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Circuit/System Testing

DTC U1826

  1. Ignition OFF, disconnect the harness connector at the Yaw and Lateral Accelerometer Sensor.
  2. Test for less than 5 Ω between the ground circuit terminal 6 and ground.
    • If greater than the specified range, test the ground circuit for an open/high resistance.
  3. Ignition ON, verify that a test lamp illuminates between the ignition circuit terminal 1 and ground.
    • If the test lamp does not illuminate, test the ignition 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 range, test the appropriate serial data circuit for an open/high resistance.
  6. If all circuits test normal, replace the Yaw and Lateral Accelerometer Sensor.

DTC U1827

  1. Ignition OFF, disconnect the harness connector at the Steering Wheel Position Sensor.
  2. Test for less than 5 Ω between the ground circuit terminal 6 and ground.
    • If greater than the specified range, test the ground circuit for an open/high resistance.
  3. Ignition ON, verify that a test lamp illuminates between the ignition circuit terminal 5 and ground.
    • If the test lamp does not illuminate, test the ignition 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 Yaw and Lateral Accelerometer Sensor.
  5. Test for less than 1 Ω in each serial data circuit between the Steering Wheel Position Sensor and the Yaw and Lateral Accelerometer Sensor.
    • Steering Wheel Position Sensor serial data circuit terminal 2 and Yaw and Lateral Accelerometer Sensor serial data circuit terminal 5
    • Steering Wheel Position Sensor serial data circuit terminal 3 and Yaw and Lateral Accelerometer Sensor serial data circuit terminal 4
    • If greater than the specified range, test the appropriate serial data circuit for an open/high resistance.
  6. If all circuits test normal, replace the Steering Wheel Position Sensor.
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