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Home >> Chevrolet >> 2024 >> Traverse Z71 >> Repair and Diagnosis (Single Page) >> Steering >> Steering Column >> Steering Wheel And Column >> Diagnostic Information and Procedures >> Steering Column Tilt/Telescoping Malfunction >> Circuit/System Testing

Circuit/System Testing

Switch Malfunction

  1. Ignition OFF, disconnect the connector at the S71 Steering Column Tilt Wheel and Telescope Switch. It may take up to 2 min 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 
    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, replace the K99 Steering Column Control Module.
    • Go to next step: If less than 10 Ω 
  3. Ignition ON.
  4. Test for B+ between the signal circuit terminals listed below and ground:
    • Terminal 2
    • Terminal 3
    • Terminal 5
    • Terminal 6
    • If less than B+ 
    1. Ignition OFF, disconnect the X1 connector at the K99 Steering Column Control Module.
    2. Test for infinite resistance between the signal circuit and ground.
      • If less than infinite resistance, repair the short to ground on the circuit.
      • Go to next step: If infinite resistance
    3. 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 K99 Steering Column Control Module.
    • Go to next step: If B+ 
  5. Ignition OFF, disconnect the X1 connector at the K99 Steering Column Control Module. It may take up to 2 min for all vehicle systems to power down.
  6. Ignition ON.
  7. Test for less than 1 V between the signal circuit terminals listed below and ground:
    • Terminal 2
    • Terminal 3
    • Terminal 5
    • Terminal 6
    • If greater than 1 V 

      Repair the short to voltage on the circuit

    • Go to next step: If less than 1 V 
  8. Test or replace the S71 Steering Column Tilt Wheel and Telescope Switch.

Telescope Actuator Malfunction

  1. Ignition OFF, disconnect the X2 connector at the K99 Steering Column Control Module, ignition ON.
  2. Test for less than 1 V between each circuit terminal listed below and ground at the K99 Steering Column Control Module harness connector.
    • Steering Column Telescope Actuator Forward - terminal 7
    • Steering Column Telescope Actuator Rearward - terminal 8
    • Steering Column Telescope Actuator Signal - terminal 1
    • If 1 V or greater 

      Repair the short to voltage on the circuit.

    • Go to next step: If less than 1 V 
  3. Ignition OFF.
  4. Test for infinite resistance between each circuit terminal listed below and ground at the K99 Steering Column Control Module harness connector.
    • Steering Column Telescope Actuator Forward - terminal 7
    • Steering Column Telescope Actuator Rearward - terminal 8
    • Steering Column Telescope Actuator Signal - terminal 1
    • If less than infinite resistance 

      Repair the short to ground on the circuit.

    • Go to next step: If Infinite resistance 
  5. Replace the M65 Steering Column Telescope Actuator.

Tilt Wheel Actuator Malfunction

  1. Ignition OFF, disconnect the X2 connector at the K99 Steering Column Control Module, ignition ON.
  2. Test for less than 1 V between each circuit terminal listed below and ground at the K99 Steering Column Tilt Wheel and Telescope Control Module harness connector.
    • Steering Column Tilt Wheel Actuator Down Control - terminal 9
    • Steering Column Tilt Wheel Actuator Up Control - terminal 10
    • Steering Column Tilt Wheel Actuator Signal - terminal 3
    • If 1 V or greater 

      Repair the short to voltage on the circuit.

    • Go to next step: If less than 1 V 
  3. Ignition OFF.
  4. Test for infinite resistance between each circuit terminal listed below and ground at the K99 Steering Column Tilt Wheel and Telescope Control Module harness connector.
    • Steering Column Tilt Wheel Actuator Down Control - terminal 9
    • Steering Column Tilt Wheel Actuator Up Control - terminal 10
    • Steering Column Tilt Wheel Actuator Signal - terminal 3
    • If less than infinite resistance 

      Repair the short to ground on the circuit.

    • Go to next step: If Infinite resistance 
  5. Replace the M68 Steering Column Tilt Wheel Actuator.

Steering Column Tilt Wheel Actuator and Telescope Actuator Control Circuit Test

  1. Ignition OFF and all vehicle systems OFF, disconnect the X1 connector at the K99 Steering Column Control Module. It may take up to 2 min for all vehicle systems to power down.
  2. Test for less than 10 Ω between the ground circuit terminal 8 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.
    • Go to next step: If less than 10 Ω 
  3. Ignition ON.
  4. Verify a test lamp illuminates between the B+ circuit terminal 7 and ground.
    • If the test lamp does not illuminate and the circuit fuse is good 
    1. Ignition OFF.
    2. Test for less than 2 Ω in the B+ circuit end to end.
      • If 2 Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2 Ω, verify the fuse is OK and there is voltage at the fuse.
    • If the test lamp does not illuminate and the circuit fuse is open 
    1. Ignition OFF.
    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 K99 Steering Column Control Module.
    • Go to next step: If the test lamp illuminates 
  5. Ignition OFF, connect the X1 connector at the K99 Steering Column Control Module. Disconnect the connector at the S71 Steering Column Tilt Wheel and Telescope Switch.
  6. Test for less than 10 Ω between the ground circuit terminal 1 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, replace the K99 Steering Column Control Module.
    • Go to next step: If less than 10 Ω 
  7. Replace the K99 Steering Column Control Module.
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