Signal From Coolant Temperature Sender -G2-, Checking

If there is a malfunction in the coolant temperature display at the instrument cluster, check for the signal at the instrument cluster.
- Connect VAS5051 tester or VAG1551 scan tool.
- Read memory.
- Select display group 003.
- If the temperature is displayed in the diagnostic unit V.A.G 1551 but not in the instrument cluster, the instrument cluster is defect and must be replaced.
- If no coolant temperature is displayed in the diagnostics unit V.A.G 1551, check for the signal at the multi plug connector at the instrument cluster.
- Instrument cluster removal, refer to "Instrument Cluster, Removing and Installing (M.Y.2000>)" Service and Repair
- Connect the test box V.A.G 1598 with the adapter V.A.G 1598/25 to the 32-pin connector.
- Use the multimeter V.A.G 1526 between terminal 8 and terminal 7 (sensor ground) and measure the resistance.

Base value:
- Coolant temperature 90 °C: approx. 110 Ohm
- Coolant temperature 120 °C: approx. 50 Ohm

If the base value is not achieved, check the harness connectors to the sender for the coolant temperature -G2-.
- Check wire connection according to wiring diagram.

If the wire connections are ok, replace coolant temperature sensor -G2-.