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Home >> Chevrolet >> 2014 >> Trax LS, Automatic Trans >> Repair and Diagnosis >> Accessories & Equipment >> Drivers Assistance Systems - ADAS >> Object Detection System And Pedestrian Protection System >> Diagnostic Information and Procedures >> DTC B356A: Vehicle Direction Warning Switch Circuit >> Circuit/System Testing
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Circuit/System Testing

  1. Ignition OFF and all vehicle systems OFF, disconnect the harness connectors at the S48E Multifunction Switch - Center Console and 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 following ground circuit terminals and ground:
    • S48E Multifunction Switch - Center Console terminal 9
    • S70L Steering Wheel Controls Switch - Left terminal 7
    • If 10 Ω or greater 
    1. 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.
    • If less than 10 Ω 
  3. Ignition ON.
  4. Verify the scan tool Lane Departure Warning Switch Status parameter is Open.
    • If not Open 
    1. Ignition OFF, disconnect the harness connector at the K109 Frontview Camera Module.
    2. Test for infinite resistance between the S48E Multifunction Switch - Center Console signal circuit terminal 7 and ground.
    • If less than infinite resistance, repair the short to ground on the circuit.
    • If infinite resistance, replace the K109 Frontview Camera Module.
    • If Open 
  5. Install a 3 A fused jumper wire between the S48E Multifunction Switch - Center Console signal circuit terminal 7 and ground.
  6. Verify DTC B356A 02 sets in approximately 10 s.
    • If DTC does not set 
    1. Ignition OFF, remove the jumper wire, disconnect the harness connector at the K109 Frontview Camera Module, ignition ON.
    2. Test for less than 1 V between the signal circuit and ground.
      • If 1 V or greater, repair the short to voltage on the circuit.
      • If less than 1 V
    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 K109 Frontview Camera Module.
    • If DTC sets 
  7. Test or replace the S48E Multifunction Switch - Center Console or S70L Steering Wheel Controls Switch - Left.
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