Vehicle Speed Sensor (VSS), Checking
Vehicle Speed Sensor (VSS) Sensor (Vehicles With 01M Transmission), Checking
Recommended special tools and equipment
- VA.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.
- 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 or else day time driving lights will be switched on.
- Ground (GND) connections to transmission must be OK.
- Ignition switched off.
Test sequence
- Disconnect 3-pin harness connector to Vehicle Speed Sensor (VSS) -G68- (arrow).
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).
- Generate readiness code.
If harness connector is OK:
- Check resistance at 3-pin connector of Vehicle Speed Sensor (VSS) -G68-.
Check sensor resistance.
- Check sensor resistance between terminals 1 + 2 at connector to sensor.
Specified value: 700 to 900 Ohms
- Check sensor for short circuit between terminals 2 + 3 and 1 + 3.
Specified value: Infinite Ohms
If specified values are not obtained:
- Replace Vehicle Speed Sensor (VSS) -G68-.
- Erase DTC memory of Engine Control Module (ECM).
- Generate readiness code.
If no malfunction is found on sensor:
- 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.
- Check wires between test box and 3-pin connector to Transmission Control Module (TCM) for open circuit according to wiring diagram.
Terminal 1 + socket 65
Terminal 2 + socket 20
Terminal 3 + socket 43
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 Transmission Control Module (TCM) -J217-.