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Home >> Cadillac >> 2016 >> SRX Base >> Repair and Diagnosis >> Body & Frame >> Body, Cab Control Systems >> Power Door Lock System And Release Systems >> Diagnostic Information and Procedures >> Power Door Dead Lock Malfunction >> Circuit/System Testing

Circuit/System Testing

Security Lockout Inoperative

  1. Ignition OFF and all vehicle systems OFF, disconnect the X2 harness connector at the X53A Fuse Block-Rear Body. 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 27 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. Ignition OFF, connect the X2 harness connector at the X53A Fuse Block-Rear Body. Disconnect the X7 harness connector at the K9 Body Control Module, ignition ON.
  4. Verify that a test lamp does not illuminate between the control circuit terminal 10 and ground.
    • If the test lamp illuminates 
    1. Ignition OFF, remove the test lamp, disconnect the X2 harness connector at the X53A Fuse Block-Rear Body.
    2. Test for less than 1 V between the K9 Body Control Module control circuit terminal 10 X7 and ground.
      • If 1 V or greater, repair the short to voltage on the circuit.
      • If less than 1 V, replace the X53A Fuse Block-Rear Body.
    • If the test lamp is not illuminated 
  5. Connect a 3A fused jumper wire between the control circuit terminal 10 and B+.
  6. Listen as the KR114 Door Dead Lock Relay activates.
    • If the KR114 Door Dead Lock Relay does not activate 
    1. Ignition OFF, remove the jumper wire, disconnect the X2 harness connector at the X53A Fuse Block-Rear Body.
    2. Test for infinite resistance between the K9 Body Control Module control circuit terminal 10 X7 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 X53A Fuse Block-Rear Body.
    • If the KR114 Door Dead Lock Relay activates 
  7. Replace the K9 Body Control Module.

Single Door Security Lockout Malfunction

  1. Ignition OFF and all vehicle systems OFF, disconnect the harness connector at the appropriate A23 Door Latch Assembly.
  2. Connect a test lamp between control circuit terminals listed below, ignition ON.
    • A23D Door Latch Assembly - Driver control terminal 6 and control terminal 7
    • A23P Door Latch Assembly - Passenger control terminal 1 and control terminal 2
    • A23LR Door Latch Assembly - Left Rear control terminal 1 and control terminal 2
    • A23RR Door Latch Assembly - Right Rear control terminal 6 and control terminal 7
  3. Verify the test lamp turns ON and OFF when commanding the Door Dead Lock to LOCK and UNLOCK 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 A23 Door Latch Assembly.
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