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Home >> Cadillac >> 2021 >> XT5 Sport >> Repair and Diagnosis >> External Pages >> Different car >> Section 829 (Secondary And Configurable Customer Controls) >> Diagnostic Information and Procedures >> Steering Wheel Controls Malfunction >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2023 GMC Sierra 3500 HD and 2023 GMC Sierra 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.

S70E Steering Wheel Controls Switch - Radio Presets

    NOTE:

    It may take up to 2 min for all vehicle systems to power down before an accurate ground or low reference circuit continuity test can be performed.

  1. Ignition/Vehicle & All vehicle systems - Off
  2. Disconnect the electrical connector: S70E Steering Wheel Controls Switch - Radio Presets
  3. Test for less than 10 ohms between the test points: Ground circuit terminal 3 & Ground
    • If 10 ohms or greater 
    1. Disconnect the concerned ground connection.
    2. Test for less than 2 ohms between the test points: Ground circuit terminal 3@Component harness & The other end of the circuit@Ground terminal
      • If 2 ohms or greater - Repair the open/high resistance in the circuit.
      • If less than 2 ohms - Repair the open/high resistance in the ground connection.
    • Go to next step: If less than 10 ohms 
  4. Ignition - On/Vehicle - In Service Mode
  5. Verify the scan tool parameter: Steering Wheel Control Switches = Inactive
    • If not the specified state 
    1. Ignition/Vehicle - Off
    2. Disconnect the electrical connector: S70R Steering Wheel Controls Switch - Right
    3. Test for infinite resistance between the test points: Signal circuit terminal 1@S70EComponent harness & Ground
      • If less than infinite resistance - Repair the short to ground on the circuit.
      • Go to next step: If infinite resistance
    4. Test for infinite resistance between the test points: Signal circuit terminal 2@S70EComponent harness & Ground
      • If less than infinite resistance - Repair the short to ground on the circuit.
      • If infinite resistance - Replace the component: S70R Steering Wheel Controls Switch - Right
    • Go to next step: If the specified state 
  6. Connect a 3 A fused jumper wire between the test points: Signal circuit terminal 1 & Ground circuit terminal 3@S70EComponent harness
  7. Verify the scan tool parameter: Steering Wheel Control Switches = Previous Preset
    • If not the specified state 
    1. Ignition/Vehicle - Off & Remove - Jumper wire(s)
    2. Disconnect the electrical connector: S70R Steering Wheel Controls Switch - Right
    3. Ignition - On/Vehicle - In Service Mode
    4. Test for less than 1 V between the test points: Signal circuit terminal 1@S70EComponent harness & Ground
      • If 1 V or greater - Repair the short to voltage on the circuit.
      • Go to next step: If less than 1 V
    5. Ignition/Vehicle - Off
    6. Test for less than 2 ohms between the test points: Signal circuit terminal 1@S70EComponent harness & The other end of the circuit
      • If 2 ohms or greater - Repair the open/high resistance in the circuit.
      • If less than 2 ohms - Replace the component: S70R Steering Wheel Controls Switch - Right
    • Go to next step: If the specified state 
  8. Connect a 3 A fused jumper wire between the test points: Signal circuit terminal 2 & Ground circuit terminal 3@S70EComponent harness
  9. Verify the scan tool parameter: Steering Wheel Control Switches = Next Preset
    • If not the specified state 
    1. Ignition/Vehicle - Off & Remove - Jumper wire(s)
    2. Disconnect the electrical connector: S70R Steering Wheel Controls Switch - Right
    3. Ignition - On/Vehicle - In Service Mode
    4. Test for less than 1 V between the test points: Signal circuit terminal 2@S70EComponent harness & Ground
      • If 1 V or greater - Repair the short to voltage on the circuit.
      • Go to next step: If less than 1 V
    5. Ignition/Vehicle - Off
    6. Test for less than 2 ohms between the test points: Signal circuit terminal 2@S70EComponent harness & The other end of the circuit
      • If 2 ohms or greater - Repair the open/high resistance in the circuit.
      • If less than 2 ohms - Replace the component: S70R Steering Wheel Controls Switch - Right
    • Go to next step: If the specified state 
  10. Test or replace the component: S70E Steering Wheel Controls Switch - Radio Presets

S70F Steering Wheel Controls Switch - Radio Volume

    NOTE:

    It may take up to 2 min for all vehicle systems to power down before an accurate ground or low reference circuit continuity test can be performed.

