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Home >> GMC >> 2013 >> Acadia SL >> Repair and Diagnosis >> Engine Performance >> System >> Data Communication System >> Diagnostic Information and Procedures >> DTC U2105-U2199 >> Circuit/System Testing
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Circuit/System Testing

Only DTC C0710 is set

  1. Ignition OFF and all vehicle systems OFF. Disconnect the harness connectors at the steering wheel speed position sensor. It may take up to 2 minutes for all vehicle systems to power down.
  2. Test for less than 10 Ω between the low reference circuit terminal 6 and ground.
    • If 10 Ω or greater 

      Repair the open/high resistance in the circuit between the X201 inline connector and the steering wheel speed position sensor.

    • If less than 10 Ω 
  3. Ignition ON.
  4. Verify a test lamp illuminates between the ignition circuit terminal 5 and ground.
    • If the test lamp does not illuminate 

      Repair the open/high resistance in the circuit between the X201 inline connector and the steering wheel speed position sensor.

    • If the test lamp illuminates 
  5. Ignition OFF and all vehicle systems OFF. It may take up to 2 minutes for all vehicle systems to power down.
  6. Test for less than 70 Ω between the serial data circuits terminal 2 and 3.
    • If 70 Ω or greater 

      Repair the open/high resistance in the circuits between the X201 inline connector and the steering wheel speed position sensor.

    • If less than 70 Ω 
  7. Replace the steering wheel speed position sensor.

Only DTC U2142 is set

  1. Ignition OFF and all vehicle systems OFF. Disconnect the harness connectors 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 low reference circuit terminal 1 and ground.
    • If 10 Ω or greater 

      Repair the open/high resistance in the circuit between the X201 inline connector and the yaw and lateral accelerometer sensor.

    • If less than 10 Ω 
  3. Ignition ON.
  4. Verify a test lamp illuminates between the ignition circuit terminal 4 and ground.
    • If the test lamp does not illuminate 

      Repair the open/high resistance in the circuit between the X201 inline connector and the yaw and lateral accelerometer sensor.

    • If the test lamp illuminates 
  5. Ignition OFF and all vehicle systems OFF. It may take up to 2 minutes for all vehicle systems to power down.
  6. Test for less than 130 Ω between the serial data circuits terminal 2 and 3.
    • If 130 Ω or greater 

      Repair the open/high resistance in the circuits between the X201 inline connector and the yaw and lateral accelerometer sensor.

    • If less than 130 Ω 
  7. Replace the yaw and lateral accelerometer sensor.

Both DTC C0710 and U2142 are set

  1. Ignition OFF and all vehicle systems OFF. Disconnect the harness connectors at the steering wheel speed position sensor. It may take up to 2 minutes for all vehicle systems to power down.
  2. Test for less than 10 Ω between the low reference circuit terminal 6 and ground.
    • If 10 Ω or greater 
    1. Ignition OFF, disconnect the harness connector at the electronic brake control module.
    2. Test for less than 2 Ω in the low reference circuit end to end.
      • If 2 Ω or greater, repair the open/high resistance in the circuit between the splice and the electronic brake control module.
      • If less than 2 Ω, replace the electronic brake control module.
    • If less than 10 Ω 
  3. Ignition ON.
  4. Verify a test lamp illuminates between the ignition circuit terminal 5 and ground.
    • If the test lamp does not illuminate 
    1. Ignition OFF, disconnect the harness connectors at the yaw and lateral accelerometer sensor, ignition ON.
    2. Verify a test lamp illuminates between the ignition circuit and ground.
      • If the test lamp illuminates, replace the yaw and lateral accelerometer sensor.
      • If the test lamp does not illuminate
    3. Ignition OFF, disconnect the harness connectors at the electronic brake control module.
    4. Test for infinite resistance between the ignition circuit and ground.
      • If less than infinite resistance, repair the short ground on the circuit.
      • If infinite resistance
    5. Test for less than 2 Ω in the ignition circuit end to end between the steering wheel speed position sensor and the electronic brake control module terminal 32.
      • If greater than 2 Ω, repair the open/high resistance in the circuit.
      • If less than 2 Ω, replace the electronic brake control module.
    • If the test lamp illuminates 
  5. Test for less than 4.5 V between the serial data circuits listed below and ground.
    • Terminal 2
    • Terminal 3
    • If 4.5 V or greater 
    1. Ignition OFF, disconnect the harness connectors at the yaw and lateral accelerometer sensor, ignition ON.
    2. Test for less than 4.5 V between the serial data circuit and ground.
      • If 4.5 V or less, replace the yaw and lateral accelerometer sensor.
      • If greater than 4.5 V
    3. Ignition OFF, disconnect the harness connectors at the electronic brake control module, ignition ON.
    4. Test for less than 1 V between the serial data circuit and ground.
      • If 1 V or greater, repair the short to voltage on the circuit.
      • If less than 1 V, replace the electronic brake control module.
    • If less than 4.5 V 
  6. Ignition OFF and all vehicle systems OFF. It may take up to 2 minutes for all vehicle systems to power down.
  7. Test for greater than 100 Ω between the serial data circuits listed below and ground.
    • Terminal 2
    • Terminal 3
    • If 100 Ω or less 
    1. Ignition OFF, disconnect the harness connectors at the electronic brake control module.
    2. Test for greater than 100 Ω between the serial data circuit and ground.
      • If 100 Ω or greater, replace the electronic brake control module.
      • If less than 100 Ω
    3. Disconnect the harness connectors at the yaw and lateral accelerometer sensor.
    4. Test for infinite resistance between the serial data circuit and ground.
      • If less than infinite resistance, repair the short to ground on the circuit.
      • If infinite resistance, replace the yaw and lateral accelerometer sensor.
    • If greater than 100 Ω 
  8. Test for 50-70 Ω between the serial data circuits terminal 2 and 3.
    • If less than 50 Ω 
    1. Ignition OFF, disconnect the harness connectors at the electronic brake control module.
    2. Test for greater than 110 Ω between the serial data circuits.
      • If 110 Ω or greater, replace the electronic brake control module.
      • If less than 110 Ω
    3. Disconnect the harness connectors at the yaw and lateral accelerometer sensor.
    4. Test for infinite resistance between the serial data circuits.
      • If less than infinite resistance, repair the short between the circuits.
      • If infinite resistance, replace the yaw and lateral accelerometer sensor.
    • If greater than 70 Ω 
    1. Ignition OFF, disconnect the harness connectors at the electronic brake control module.
    2. Test for less than 2 Ω in the serial data circuits listed below end to end.
      • The steering wheel speed position sensor terminal 2 and the electronic brake control module terminal 24
      • The steering wheel speed position sensor terminal 3 and the electronic brake control module terminal 37
        • If greater than 2 Ω, repair the open/high resistance in the circuit.
        • If less than 2 Ω
    3. Test for less than 130 Ω between the serial data circuits terminal 2 and 3.
      • If 130 Ω or less, replace the electronic brake control module.
      • If greater than 130 Ω
    4. Disconnect the harness connectors at the yaw and lateral accelerometer sensor.
    5. Test for less than 2 Ω in the serial data circuits listed below end to end.
      • The steering wheel speed position sensor terminal 2 and the yaw and lateral accelerometer sensor terminal 2
      • The steering wheel speed position sensor terminal 3 and the yaw and lateral accelerometer sensor terminal 3
        • If greater than 2 Ω, repair the open/high resistance in the circuit.
        • If less than 2 Ω, replace the yaw and lateral accelerometer sensor.
    • If between 50-70 Ω 
  9. Replace the steering wheel speed position sensor.
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