General Functions of ZKE III

GENERAL FUNCTIONS OF ZKE III

CONSUMER CUT OFF







The interior lights are connected to the consumer cut out circuit. These consumers are connected to KL 30 and can remain on if one of the control switches are left on. This would prevent the ZKE from going into the sleep mode. However, the consumer cut off will switch K 30, to the interior lighting, off after 16 minutes.

OVERLOAD PROTECTION
The seat and steering column motors are provided operating power through the consumer cutoff I overload protection relay module as on the E38. The consumer cutoff signal from the GM signals the relay to maintain operating power to the consumers.

If an overload condition exists, the relay module detects the increase in amperage and opens the relay. The relay module is located in the electrical carrier forward of the glove box.

SLEEP MODE
To lower the constant battery draw when the vehicle is parked, The complete ZKE system will go into the "Sleep Mode" 16 minutes after the ignition has been switched off and no further ZKE function is active.

Approximate X5 Battery draw: - Ignition switch off = approx 750 mA.
- One minute after = approx. 560 mA.
- After 16 minutes (sleep mode) = approx. 18 mA.

All modules in the ZKE system will go into the sleep mode. The P-Bus remains active, however no data transfer takes place until a wake-up request is received. The general module, door modules or keyless remote module can wake the system up and put the ZKE back on line. The K-Bus is not active in the sleep mode, however the GM III of Remote Entry Module can put the K-Bus back on-line with a wake-up request.







SLEEP MODE CRITERIA: KL R, 15 OFF and no further function activated for 16 minutes.

WAKE UP CRITERIA: KL R or 15 "ON" or a change in one of the signal states listed below.