Advance, Checking

Ignition timing map, checking

Requirements
- engine oil temperature 80°C (176°F) minimum
- coolant temperature sender OK

- switch ignition OFF



- connect VAG 1367 engine tester using VAG 1367/8 inductive pickup

- start engine and let idle




- disconnect (blue) coolant temperature sensor (arrow) and record ignition timing at 2500 RPM




- re-connect coolant temperature sender harness connector (arrow) and check ignition timing at 2500 RPM
- ignition timing value must advance by 20° to 30° in addition to the previously recorded value

If same value is obtained (with re-connected sensor) as previously recorded value
- locate and eliminate open circuit in coolant temperature sensor wiring,

If open circuit is NOT found
- replace Digifant control unit