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Home >> Chevrolet >> 2004 >> Impala SS >> Repair and Diagnosis >> External Pages >> Different car >> Section 918 (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 2010 Chevrolet Malibu. However, it is still accessible from the selected car via links, so may be relevant.
IMPORTANT: When removing the connectors inspect for damage or corrosion. Damage or corrosion to the following requires repair or replacement of the affected component/connector:
  • SDM module
  • SDM wiring harness connector
  1. Ignition OFF, remove the IGN 1 AIR BAG fuse at the body control module (BCM).
  2. Ignition ON, with a DMM, test for 9-16 volts between the voltage supply side of the AIR BAG fuse and ground.
  3. Ignition OFF, disconnect the harness connector at the SDM.
  4. Ignition OFF, test for infinite resistance between the ignition 1 voltage circuit terminal 33 and ground.
    • If not the specified value, test the B+ circuit for a short to ground.
  5. Ignition ON, test for less than 1 volt between the ignition 1 voltage circuit terminal 33 and ground.
    • If greater than the specified range, test the B+ circuit for a short to voltage.
  6. Ignition OFF, test for less than 1 ohm between the ignition 1 voltage circuit terminal 33 and the AIR BAG fuse terminal A6 X3 at the BCM.
    • If greater than the specified range, test the B+ circuit for an open/high resistance.
  7. If all circuits test normal, replace the SDM.
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