Fiber Optic Light Conductor Cable:The fiber optic cables carry the light to their respec-
tive light output modules at each exterior door handle.
Installation Note:The bending radius of the fiber optic cable should be less than 20mm
when installing.
Light Output Modules: The exterior door handle frames have an additional mount to
accept the light output module.
The light output modules carry the light from the conductor cables to the exterior door han-
dle recess as well as casting a soft exterior light on the outside floor area.
Principle of Operation
Lights ON:
The exterior visual entry aid lighting is activated “on” when the vehicle interior
lights are activated “on” automatically by the GM.
Lights OFF:
Immediately after KL 15 recognition (immediate off - no soft off function). Soft
off after a short delay once all doors are closed.
After a maximum of 20 seconds “on” time, the control module switches exterior visual entry
aid lighting off regardless of interior light status.
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Central Body Electronics ZKE III
615200131.eps
General Functions of ZKE III
Consumer Cut Off
The Consumer Cut Off function interrupts battery voltage to circuits preventing inadvertent
battery drain if one of these consumers were to remain activated. Circuits controlled by
consumer cut off will be switched off as the GM enters into the sleep mode.
For example, the interior lights are connected to the consumer cut out circuit (KL 30) and
can remain on if one of the control switches are left on. The consumer cut off will deacti-
vate KL 30 to the interior lighting after 16 minutes (or with the DISplus/MoDIC).
The following circuits are con-
trolled by consumer cut off:
• Map/Reading Lights
• Glove Box/Luggage Compart-
ment Lights
• Transmission Range Indicator
Light
• Overload Protection Relay for
- Power Seat Motors
- Steering Column Motors
Overload Protection
The seat and steering column motors receive
operating power through the consumer cutoff/
overload protection relay module. The consumer
cutoff signal from the GM signals the relay to
maintain operating power to the consumers.
If the relay module detects an increase in amper-
age (overload) the relay will open. The relay mod-
ule (K-72) is located in the electrical carrier
behind the glove box. The relay is reset by
switching the ignition “off” for 16 minutes, dis-
connecting the relay or the DISplus/ MoDIC.
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Central Body Electronics ZKE III
E38 Shown
Overload
Protection Relay
Module
