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Home >> Chevrolet >> 2015 >> Cruze LT, Automatic Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 75 (Power Door Lock System And Release Systems) >> Diagnostic Information and Procedures >> Door Ajar Indicator Malfunction >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2015 Chevrolet Trax and 2015 Buick Encore. However, it is still accessible from the selected car via links, so may be relevant.

Door Ajar Malfunction

  1. Ignition OFF and all vehicle systems OFF, disconnect the harness connector at the appropriate 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.
    • A23D Door Latch Assembly-Driver - ground circuit terminal 8
    • A23P Door Latch Assembly-Passenger - ground circuit terminal 3
    • A23LR Door Latch Assembly-Left Rear - ground circuit terminal 8
    • A23RR Door Latch Assembly-Right Rear - ground circuit terminal 3
    • 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. Verify the appropriate scan tool Door Ajar Switch parameter is Inactive.
    • If not Inactive 
    1. Ignition OFF, disconnect the harness connector at the appropriate component listed below:
      • M74D Window Motor-Driver (AXG)
      • S79D Window Switch-Driver (AEC)
      • M74P Window Motor-Passenger (AEF)
      • S79P Window Switch-Passenger (AED)
      • M74LR Window Motor-Left Rear (AER)
      • S79LR Window Switch-Left Rear (AEQ)
      • M74RR Window Motor-Right Rear (AER)
      • S79RR Window Switch-Right Rear (AEQ)
      • K9 Body Control Module (A55, A66, A33 or crank windows)
    2. Test for infinite resistance between the signal circuit terminal listed below and ground.
      • A23D Door Latch Assembly-Driver - signal circuit terminal 6
      • A23P Door Latch Assembly-Passenger - signal circuit terminal 1
      • A23LR Door Latch Assembly-Left Rear - signal circuit terminal 6
      • A23RR Door Latch Assembly-Right Rear - signal circuit terminal 1
      • If less than infinite resistance, repair the short to ground on the circuit.
      • If infinite resistance, replace the appropriate component.
    • If Inactive 
  5. Install a 3 A fused jumper wire between the signal circuit terminal listed below and ground.
    • A23D Door Latch Assembly-Driver - signal circuit terminal 6
    • A23P Door Latch Assembly-Passenger - signal circuit terminal 1
    • A23LR Door Latch Assembly-Left Rear - signal circuit terminal 6
    • A23RR Door Latch Assembly-Right Rear - signal circuit terminal 1
  6. Verify the scan tool Door Ajar Switch parameter is Active.
    • If not Active 
    1. Ignition OFF, remove the fused jumper wire, disconnect the harness connector at the appropriate component listed below, ignition ON.
      • M74D Window Motor-Driver (AXG)
      • S79D Window Switch-Driver (AEC)
      • M74P Window Motor-Passenger (AEF)
      • S79P Window Switch-Passenger (AED)
      • M74LR Window Motor-Left Rear (AER)
      • S79LR Window Switch-Left Rear (AEQ)
      • M74RR Window Motor-Right Rear (AER)
      • S79RR Window Switch-Right Rear (AEQ)
      • K9 Body Control Module (A55, A66, A33 or crank windows)
    2. 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
    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 appropriate component.
    • If Active 
  7. Test or replace the A23 Door Latch Assembly.

Liftgate Ajar Switch

  1. Ignition OFF and all vehicle systems OFF, disconnect the harness connector at the M30 Liftgate Latch. 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. Ignition ON.
  4. Verify the scan tool Rear Closure Ajar Switch parameter is Inactive.
    • If not Inactive 
    1. Ignition OFF, disconnect the harness connector at the K9 Body Control Module.
    2. Test for infinite resistance between the signal circuit terminal 2 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 Inactive 
  5. Install a 3 A fused jumper wire between the signal circuit terminal 2 and ground circuit terminal 1.
  6. Verify the scan tool Rear Closure Ajar Switch parameter is Active.
    • If not Active 
    1. Ignition OFF, remove the fused jumper wire, disconnect the harness connector at the K9 Body Control Module, ignition ON.
    2. 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
    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 Active 
  7. Test or replace the M30 Liftgate Latch.
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