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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 Indicator 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 X4 in-line harness connector. Disconnect the harness connector at the A26 HVAC Controls.
  6. Verify a test lamp illuminates between the B+ 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 c in the B+ circuit end to end.
      • If 2 Ω or greater, repair the open/high resistance in the circuit.
      • If less than If less than 2 Ω, verify the fuse is not open and there is voltage at the fuse.
    • If the test lamp does not illuminate and the circuit fuse is open 
    1. Ignition OFF, remove the test lamp.
    2. Test for infinite resistance between the B+ circuit and ground.
      • If less than infinite resistance, repair the short to ground on the circuit.
      • If infinite resistance, replace the A26 HVAC Controls.
    • If the test lamp illuminates 
  7. Ignition ON.
  8. Test for less than 1 V between the control circuit terminal 4 and ground.
    • If greater than 1 V 
    1. Disconnect the X2 harness connector at the X85 Steering Wheel Air Bag Coil.
    2. Test for less than 1 V between the Steering Wheel Air Bag Coil terminal 2 and ground.
      • If greater than 1 V, repair the short to voltage on the circuit.
      • If less than 1 V
    3. Replace the K32 Steering Wheel Heating Control Module.
    • If less than 1 V 
  9. Ignition OFF.
  10. Test for infinite resistance between the control circuit terminal 4 and ground.
    • If less than infinite resistance 
    1. Disconnect the X2 harness connector at the X85 Steering Wheel Air Bag Coil.
    2. Test for infinite resistance between the signal circuit at the Steering Wheel Air Bag Coil and ground.
      • If less than infinite resistance, repair the short to ground on the circuit.
      • If infinite resistance
    3. Replace the K32 Steering Wheel Heating Control Module.
    • If infinite resistance 
  11. Connect the A26 HVAC Controls.
  12. Install a 3 A fused jumper wire between the Steering Wheel Air Bag Coil terminal 2 and ground. Ignition ON.
  13. Verify the steering wheel heat indicator is illuminated.
    • If the steering wheel heat indicator does not illuminate 
    1. Disconnect the A26 HVAC Controls harness connector.
    2. Test for less than 2 Ω in the signal circuit end to end.
      • If 2 Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2 Ω, replace the A26 HVAC Controls.
    • If the steering wheel heat indicator illuminates 
  14. Replace the K32 Steering Wheel Heating Control Module.
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