Component Tests and General Diagnostics

Instrument Cluster Multi-pin Connectors, Checking


NOTE: Use VAG1598 test box and VAG1598/4 (26-pin), VAG1598/25 (32-pin) adapters.


Checking Vehicle Speed Sensor (VSS)
- 26-pin connector (blue), terminal 23

- Roll vehicle back and forth (approx. 1 meter)

Must read:
Voltage must rise from 0 volts to approx. 5 volts and then drop again to 0 volts.

Checking sender for fuel gauge
- 26-pin connector (yellow),terminal 25

Fuel tank half full: approx. 162 ohms
Fuel tank full: approx. 40 ohms
Fuel tank service: approx. 250 ohms

Checking Engine Coolant Temperature (ECT) sensor
- 26-pin connector (yellow), terminal 26

Coolant temperature 90 °C: approx. 110 ohms
Coolant temperature 120 °C: approx. 50 ohms