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Home >> Cadillac >> 2007 >> Escalade EXT >> Repair and Diagnosis >> External Pages >> Different car >> Section 1607 (Data Communication System) >> Diagnostic Information and Procedures >> DTC U1826 >> Circuit/System Testing
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Circuit/System Testing

WARNING: This page is about a different car, the 2010 GMC Sierra, 2010 GMC Cab & Chassis Sierra, 2010 Chevrolet Silverado, and 2010 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the harness connector at the Yaw and Lateral Accelerometer Sensor.
  2. Test for less than 5 Ω between the Yaw and Lateral Accelerometer Sensor ground circuit terminal 6 and ground.
    • If greater than the specified value, test the ground circuit for an open/high resistance.
  3. Ignition ON, verify that a test lamp illuminates between the Yaw and Lateral Accelerometer Sensor voltage (12 V reference) circuit terminal 1 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.
  4. Ignition OFF, disconnect the harness connector at the EBCM
  5. Test for less than 1 Ω in each serial data circuit between the Yaw and Lateral Accelerometer Sensor and the EBCM.
    • Yaw and Lateral Accelerometer Sensor serial data circuit terminal 2 and EBCM serial data circuit terminal 33
    • Yaw and Lateral Accelerometer Sensor serial data circuit terminal 3 and EBCM serial data circuit terminal 21
    • If greater than the specified value, test the Yaw and Lateral Accelerometer Sensor serial data circuits terminals 2 and 3 for an open/high resistance.
  6. If all circuits test normal, replace the Yaw and Lateral Accelerometer Sensor.
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