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 MANUALSBMW1996850CI (E31) V12-5379CC 5.4L SOHC (M73)REPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTDESCRIPTION AND OPERATIONDME M5.2 INPUTSDRIVEAWAY PROTECTION
1996 BMW 850Ci (E31) V12-5379cc 5.4L SOHC (M73)
Driveaway Protection
1996 BMW 850Ci (E31) V12-5379cc 5.4L SOHC (M73)SECTION Driveaway Protection
The drive away protection feature of the M5.2 is activated from the EWS II control module. The cancelling of the ignition and injection outputs by the DME remains the same.
The signal from the EWS control module is changed. The communication from the EWS II control module to the DME control modules is now a digital signal. The DME control modules each have a unique individual serial number (ISN). The ISN is copied from DME I and transferred to the EWS II control module. When EWS releases the DME from driveaway protection it sends the ISN to both DME control modules. DME I must recognize the ISN as valid before it cancels the drive away protection function.
DME I signals DME to cancel the driveaway protection over the CAN line.
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.