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Circuit/System Testing

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  1. Ignition OFF, disconnect the harness connector X2 at the SDGM.
  2. Verify less than 0.5 volts between the wake up signal circuit terminal 19 and ground.
    • If greater than the specified range, test the circuit for a short to voltage. If the circuit tests normal, replace the BCM.
  3. Ignition ON, verify B+ between the communication enable signal circuit terminal 16 and ground.
    • If less than the specified value, test the circuit for an open/high resistance. If the circuit tests normal, replace the BCM.
  4. If all circuits test normal, replace the SDGM.
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