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Circuit/System Testing

WARNING: This page is about a different car, the 2009 Cadillac DTS. However, it is still accessible from the selected car via links, so may be relevant.
IMPORTANT: When removing connectors inspect for damage or corrosion. Damage or corrosion in the following requires repair or replacement of the affected.
  • SDM
  • SDM wiring harness
  1. Ignition OFF, remove the IGN 1 AIR BAG fuse.
  2. Ignition ON, with a DMM, test for 9-16 V between the voltage supply side and ground.
    • If not the specified range, refer to DTC B1370 .
  3. Ignition OFF, disconnect the harness connector at the SDM.
  4. Ignition OFF, disconnect the X2 harness connector at the IP fuse block.
  5. Ignition OFF, test for less than 1 ohm between the ignition 1 voltage circuit terminal 32 and the IP fuse block terminal 10 (X2).
    • If greater then the specified range, test the circuit for an open/high resistance.
  6. Ignition ON, test for less than 1 volt between the ignition 1 voltage circuit terminal 32 and the IP fuse block terminal 10 (X2).
    • If greater then the specified value, test the circuit for a short to voltage.
  7. If all circuits test normal, replace the SDM.
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