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Home › Saab › 2009 › 9-7X 4.2i › Repair and Diagnosis › Electrical › Charging Systems › Engine Electrical › Diagnostic Information and Procedures › DTC B1492 › Circuit/System Testing

Circuit/System Testing

  1. Ignition OFF, disconnect the generator and GBCM harness connectors.
  2. Ignition ON and engine OFF, connect a test lamp to B+ and repeatedly probe the generator field duty cycle circuit terminal 2 X1, harness side while monitoring the scan tool ECM GEN-F Terminal Signal parameter. The parameter should change from 0 percent to greater than 95 percent.
    • If the parameter was not affected by the test lamp, test the circuit for a short to voltage, short to ground, or an open/high resistance.
  3. If the circuit tests normal, replace the GBCM
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