Ignition Control Module: Service and Repair

WM 282020 Removing and installing bar ignition modules

Preliminary work

1. Switch ignition off and remove ignition key
2. Remove design cover on bar ignition modules on both sides. -> 108319 Removing and installing engine cover (design cover) Service and Repair

Removing bar ignition modules





Bar ignition modules and valve cover, cylinder bank 1 to 4









Bar ignition modules and valve cover, cylinder bank 5 to 8





Information

- The aluminium screws on the bar ignition modules are difficult to reach close to cylinders 4 and 8. Shorten the tool you are using as required.

- The tank vent lines and low-pressure and vacuum lines can be unclipped close to the torque support and cylinder 4 (see illustration) -4-.





Cable holder and lines

1. Remove electric plug connection for oxygen sensors in front of cylinder 8. Loosen cable plug from the holder. => Pulling off connector





Pulling off connector

2. Release and pull off cable plugs => Cable plugs for bar ignition modules. Remove screws from bar ignition modules and replace them (aluminium screws). => Fastening screw on bar ignition module





Cable plugs for bar ignition modules





Fastening screw on bar ignition module

3. Remove bar ignition modules. => Bar ignition module





Bar ignition module

3.1. Remove the bar ignition module for cylinder 3 by turning it under the torque support.
3.2. Remove the bar ignition module for cylinder 4 by turning it under the lines.
3.3. Remove the bar ignition module for cylinder 8 by turning it past the B+ line.





Bar ignition module for cylinder 8

Installing bar ignition modules

Information

The tightening specifications for the basic engine are stored centrally. -> 1001IN Tightening torques, tightening sequences, assembly overviews [1][2]Specifications. Tightening torques and assembly instructions for other affected assemblies (e.g. chassis, electrics, transmission or body) or for peripheral engine equipment can be found in the corresponding documents.

1. Fit aluminium screws on the bar ignition modules (use new aluminium screws) => Fastening screws on bar ignition modules. Fit cable plugs. => Cable plugs for bar ignition modules





Fastening screws on bar ignition modules





Cable plugs for bar ignition modules

2. Follow the instructions in reverse order for removal.

Subsequent work

1. Re-fit design cover for bar ignition modules. -> 108319 Removing and installing engine cover (design cover) Service and Repair