Checking the Read Button on the Turn Signal Lamp Switch

Checking the read button on the turn signal lamp switch

Checking components
Activate the read button on the turn signal lamp switch. Read off the status.

Hint: If the read button status is OK the fault is not in the steering wheel module (SWM).





Was the status of the read button correct?

Yes - No Fault Found

No - Replacing the component

-------------------------------------------------

Replacing the component
Replace the turn signal lamp switch

Other information:
- To replace the turn signal lamp switch, see Turn signal switch, replacing, M58, M66, M66 AWD, AW50/51 AWD, AW55-50/51SN, M56 Turn Signal Switch, Replacing.

Select "Continue" when the fault has been remedied.

Continue - Checking components

-------------------------------------------------

Checking components
Activate the read button on the turn signal lamp switch. Read off the status.

Hint: If the read button status is OK, the fault is in the turn signal lamp switch.





Was the status of the read button correct?

Yes - Fault Found

No - Replacing the component

-------------------------------------------------

Replacing the component
Try replacing the steering wheel module (SWM).

Caution! A new control module is delivered without software. The control module must be programmed in order to function after replacement.

Other information:
- To replace and program the steering wheel module (SWM), see Steering wheel module (SWM), replacing Service and Repair.





Was a fault detected?

Yes - Fault Found

No - No Fault Found

-------------------------------------------------