Function test
WARNING: This page does not describe the selected car, but rather 15 other vehicles, including the 2006 Volkswagen Golf, 2005 Volkswagen Jetta, 2005 Volkswagen Golf, 2004 Volkswagen Jetta, and 2004 Volkswagen Golf. However, it is still accessible from the selected car via links, so may be relevant.
- Connect diagnostic tester. Refer to Diagnostic tester, connecting .
- Switch ignition on.
- Under address word 33, select "Diagnostic mode 1: Checking measured values."
- Select the measuring value "PID 05: Coolant temperature".
- Check specified value of coolant temperature:
| PID | Diagnostic text | Specified value: | ||||
| 05: | Coolant temperature | approx. coolant temperature | ||||
If specified value is not obtained:
- End diagnosis and switch ignition off.
- Check wires according to wiring diagram. Refer to Checking wiring .
If specified value is obtained:
- Start engine and let run at idle.
- Check specified value of coolant temperature at idle:
| PID | Diagnostic text | Specified value: | ||||
| 05: | Coolant temperature | Temperature value must rise evenly | ||||
NOTE:
- The temperature increases in increments of 1.0 ° C.
- If the engine shows problems in certain temperature ranges and if the temperature does not climb uniformly, the temperature signal is intermittent and the sensor should be replaced.