnostic mode 4: Reset/erase diagnostic data.
- Generate readiness code. Monitors, Trips, Drive Cycles and Readiness Codes