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Home >> Buick >> 2015 >> Regal GS, AWD >> Repair and Diagnosis >> Steering >> Steering Wheel And Steering Column >> Diagnostic Information and Procedures >> Heated Steering Wheel Malfunction >> Circuit/System Testing

Circuit/System Testing

  1. Ignition OFF, disconnect the X5 in-line harness connector at the K32 Steering Wheel Heating Control Module.
  2. Test for less than 10Ω between the ground terminal 2 and ground.
    • If 10Ω or greater 
    1. Ignition OFF.
    2. Test for less than 2Ω in the ground circuit end to end.
      • If 2Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2Ω, repair the open/high resistance in the ground connection.
    • If less than 10Ω 
  3. Ignition ON.
  4. Verify a test lamp illuminates between the B+ 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 2Ω in the ignition circuit end to end.
      • If less than 2Ω, verify the fuse is OK and there is voltage at the fuse. Refer to Power Mode Mismatch .
      • If 2Ω 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, remove the test lamp.
    2. Test for infinite resistance between the ignition 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, reconnect the in-line harness connector X5. Disconnect the harness connector at the S70L Steering Wheel Controls Switch - Left.
  6. Test for less than 10Ω between the ground circuit terminal 7 and ground.
    • If 10Ω or greater 
    1. Ignition OFF.
    2. Test for less than 2Ω in the ground circuit end to end.
      • If 2Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2Ω, repair the open/high resistance in the ground connection.
    • If less than 10Ω 
  7. Ignition ON.
  8. Test for 4.5-5.5V between the signal circuit terminal 4 and ground.
    • If less than 4.5V 
    1. Ignition OFF, disconnect the in-line connector at the S70L Steering Wheel Controls Switch - Left.
    2. Test for infinite resistance between the signal circuit and ground.
      • If less than infinite resistance, repair the short to ground on the circuit.
      • If infinite resistance
    3. Test for less than 2Ω in the signal circuit end to end.
      • If 2Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2Ω, replace the K32 Steering Wheel Heating Control Module.
    • If 5.5V or greater 
    1. Ignition OFF, disconnect the in-line connector at the S70L Steering Wheel Controls Switch - Left. Ignition ON.
    2. Test for less than 1V between the signal circuit and ground.
    • If 1V or greater, repair the short to voltage on the circuit.
    • If less than 1V, replace the K32 Steering Wheel Heating Control Module.
    • If with in 4.5-5.5V 
  9. Place the S70L Steering Wheel Controls Switch - Left in the OFF position.
  10. Test for infinite resistance between terminal 4 and terminal 7 at the S70L Steering Wheel Controls Switch - Left.
    • If less than infinite resistance 

      Replace the S70L Steering Wheel Controls Switch - Left

    • If infinite resistance 
  11. Place the S70L Steering Wheel Controls Switch - Left in the ON position.
  12. Test for less than 2Ω between terminal 4 and terminal 7.
    • If 2Ω or greater 

      Replace the S70L Steering Wheel Controls Switch - Left

    • If less than 2Ω 
  13. Ignition OFF, disconnect the in-line harness connector at the E15 Steering Wheel Heater.
  14. Test for less than 10Ω between the ground circuit terminal A at the K32 Steering Wheel Heating Control Module and ground.
    • If 10Ω or greater 

      Repair the open/high resistance in the circuit.

    • If less than 10Ω 
  15. Test for 1.8-2.24Ω between the control circuit terminal B and the ground circuit 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 
  16. Test for 5700-70600Ω between the 5V reference circuit terminal D and the low reference circuit terminal C at the E15 Steering Wheel Heater.
    • If not within the specified range 

      Replace the E15 Steering Wheel Heater.

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