check engine light AUDI A4 1997 B5 / 1.G APB Engine Valve Gear Service Workshop Manual

15-71

- Disconnect connector from solenoid valve.

If specified value is not obtained:
Checking voltage supply - Connect multimeter at valve for resistance measurement.

Specified value: 10 ... 18
- Replace valve.
- Disconnect connector from solenoid valve.

If LED does not light: - Connect VAG 1527B voltage tester as follows:Harness connector
terminal
Measure to
1 Engine Ground (GND)
- Operate starter briefly.

LED must light.
- Perform following tests marked with dots:
Check fuse of solenoid valves for camshaft adjustment.
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