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Home >> Chevrolet >> 2015 >> Cruze LT, Automatic Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 50 (Steering Wheel And Steering Column) >> Diagnostic Information and Procedures >> Heated Steering Wheel Malfunction >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2015 Chevrolet Trax and 2015 Buick Encore. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the X4 in-line harness connector at the K32 Heated Steering Wheel Control Module.
  2. Test for less than 10 Ω between the ground circuit terminal 2 and ground.
    • If 10 Ω or greater 
    1. Ignition OFF.
    2. Test for less than 2 Ω in the ground circuit end to end.
      • If 2 Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2 Ω, repair the open/high resistance in the ground connection.
    • If less than 10 Ω 
  3. Ignition ON.
  4. Verify a test lamp illuminates between the ignition voltage circuit terminal 1 and ground.
    • If the test lamp does not illuminate and the circuit fuse is good 
    1. Ignition OFF, remove the test lamp.
    2. Test for less than 2 Ω in the ignition circuit end to end.
      • If less than 2 Ω, verify the fuse is OK and there is voltage at the fuse. Refer to Power Mode Mismatch .
      • If 2 Ω or greater
    3. Verify the in-line fuse is OK and there is voltage at the fuse.
      • If the in-line fuse is blown, replace the K32 Steering Wheel Heating Control Module.
      • If the in-line fuse is OK, repair the open/high resistance in the circuit.
    • If the test lamp does not illuminate and the circuit fuse is open 
    1. Ignition OFF.
    2. Test for infinite resistance between the ignition voltage circuit and ground.
      • If less than infinite resistance, repair the short to ground on the circuit.
      • If infinite resistance, replace the K32 Steering Wheel Heating Control Module.
    • If the test lamp illuminates 
  5. Ignition OFF, connect the in-line harness connector X4. Disconnect the harness connector at the A26 HVAC Controls.
  6. Test for less than 10 Ω between the ground circuit terminal 2 and ground.
    • If 10 Ω or greater 
    1. Ignition OFF.
    2. Test for less than 2 Ω in the ground circuit end to end.
      • If 2 Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2 Ω, repair the open/high resistance in the ground connection.
    • If less than 10 Ω 
  7. Ignition ON.
  8. Test for 4-5 V between the signal circuit terminal 5 and ground.
    • If less than 4-5 V 
    1. Ignition OFF, disconnect the X2 harness at the X85 Steering Wheel Air Bag Coil.
    2. Test for infinite resistance between the Steering Wheel Air Bag Coil terminal 1 and ground.
      • If less than infinite resistance, repair the short to ground on the circuit.
      • If infinite resistance
    3. Test for less than 2 Ω in the control circuit end to end.
      • If 2 Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2 Ω, replace the K32 Steering Wheel Heating Control Module.
    • If greater than 4-5 V 
    1. Ignition OFF, disconnect the X2 harness at the X85 Steering Wheel Air Bag Coil..
    2. Ignition ON.
    3. Test for less than 1 V between the Steering Wheel Air Bag Coil terminal 1 and ground.
    4. If greater than 1 V, repair the short to voltage on the circuit
    • If 4-5 V 
  9. Ignition OFF, connect the harness connector at the A26 HVAC Controls.
  10. Test for infinite resistance between the X2 terminal 1 of the Steering Wheel Air Bag Coil and ground at the while the steering wheel heat switch is not being pressed.
    • If less than infinite resistance 

      Replace the A26 HVAC Controls.

    • If infinite resistance 
  11. Test for less than 60 Ω between the X2 terminal 1 of the Steering Wheel Air Bag Coil and ground while the steering wheel heat switch is being pressed.
    • If 60 Ω or greater 

      Replace the A26 HVAC Controls.

    • If less than 60 Ω 
  12. Disconnect the in-line harness connector at the E15 Steering Wheel Heater.
  13. Test for less than 10 Ω between the ground circuit terminal A at the K32 Steering Wheel Heating Control Module and ground.
    • If 10 Ω or greater 

      Repair the open/high resistance in the circuit.

    • If less than 10 Ω 
  14. Test for 1.5-3.0 Ω between the signal terminal B and the ground terminal A at the E15 Steering Wheel Heater.
    • If not within the specified range 

      Replace the E15 Steering Wheel Heater.

    • If within the specified range 
  15. Test for 9-12k Ω between the control circuit terminal C and the ground terminal D on the E15 Steering Wheel Heater.
    • If not within the specified range 

      Replace the E15 Steering Wheel Heater.

    • If within the specified range 
  16. Replace the K32 Steering Wheel Heating Control Module.
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