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Home >> Chevrolet >> 2016 >> Spark LS, Standard Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 15 (Power Door Lock System And Release Systems) >> Diagnostic Information and Procedures >> DTC B3067: Key Cylinder Lock/Unlock Function Inoperative >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2015 Chevrolet Spark. 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 A23D Door Latch Assembly-Driver. It may take up to 2 minutes for all vehicle systems to power down.
  2. Test for less than 10 Ω between the ground circuit terminal listed below and ground:
    • Ground circuit terminal B - left hand drive
    • Ground circuit terminal C - right hand drive
    • 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.
    • If less than 10 Ω 
  3. Ignition ON.
  4. Test for greater than 10 V between the signal circuit terminals listed below and ground:
    • Signal circuit terminal D - right hand drive
    • Signal circuit terminal B - right hand drive
    • Signal circuit terminal A - left hand drive
    • Signal circuit terminal C - left hand drive
    • If 10 V or less 
    1. Ignition OFF, disconnect the harness connector at the K9 Body Control Module.
    2. Test for infinite resistance between the signal circuit and ground.
      • If less than infinite resistance, repair the short to ground on the circuit.
    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 K9 Body Control Module.
    • If greater than 10 V 
  5. Test or replace the A23D Door Latch Assembly-Driver.