Camshaft Position (CMP) Sensor/Hall Sensor
- Remove coil secondary wire and attach to ground. Disconnect CMP sensor harness connector at distributor. Using an LED Test Light (US 1115), check for voltage between outer terminals of connector. See Fig 1
and Figure
. With ignition on, light should be on. If light is on, go to next step. If light is not on, check wiring for short or open circuit. If wiring is okay, replace ignition control unit.
- Reconnect CMP sensor harness connector. Pull back CMP sensor boot to expose contact terminals. Connect LED test light probe to center contact and battery positive terminal. See Fig 1
. Observe test light while cranking engine. If test light blinks, CMP sensor is okay. If light does not blink, replace CMP sensor.
Courtesy of VOLKSWAGEN UNITED STATES, INC.