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Home >> GMC >> 2019 >> Terrain SL >> Repair and Diagnosis >> External Pages >> Different car >> Section 126 (Secondary And Configurable Customer Control System) >> Diagnostic Information And Procedures >> DTC B3622: Steering Wheel Controls Signal Circuit >> Circuit/System Testing >> S70E Steering Wheel Controls Switch - Radio Presets
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S70E Steering Wheel Controls Switch - Radio Presets

WARNING: This page is about a different car, the 2018 GMC Terrain and 2018 Chevrolet Equinox. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF and all vehicle systems OFF, disconnect the harness connector at the S70E Steering Wheel Controls Switch - Radio Presets. 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 3 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 2
    • 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.
      • 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 3.
  6. Verify the scan tool Steering Wheel Control Switches parameter is Next Preset.
    • If not Next Preset 

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

    • Go to next step: If Next Preset 
  7. Remove the jumper wire. Install a 3 A fused jumper wire between the signal circuit terminal 2 and the ground circuit terminal 3.
  8. Verify the scan tool Steering Wheel Control Switches parameter is Previous Preset.
    • If not Previous Preset 

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

    • Go to next step: If Previous Preset 
  9. Test or replace the S70E Steering Wheel Controls Switch - Radio Presets.
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