Steering Column Electronic Systems Control Module

Steering Column Electronic Systems Control Module

The airbag spiral spring/return spring with slip ring (F138) and the steering angle sensor (G85) are integrated in the steering column electronics control module (J527).

Special tools, testers and auxiliary items required

• Feeler gauge

Removing

- If the control module was replaced, select the "Replace" function for the respective control module in "Guided Fault Finding" or "Guided Functions" using the Vehicle Diagnostic Tester.

- Select the function or path:






- Follow the instructions on the Vehicle Diagnostic Tester display.


Risk of damaging coil connector.

• Steering must be in center position (wheels in straight ahead position) when removing and installing coil connector with slip ring.

• Coil connector with slip ring is not to be turned following removal.

- Switch off ignition and remove ignition key.


Danger of unintended engine ignition.

Turn off the ignition and remove the ignition key from the vehicle interior for all work performed on the high voltage vehicle.

- Adjust steering wheel downward and to rear as far as possible, use entire adjustment range of steering column adjustment for this.

- Remove the driver airbag. Refer to Removal and Installation.

- Remove steering wheel.

- Remove steering column trim.

- Remove bolt - 1 -.






- Release the retaining hooks in the direction of the - arrows - carefully and remove the airbag spiral spring/return spring with slip ring - 2 - from the steering column switch module - 3 -.

- Release the electrical connectors on the airbag spiral spring/return spring with slip ring - 3 - by positioning the screwdriver at the retaining hooks - 2 - and - 4 - as illustrated and carefully releasing the connectors - 1 - and - 5 - in the direction of - arrow A -.






- Remove the airbag spiral spring/return spring with slip ring on the steering column switch module.

Installing

Install in reverse order of removal, observing the following:

- Make sure all retaining hooks and connectors are engaged securely.

- Install steering column trim.

- Install steering wheel.

- Install the driver airbag. Refer to Removal and Installation.

- Follow the prompts on the vehicle diagnostic tester display in the case of a new steering column electronics control module.