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Home >> Hummer >> 2008 >> H3 Base, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 165 (Supplemental Inflatable Restraint System) >> Diagnostic Information and Procedures >> DTC B1370 >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2008 Cadillac STS. 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 component/connector.
    • The SDM module
    • The SDM wiring harness connector
  1. Ignition OFF, remove the Air Bag fuse from the right rear fuse center. Ignition ON, engine OFF test the voltage from the supply voltage side of the AIR BAG ignition 1 fuse to a ground with a DMM. The voltage should read 9-16 volts.
  2. Remove the SDM connector, refer to Inflatable Restraint Sensing and Diagnostic Module Replacement  for connector location.
  3. With the Air Bag fuse remove test the ignition 1 voltage circuit between the rear fuse center and the SDM for a short to voltage or an open. Verify that a short to voltage or an open does not exist.
    • If any of the above conditions are found make the appropriate repair.
  4. If all circuit test normal then replace the SDM.
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