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Home >> Saab >> 2006 >> 9-7X 5.3i >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - 5.3L - Troubleshooting >> Powertrain Relay Diagnosis >> Circuit/System Verification
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Circuit/System Verification

  1. With the ignition ON, engine OFF, command the powertrain relay ON and OFF several times using the scan tool output control function. You should either hear or feel the relay click with each command.
  2. With the ignition ON, engine OFF, probe both test points of each of the following fuses:
    • The ENG 1 fuse
    • The TAC fuse
    • The INJ A fuse
    • The INJ B fuse
    • The O2A fuse
    • The O2B fuse
    • The test lamp should illuminate on at least one test point of each fuse. If the test lamp does not illuminate, continue with Circuit/System Testing.
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