LEMON Manuals: Even more car manuals for everyone
Home >> Buick >> 2017 >> LaCrosse Base >> 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/System Testing - with UGN

Circuit/System Testing - with UGN

  1. Ignition OFF and all vehicle systems OFF, disconnect the harness connector at the S48A Multifunction Switch - Instrument Panel.
  2. Ignition ON.
  3. Verify the scan tool Vehicle Direction Warning Switch Status parameter is Open.
    • If not Open 
    1. Ignition OFF, disconnect the harness connector at the K124 Active Safety Control Module.
    2. Test for infinite resistance between the S48A Multifunction Switch - Instrument Panel signal circuit terminal 10 and ground.
    • If less than infinite resistance, repair the short to ground on the circuit.
    • If infinite resistance, replace the K124 Active Safety Control Module.
    • If Open 
  4. Install a 3 A fused jumper wire between the signal circuit terminal 1 and ground.
  5. Verify within 10 s the scan tool Vehicle Direction Warning Switch Status parameter is Closed.
    • If not Closed 
    1. Ignition OFF, disconnect harness connector at the K124 Active Safety Control Module. Ignition ON.
    2. Test for less than 1 V between the S48A Multifunction Switch - Instrument Panel signal circuit terminal 10 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 K124 Active Safety Control Module.
    • If Closed 
  6. Test or replace the S48A Multifunction Switch - Instrument Panel.
scientia non olet · About LEMON Manuals