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Circuit/System Testing

  1. Ignition OFF, disconnect the EBCM harness connector at the Yaw and Lateral Accelerometer Sensor.
  2. Ignition OFF, with a DMM test for less than 5.0 ohms between the Vehicle Yaw and Lateral Accelerometer Sensor ground circuit terminal and ground.
    • If greater than the specified range, with the DMM test the low reference circuit terminal for an open/high resistance. If the circuit tests normal, replace the EBCM.
  3. Ignition ON, with a DMM test for 0.225-4.775 volts between the Yaw and Lateral Accelerometer Sensor lateral accelerometer signal circuit terminal and ground.
    • If less than the specified range, with the DMM test the lateral accelerometer signal circuit terminal for a short to ground or an open/high resistance. If the circuit tests normal, replace the EBCM.
    • If greater than the specified range, with the DMM test the lateral accelerometer signal circuit terminal for a short to voltage. If the circuit tests normal, replace the EBCM.
  4. Ignition ON, with a DMM test for 0.225-4.775 volts between the Yaw and Lateral Accelerometer Sensor yaw rate signal circuit terminal and ground.
    • If less than the specified range, with the DMM test the yaw rate signal circuit terminal for a short to ground or an open/high resistance. If the circuit tests normal, replace the EBCM.
    • If greater than the specified range, with the DMM test the yaw rate signal circuit terminal for a short to voltage. If the circuit tests normal, replace the EBCM.
  5. Ignition ON, with the DMM, test for battery voltage at the Vehicle Yaw and Lateral Accelerometer Sensor Ignition 1 terminal circuit and the ground circuit terminal 6.
    • If less than the specified value, test the ignition circuit terminal for a open/high resistance. If the circuit tests normal, replace the EBCM.
  6. Install a 3A fused jumper wire between the Yaw and Lateral Accelerometer Sensor signal circuit terminal and the Yaw and Lateral Accelerometer Sensor Volt reference circuit terminal. With a DMM, verify the voltage range is 2-3 volts.
    • If less than the specified value, test the 5-volt reference circuit terminal for a short to ground or an open/high resistance. If the circuit tests normal, replace the EBCM.
    • If greater than the specified value, test the 5-volt reference circuit terminal for a short to voltage. If the circuit tests normal, replace the EBCM.
  7. If all circuits test normal, test or replace the Yaw and Lateral Accelerometer Sensor.
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