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Home >> BMW >> 1988 >> 535is Standard >> Repair and Diagnosis >> Engine Performance >> System >> MOTRONIC CEC System >> Testing >> Test 1: Fuel Pressure >> No Fuel Pressure
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No Fuel Pressure

  1. Check fuel supply to fuel pump(s). Repair if necessary. If fuel supply is okay, check fuel pump(s) fuse and replace if defective. If fuse is okay, unplug electrical connector from fuel pump.
  2. Connect volt/ohmmeter between 2 wires in connector and start engine. Volt/ohmmeter should read battery voltage. If voltage is correct, replace fuel pump(s). If voltage reading is incorrect, check pump(s) power and ground circuits. Repair circuits as necessary.
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