Brad's Car Manuals: A 3rd party mirror of CHARM + LEMON car manuals
Home >> GMC >> 2013 >> Yukon Base, 4WD >> Repair and Diagnosis >> Engine Performance >> System >> Data Communication System >> Diagnostic Information and Procedures >> DTC U209A >> Circuit/System Testing

Circuit/System Testing

Download the full database via torrent (~1.1 TB)  |  Download Brad's custom LEMON patches
  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.
scientia non olet · About Brad's Car Manuals