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Circuit/System Testing

  1. Ignition OFF and all vehicle systems OFF. Disconnect the harness connector at the Yaw and Lateral Accelerometer Sensor. It may take up to 2 minutes for all vehicle systems to power down.
  2. Test for less than 10 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. Ignition ON, test for less than 1 V between each Yaw and Lateral Accelerometer Sensor serial data circuit terminal listed below and ground.
    • Serial data circuit terminal 2
    • Serial data circuit terminal 3
    • If greater than the specified value, test the appropriate serial data circuit for a short to voltage.
  6. Ignition OFF and all vehicle systems OFF. It may take up to 2 minutes for all vehicle systems to power down. Test for infinite resistance between each Yaw and Lateral Accelerometer Sensor serial data circuit terminal listed below and ground.
    • Serial data circuit terminal 2
    • Serial data circuit terminal 3
    • If not the specified value, test the appropriate serial data circuit for a short to ground.
  7. Test for infinite resistance between the Yaw and Lateral Accelerometer Sensor serial data circuit terminal 2 and terminal 3.
    • If not the specified value, test the serial data circuits for a short together.
  8. Test for less than 2 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 appropriate serial data circuit for an open/high resistance.
  9. If all circuits test normal, replace the Yaw and Lateral Accelerometer Sensor.
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