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Home >> Chevrolet >> 2018 >> Traverse L >> Repair and Diagnosis >> Accessories & Equipment >> Memory Modules >> Secondary And Configurable Customer Control System >> Diagnostic Information and Procedures >> Steering Wheel Controls Malfunction (with W49) >> Circuit/System Testing

Circuit/System Testing

S70L Steering Wheel Controls Switch - Left

  1. Ignition OFF and all vehicle systems OFF, disconnect the harness connector at the S70L Steering Wheel Controls Switch - Left. 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 6 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. Test for greater than 4.5 V between the signal circuit terminals listed below and ground:
    • Terminal 1
    • Terminal 3
    • If 4.5 V or less 
    1. Ignition OFF, disconnect the harness connector at the S70R Steering Wheel Controls Switch - Right.
    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, test or replace the S70R Steering Wheel Controls Switch - Right.
    • Go to next step: If greater than 4.5 V 
  5. Install a 3 A fused jumper wire between the signal circuit terminal 1 and the ground circuit terminal 6.
  6. Verify the scan tool Steering Wheel Control Switches parameter is Speak.
    • If not Speak 

      Test or replace the S70R Steering Wheel Controls Switch - Right.

    • Go to next step: If Speak 
  7. Remove the jumper wire. Install a 3 A fused jumper wire between the signal circuit terminal 3 and the ground circuit terminal 6.
  8. Verify the scan tool Steering Wheel Control Switches parameter is Mute.
    • If not Mute 

      Test or replace the S70R Steering Wheel Controls Switch - Right.

    • Go to next step: If Mute 
  9. Test or replace the S70L Steering Wheel Controls Switch - Left.

S70R Steering Wheel Controls Switch-Right

  1. Ignition OFF, disconnect the harness connector X1 at the P16 Instrument Cluster.
  2. Disconnect the harness connector at the S70R Steering Wheel Controls Switch - Right. Ignition ON.
  3. Test for less than 1 V between the S70R Steering Wheel Controls Switch - Right serial data circuit terminal 5 and ground.
    • If greater than 1 V 

      Repair the short to voltage on the circuit.

    • Go to next step: If less than 1 V 
  4. Ignition OFF.
  5. Test for infinite resistance between the serial data circuit terminal 5 and ground.
    • If less than infinite resistance 

      Repair the short to ground on the circuit.

    • Go to next step: If infinite resistance 
  6. Replace the S70R Steering Wheel Controls Switch - Right.
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