  1. Ignition/Vehicle & All vehicle systems - Off
  2. Disconnect the electrical connector: S70F Steering Wheel Controls Switch - Radio Volume
  3. Test for less than 10 ohms between the test points: Ground circuit terminal 3 & Ground
    • If 10 ohms or greater 
    1. Disconnect the concerned ground connection.
    2. Test for less than 2 ohms between the test points: Ground circuit terminal 3@Component harness & The other end of the circuit@Ground terminal
      • If 2 ohms or greater - Repair the open/high resistance in the circuit.
      • If less than 2 ohms - Repair the open/high resistance in the ground connection.
    • Go to next step: If less than 10 ohms 
  4. Ignition - On/Vehicle - In Service Mode
  5. Verify the scan tool parameter: Steering Wheel Control Switches = Inactive
    • If not the specified state 
    1. Ignition/Vehicle - Off
    2. Disconnect the electrical connector: S70R Steering Wheel Controls Switch - Right
    3. Test for infinite resistance between the test points: Signal circuit terminal 1@S70FComponent harness & Ground
      • If less than infinite resistance - Repair the short to ground on the circuit.
      • Go to next step: If infinite resistance
    4. Test for infinite resistance between the test points: Signal circuit terminal 2@S70FComponent harness & Ground
      • If less than infinite resistance - Repair the short to ground on the circuit.
      • If infinite resistance - Replace the component: S70R Steering Wheel Controls Switch - Right
    • Go to next step: If the specified state 
  6. Connect a 3 A fused jumper wire between the test points: Signal circuit terminal 1 & Ground circuit terminal 3@S70FComponent harness
  7. Verify the scan tool parameter: Steering Wheel Control Switches = Volume Down Button
    • If not the specified state 
    1. Ignition/Vehicle - Off & Remove - Jumper wire(s)
    2. Disconnect the electrical connector: S70R Steering Wheel Controls Switch - Right
    3. Ignition - On/Vehicle - In Service Mode
    4. Test for less than 1 V between the test points: Signal circuit terminal 1@S70FComponent harness & Ground
      • If 1 V or greater - Repair the short to voltage on the circuit.
      • Go to next step: If less than 1 V
    5. Ignition/Vehicle - Off
    6. Test for less than 2 ohms between the test points: Signal circuit terminal 1@S70FComponent harness & The other end of the circuit
      • If 2 ohms or greater - Repair the open/high resistance in the circuit.
      • If less than 2 ohms - Replace the component: S70R Steering Wheel Controls Switch - Right
    • Go to next step: If the specified state 
  8. Connect a 3 A fused jumper wire between the test points: Signal circuit terminal 2 & Ground circuit terminal 3@S70FComponent harness
  9. Verify the scan tool parameter: Steering Wheel Control Switches = Volume Up Button
    • If not the specified state 
    1. Ignition/Vehicle - Off & Remove - Jumper wire(s)
    2. Disconnect the electrical connector: S70R Steering Wheel Controls Switch - Right
    3. Ignition - On/Vehicle - In Service Mode
    4. Test for less than 1 V between the test points: Signal circuit terminal 2@S70FComponent harness & Ground
      • If 1 V or greater - Repair the short to voltage on the circuit.
      • Go to next step: If less than 1 V
    5. Ignition/Vehicle - Off
    6. Test for less than 2 ohms between the test points: Signal circuit terminal 2@S70FComponent harness & The other end of the circuit
      • If 2 ohms or greater - Repair the open/high resistance in the circuit.
      • If less than 2 ohms - Replace the component: S70R Steering Wheel Controls Switch - Right
    • Go to next step: If the specified state 
  10. Test or replace the component: S70F Steering Wheel Controls Switch - Radio Volume
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