Q45 V8-4.5L (VK45DE) (2002)
Information Bus: Testing and Inspection
IVMS (LAN System)
Diagnostic Strategies
Fail-safe system operates when the signal from LCU is judged to be malfunctioning by BCM. If LCU sends no signal or an abnormal signal to BCM a
certain number of times in succession, the IVMS is set in a fail-safe condition. In the fail-safe condition, the electrical loads controlled by the switch on
the questionable LCU will be operated at fail-safe mode.
Description of On-Board Diagnostics
ON BOARD DIAGNOSTIC RESULTS INDICATOR LAMP
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Front map lamps and step lamps (all seats) act as the indicators for the on board diagnosis.
Diagnostic Items
Displaying & Reading Trouble Codes
CONSULT-II executes the following functions by combining data reception and command transmission via the communication line from BCM. IVMS
communication inspection, work support (only function setting of seats and steering wheel), self-diagnosis, data monitor, and active test display.
Diagnostic Items Description