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HOMESERVICE MANUALSBMW1993740IL (E32/2) V8-3982CC 4.0L DOHC (M60)REPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSRELAYS AND MODULES - COMPUTERS AND CONTROL SYSTEMSENGINE CONTROL MODULETESTING AND INSPECTIONCOMPONENT TESTS AND GENERAL DIAGNOSTICSTR SIGNAL /EKP RELAY (ELECTRIC FUEL PUMP)
1993 BMW 740iL (E32/2) V8-3982cc 4.0L DOHC (M60)

TR Signal /EKP Relay (Electric Fuel Pump)

1993 BMW 740iL (E32/2) V8-3982cc 4.0L DOHC (M60)SECTION TR Signal /EKP Relay (Electric Fuel Pump)



Check function:
4-pole relay up to model '89
The EKP relay switches on as soon as the DME control unit sends a ground signal with overlaid engine speed signal (once per crankshaft revolution) at Pin 3.

7-pole relay as of model year '89
The EKP relay switches only during starting (via terminal 50) or when an ignition signal (terminal 1) is applied.

Possible causes:
- Wire to the EKP relay defective
- EKP relay or main relay defective
- Voltage supply for DME control unit, relay 1 or 2 defective
- No signals from the pulse generator - engine-speed/position
- Ignition output stage or ignition cell defective (model '89 only)
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.