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Home >> Volvo >> 1993 >> 940 Base, 4D Sedan, AW70 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Basic Testing >> Fuel System >> Fuel Pump Circuit
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Fuel Pump Circuit

  1. Remove fuel injection system relay. Check voltage at terminal No. 30. See Figure and Figure . If battery voltage does not exist, repair wiring between relay connector and battery.
  2. Connect jumper wire between terminals No. 30 and 87/2 of fuel injection system relay connector. Fuel pump should run. If fuel pump does not run, check wiring between pump and relay. Also check wiring between terminals No. 87/1 and 85 for continuity. Repair as necessary.
NOTE: ECU terminal identifications are marked on unit or connector.
CAUTION: Ignition must be off when connecting or disconnecting ECU connector.
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