With Manufacturer's Scan Tool

Glow plug system, checking

Special tools, testers and auxiliary items required






- Multimeter V.A.G. 1526A






- Adapter set V.A.G. 1594A

Requirements

- Glow plug strip fuse in battery fuse holder OK
- Battery voltage must be at least 11.5 V.
- All electrical consumers, e.g. lights and rear window defogger, must be switched off.
- Diesel Direct Fuel Injection (DFI) Engine Control Module (ECM) -J248- OK

Work sequence

- Disconnect connector on Engine Coolant Temperature (ECT) sensor -G62-.

Note: Disconnecting the sensor simulates the engine condition "cold" and when switching the ignition on the relevant glow period is initiated.

- Disconnect glow plug connector.
- Connect multimeter to measure voltage between a glow plug connector and vehicle ground.
- Switch on ignition for approximately 20 seconds. Approx. battery voltage must be displayed.
- If no voltage is present.
- Refer to Electrical Wiring Diagrams