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Home >> Cadillac >> 2007 >> Escalade EXT >> Repair and Diagnosis >> External Pages >> Different car >> Section 922 (Data Communication System) >> Diagnostic Information and Procedures >> DTC U2105-U2199 >> Circuit/System Testing
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Circuit/System Testing

WARNING: This page is about a different car, the 2007 GMC Sierra and 2007 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the harness connector of the yaw rate sensor.
  2. Ignition ON, verify that a test lamp illuminates between the module voltage circuit and ground.
    • If the test lamp does not illuminate, test the circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the EBCM.
  3. Ignition OFF, test for less than 5 ohms of resistance between the module ground circuits and ground.
    • If greater than 5 ohm, test the ground circuit for an open/high resistance. If the circuit tests normal, replace the EBCM.
  4. If all circuits test normal, replace the yaw rate sensor.
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