With Manufacturer's Scan Tool

Diesel Glow Plug System, Checking

Special tools
- Fluke 83 multimeter
- VW 1594 Adaptor kit

Checking conditions
- Battery voltage 11.5 Volts minimum
- Ignition switched OFF
- Diesel direct injection system Engine Control Module J248 OK
- S163 Glow plug strip fuse OK
- Production number on reverse side of glow plug relay must be: "180"

Checking sequence







- Disconnect harness connector from Engine Coolant Temperature Sensor -G62- -arrow-.


NOTE: Disconnecting -G62- simulates "engine cold" condition. Switching ON ignition initiates normal glow period.


- Disconnect glow plug harness connectors from glow plugs.
- Switch ON ignition.
- Switch Fluke 83 multimeter to 20 Volt range.
- Connect multimeter between cyl 1 glow plug harness connector and Ground then repeat this checking sequence for cylinders 2, 3 and 4.
Specification: Battery voltage for approx. 20 secs.

If no voltage present
- Erase DTC memory. Refer to "Displaying and Reading Trouble Codes/With Manufacturers Scan Tool/DTC Memory Checking and Erasing", Testing and Inspection
- Set the Readiness code. Refer to "Monitors, Trips and/or Drive Cycle (Readiness Codes)/Setting Readiness Code" Testing and Inspection