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Home >> Volvo >> 1994 >> 940 Base, 4D Wagon, AW71 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Basic Diagnostic Procedures >> Ignition Checks >> MOTRONIC 1.8 >> Checking Ground Connections

Checking Ground Connections

  1. Turn ignition off. Remove fuse No. 24. Connect Breakout Box (999-3070) to ECU. See Figure. Connect ohmmeter between ground and terminals No. 19, 24, 26, 30 and 48. Resistance should be about zero ohms on all measurements.
  2. Check power unit ground connections under each power unit. Connect an ohmmeter between ground and terminal No. 4 on front power unit connector and then on rear power unit connector.
  3. Ohmmeter should indicate about zero ohms in both cases. If ohmmeter does not indicate about zero ohms in both cases, check connectors and wiring.
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