Q45 V8-4.5L (VK45DE) (2002)
Alarm System Transponder: Description and Operation
ELECTRONIC KEY SYSTEM / Component Parts And Harness Connector Location
Diagnostic System Diagram
Electronic Key System
Every electronic key (including transponder) has its own key ID No. However, only an electronic key with the key ID registered in the NATS IMMU and
ECM can turn ON while inserted in the ignition key cylinder, allowing the engine to start.
An ignition key (electronic key) with straight contour is adopted to prevent the electronic key from vehicle theft by abuse of duplicated key etc.
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If the batteries for the vehicle and handheld transmitter are discharged, using the emergency key integrated into the electronic key, the
driver/passenger doors and trunk lid can be operated for open/close, and the steering wheel lock can be unlocked.
NOTE: The engine cannot be started with an emergency key.