Combination Switch: Service and Repair

AR54.25-P-2800T Remove/Install Combination Switch







DANGER:
- Risk of explosion from explosive gas. Risk of poisoning and caustic burns from swallowing battery electrolyte. Risk of injury through burns to skin and eyes from battery acid or when handling damaged lead-acid batteries
- No fire, sparks, naked flames or smoking. Wear protective gloves, acid-resistant clothing and safety glasses. Pour battery electrolyte only into suitable and appropriately marked containers.

1 Disconnect ground cable of battery

NOTE: Do not connect quiescent current retention unit.

DANGER:
- Risk of injury.Injuries may result when performing testing or repair work on airbag or emergency tensioning retractor units.
- Store airbag unit with expulsion area on top, do not subject to temperatures above 100 degree C.When working on these units, disconnect the power supply.

2 Remove steering wheel.

CAUTION: Instructions for performing repair, body work and welding on vehicles with airbags and emergency tensioning retractors

3 Remove fanfare horns and airbag dock spring contact (A45)
4 Remove steering angle sensor (N49)
5 Remove cruise control pushbutton switch (S40)
6 Unscrew bolt (2) and detach steering column switch module (1) with combination switch (S4) from jacket tube
7 Unscrew bolts (3) and remove combination switch (S4) from steering column switch module (1)
8 Install in the reverse order
9 Perform basic programming
10 Read out DTC memory
11 Check for proper function