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HOMESERVICE MANUALSSAAB20099-7X 5.3IREPAIR AND DIAGNOSISBODY & FRAMEDOOR LOCKSVEHICLE ACCESSDIAGNOSTIC INFORMATION AND PROCEDURESDTC B3808CIRCUIT/SYSTEM TESTING
2009 Saab 9-7X 5.3i

Circuit/System Testing

2009 Saab 9-7X 5.3iSECTION Circuit/System Testing
  1. Ignition OFF, disconnect the LOCK relay.
  2. Ignition ON, verify that a test lamp illuminates between the B+ circuit terminal 86 and ground.
    • If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.
  3. Connect a test lamp between the B+ circuit terminal 86 and the control circuit terminal 85
  4. Command the rear doors to LOCK and UNLOCK with a scan tool. The test lamp should briefly illuminate when changing between the commanded states.
    • If the test lamp is always ON, test the control circuit for a short to ground. If the circuit tests normal, replace the BCM.
    • If the test lamp is always OFF, test the control circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the BCM.
  5. If all circuits test normal, test or replace the LOCK relay.
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Stop DIY work and contact a certified mechanic immediately if any of the following apply:

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  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.