Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSBMW2004760LI (E66) V12-6.0L (N73)REPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTDESCRIPTION AND OPERATIONENGINE MANAGEMENT ME9/MED9 (N62 ENGINE OR N73 ENGINE OR N62/TU ENGINE)CONVENIENT STARTAUTOMATIC START FUNCTION
2004 BMW 760Li (E66) V12-6.0L (N73)
Automatic Start Function
2004 BMW 760Li (E66) V12-6.0L (N73)SECTION Automatic Start Function
Automatic Start Function
Function
The automatic start is intended to prevent the driver from pressing the starter for longer than necessary. This prevents any unnecessary noise generation. Even under cold start conditions, the driver only needs to press the start button briefly; the DME takes on the rest of the task.
The DME is notified of the start request via the Car Access control module. The DME checks the start conditions engine speed, selector lever setting, EWS signal and activates the start-locking relay through a separate output. The starter motor is operated via this relay.
The start-locking relay is activated until the engine starts. If the engine does not start up, the start-locking relay is switched off after 20 seconds. If the engine is blocked, the start-locking relay is switched off after a few seconds.
Diagnosis
The following fault states are detected:
- Start request by Car Access control module while engine is running
- Sticking start-locking relay
- Defective final stage of the DME
- Short circuit in activation wire
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.