Checking activation
- Connect voltage tester e.g. V.A.G 1527 B with measuring probes and connector adapters from V.A.G 1594 A between terminal 2 (CMP sensor signal) and terminal 1 (B+); the harness connector remains connected.NOTE: Connector socket numbers are shown on the rear side of the connector.
- Operate starter for a few seconds.
- LED must blink.
NOTE: Voltage testers do not go out completely during low current pick-up between activations by the ECM, but rather continue to glow a little and then get significantly brighter during activation. - Switch ignition off.
If LED does not blink:
Fig 1: Connecting Voltage Tester VAG 1527 B Between Terminal 2 (CMP Sensor Signal) And Terminal 1 (B+)