Interior Lighting Module: Description and Operation

Interior Lights (ZKE/IB):

Functional Description:



Image Legend:
No. Abb. Description

1 GM General module
2 RM Relay module
4 TMFT Driver's door module
4 TMBT Passenger's door module
HL Glove compartment lights
IBL IB lamps(map reading lights, footwell lights)
E34 LB switch a) automatic b) OFF c) permanent light
K29 Interior light relay
K72 Load cut-out relay I
K73 Load cut-out relay II
S13 Passenger's door contact switch
S14 Driver's door contact switch
S27 Crash switch
S48 Driver's door handle contact
S79 Passenger's door handle contact
537 Glove compartment light switch
S113 Glove compartment light switch

General:

The interior lights system (LB) is controlled by the general module (GM) of the ZKE II. During automatic operation, the LB lamps are switched by means of an individual relay which is driven by the general module (GM). The relay switches ground to the LB switch. U-batt for the LB lamps is switched via the load cut-out facility.

Operation:

The interior lights (LB) can be switched by way of the interior light switch to "permanent light", "OFF" or "automatic" (control by the general module(GM)).

Permanent light: Ground is applied directly to the LB lamps via the LB switch.

OFF: LB switch prevents the LB lamps being switched on by the LB relay.

Automatic: General module: GM switches ground to the LB lamps via the LB relay. The ON time is influenced by door contacts, ignition switch position, central locking system, outer door handles and time sequences.

Automatic Mode:

Switch-on conditions:

Doors open (door contact active)

- Turn ignition switch to position 0 (terminal R on) when terminal 58 (parking light) is switched on or 32 s before they were switched on.
- Raise outside door handle (door handle switch) when terminal R OFF
- Signal from crash sensor

Switch-off conditions:

Immediate switch-off:
- Doors closed and switch on ignition (terminal R or 15)
- Doors closed and operate central locking system

Delayed switch-off:
- when LB switched on with outside door handle, deactivation after 8 seconds
- door opened longer than 16 mm
- central locking system unlocked via remote control, switch-off after 8 seconds
- close doors, switch-off after 20 seconds
- LB activated by terminal R off and terminal 58 on, switch-off after 16 seconds.

Repeat lockout:

The interior lights (B) can only be switched on 3 times in 16 minutes by way of the outside door handle, further operation of the door handle is ignored. The system is reset by opening, closing the driver's door.