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Home >> Saab >> 1985 >> 900 S, 2D Hatchback, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Fuel Injection System - Turbo >> Testing >> System Relay Terminals

System Relay Terminals

NOTE: During normal operation, relay grounds are provided by the ECU. Ground connections are simulated within the following steps.
  1. Remove system/fuel pump relay holder from inside inner fender (near ECU). When holder is viewed looking forward, system relay is on left side of holder and fuel pump relay is on right side of holder.
  2. Using a voltmeter, check for battery voltage between system relay terminals 30 and 86. See Fig 1 . Check for continuity between system relay terminal 85 and ECU harness connector pin 21. Continuity should be present.
    Fig 1: Saab Fuel Pump And System Relay Terminals Do not test terminals of the relay itself.
    G35435
  3. Check for continuity between system relay pin 87B and ECU harness connector pin 2 (mass meter). Check for continuity between system relay terminal 87 and ECU harness connector pin 9. Check for continuity between system relay terminal 87 and fuel pump relay terminal 86. If all connections are okay, go to FUEL PUMP RELAY TERMINALS test.
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