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Circuit/System Testing

  1. Ignition OFF, disconnect the X1 harness connector at the A20 radio/HVAC controls. Ignition ON
  2. Install a 3 A fused jumper wire between the signal circuit terminal 5 and ground.
  3. Verify the scan tool Child Security Lock Motors Command parameter briefly changes to Active from Inactive.
    • If the parameter does not change 
    1. Ignition OFF, disconnect the harness connector at the K9 body control module.
    2. Test for infinite resistance between the signal circuit terminal 5 and ground.
      • If less than infinite resistance, repair the short to ground on the circuit.
    3. Ignition ON, 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
    4. 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 the parameter changes 
  4. Test or replace the A20 radio/HVAC controls.
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