Short Circuit

FRM3, AHM_01 And TMS Short Circuit Description

Dealing with short circuits in the footwell module FRM3, trailer module AHM_01 and in the TMS headlamp driver module

Monitoring in general: With the light switched on, a short circuit, a line break or the proper function of a circuit can be detected.

Detecting and checking a short circuit and making a fault memory entry takes approx. 10 seconds. Detecting and checking a line break and making a fault memory entry takes approx. 0.5 seconds.

Description of dealing with short circuits in the footwell module:
If a short circuit is detected, the output is switched off until the next light request. After repair, the light must be specifically switched off and switched on again so that the corresponding output is reactivated.

This operation can be repeated any number of times. This is why no footwell module may be replaced.

Description of dealing with short circuits in the trailer module:
If a short circuit is detected, the output is switched off until the next light request. After repair, the light must be specifically switched off and switched on again so that the corresponding output is reactivated.

This operation can be repeated 50 times, then the fault can no longer be deleted and the trailer module must be replaced.

Description of dealing with short circuits in the headlamp driver module:
If a short circuit is detected, the output is switched off. After repair, a terminal change (terminal 15 > terminal R > terminal 30 > terminal R > terminal 15) must be executed and the light switched on so that the corresponding output is reactivated.

This operation can be repeated any number of times. This is why no headlamp driver module may be replaced.