RA00004630302Z 3.2 - General: Control Module/Warning Lamps For Differential Locks

RA00004630302Z 3.2 - General: Control Module/warning Lamps For Differential Locks

Control module for differential locks

Task





1 Transfer case differential lock
2 Rear axle differential lock
3 Front axle differential lock
4 Switch-on indicator lamps (yellow)
5 Function indicator lamps (red)

When actuated it activates the respectively selected differential lock:
^ Front axle (VA)
^ Transfer case (VG)
^ Rear axle (HA)

Indicates the respectively switched condition by means of:
^ Indicator lamps
^ Switch-on indicator lamp (yellow = selected)
^ Function Indicator lamp (red = engaged)

Design/function

to 02/94
^ 3 Rocker switch
^ Illumination and indicator lamps in bulb design
^ Load relay and time limit relay separately installed

The power supply is via fuse F10 (terminal 30) as well as via fuse F13 (terminal 15).

When the ignition is switched off (terminal 15) the electronics in the time limit relay are actuated. This means that the time limit relay provides voltage to the control module of the differential lock for approx. a further 30 sec. and the locked condition remains maintained for this time period (time delay).

as from 03/94
^ 3 Touch contact switch
^ Illumination and indicator lamps in LED design1)
^ Integrated electrical system and electronics (incl. delay switching)

1) cannot be replaced separately

The control module contains the entire control electrical system and electronics incl. the time delay.

The voltage supply of terminal 30 and terminal 15 is from the relay.

Overvoltage protection (K1/1 diesel or K1/2 gasoline engine).

When the ignition is switched off (terminal 15) the time delay is actuated. This means that for approx. a further 30 sec. the locked condition remains maintained.

Arrangement

The control module is arranged in the middle console.

Warning lamp for differential locks





6 Warning lamp

Note:
The warning lamp is already in use in cars for the following systems:

^ ASD, 4MATIC, ASR, ETS, ESP

Task
^ Indicates that at least one differential lock is selected.
^ Indicates that there is still one or several differential locks engaged.
^ Reminder for the driver to play greater attention
^ Additionally warns the driver that the anti-lock braking system (ABS) has been switched off by the differential lock system and is therefore not operation.

Function

The warning lamp is actuated by the control module when selecting the differential locks.

Arrangement

The warning lamp integrated in the instrument cluster.