LEMON Manuals: Even more car manuals for everyone
Home >> Buick >> 2012 >> Regal Base >> Repair and Diagnosis >> External Pages >> Different car >> Section 336 (Power Door Lock System And Release Systems) >> Diagnostic Information and Procedures >> Power Door Child Lock Malfunction >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2013 Buick Regal. However, it is still accessible from the selected car via links, so may be relevant.

Security Lockout Inoperative

  1. Ignition OFF and all vehicle systems OFF, disconnect the KR113 Child Security Lock Disable Relay 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 1 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.
    • If less than 10 Ω 
  3. Connect a test lamp between the control circuit terminal 3 and the ground circuit terminal 1.
  4. Verify the test lamp turns ON and OFF when commanding the Child Security Lock Motors ON and OFF with a scan tool.
    • If the test lamp is always OFF  
    1. Ignition OFF, remove the test lamp, disconnect the harness connector at the K9 Body Control Module.
    2. Test for infinite resistance between the control 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 control 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 test lamp is always ON 
    1. Ignition OFF, remove the test lamp, disconnect the harness connector at the K9 Body Control Module, ignition ON.
    2. Test for less than 1 V between the control circuit and ground.
      • If 1 V or greater, repair the short to voltage on the circuit.
      • If less than 1 V, replace the K9 Body Control Module.
    • If the test lamp turns ON and OFF 
  5. Test or replace the KR113 Child Security Lock Disable Relay.

Single Door Security Lockout Malfunction

  1. Ignition OFF, disconnect the harness connector at the appropriate rear A23 Door Latch Assembly. Ignition ON.
  2. Connect a test lamp between control circuit terminals listed below:
    • A23LR Door Latch Assembly-Left Rear - control circuit terminal 4 and control circuit terminal 7
    • A23RR Door Latch Assembly-Right Rear - control circuit terminal 2 and control circuit terminal 9
  3. Verify the test lamp turns ON and OFF when commanding the Child Security Lock Motors ON and OFF with a scan tool.
    • If the test lamp remains OFF during either of the commands 
    1. Ignition OFF, remove the test lamp, disconnect the harness connector at the K9 Body Control Module.
    2. Test for infinite resistance between each control circuit and ground.
      • If less than infinite resistance, repair the short to ground on the circuit.
      • If infinite resistance, replace the K9 Body Control Module.
    • If the test lamp turns ON during each of the commands 
  4. Test or replace the rear A23 Door Latch Assembly.

Rear Window Lockout Inoperative

  1. Ignition OFF and all vehicle systems OFF, disconnect the harness connector at the appropriate rear A23 Door Latch Assembly. 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:
    • A23RR Door Latch Assembly-Right Rear - ground terminal 3
    • A23LR Door Latch Assembly-Left Rear - ground terminal 8
    • 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 terminal listed below and ground:
    • A23RR Door Latch Assembly-Right Rear - signal terminal 4
    • A23LR Door Latch Assembly-Left Rear - signal terminal 9
    • If less than 10 V 
    1. Ignition OFF, disconnect the X6 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.
      • 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 on the circuit.
      • If less than 2 Ω, replace the K9 Body Control Module.
    • If greater than 10 V 
  5. Test or replace the rear A23 Door Latch Assembly.
scientia non olet · About LEMON Manuals