Transmission Vehicle Speed Sensor (VSS), Checking

Transmission Vehicle Speed Sensor (VSS) (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 connector from Transmission Vehicle Speed Sensor (VSS) -G38-.
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).
- Generate readiness code.

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.







- Check wires between test box and 2-pin connector to Transmission Control Module (TCM) for open circuit according to wiring diagram.

Terminal 1 + socket 66
Terminal 2 + socket 21

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 Vehicle Speed Sensor (VSS) -G38-
- Erase DTC memory of Transmission Control Module (TCM). Diagnostic mode 4: Reset/erase diagnostic data.
- Generate readiness code.