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HOMESERVICE MANUALSCHEVROLET2014EQUINOX LS, FWD, GAS/ETHANOLREPAIR AND DIAGNOSIS (SINGLE PAGE)BODY & FRAMEDOOR LOCKSPOWER DOOR LOCK SYSTEM AND RELEASE SYSTEMSDIAGNOSTIC INFORMATION AND PROCEDURESDTC B153A: LIFTGATE LATCH SWITCHES MALFUNCTIONCIRCUIT/SYSTEM TESTING
2014 Chevrolet Equinox LS, FWD, Gas/Ethanol

Circuit/System Testing

2014 Chevrolet Equinox LS, FWD, Gas/EthanolSECTION Circuit/System Testing
  1. Ignition OFF and all vehicle systems OFF, disconnect the harness connector at the A23C liftgate 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 low reference circuit terminal 2 and ground.
    • If 10 Ω or greater 
    1. Ignition OFF.
    2. Test for less than 2 Ω in the low reference 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 low reference connection.
    • If less than 10 Ω 
  3. Ignition ON.
  4. Verify the scan tool Liftgate Latch Pawl Switch parameter is Closed.
    • If not Closed 
    1. Ignition OFF, disconnect the harness connector at the K39 liftgate 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.
      • If infinite resistance, replace the K39 liftgate control module.
    • If Closed 
  5. Install a 3 A fused jumper wire between the signal circuit terminal 5 and the low reference circuit terminal 2.
  6. Verify the scan tool Liftgate Latch Pawl Switch parameter is Open
    • If not Open 
    1. Ignition OFF, disconnect the harness connector at the K39 liftgate control module, ignition ON.
    2. Test for less than 1 V between the signal circuit terminal 5 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 K39 liftgate control module.
    • If Open 
  7. Verify the scan tool Liftgate Latch Ratchet Switch parameter is Closed.
    • If not Closed 
    1. Ignition OFF, disconnect the harness connector at the K39 liftgate control module.
    2. Test for infinite resistance between the signal circuit terminal 6 and ground.
      • If less than infinite resistance, repair the short to ground on the circuit.
      • If infinite resistance, replace the K39 liftgate control module.
    • If Closed 
  8. Install a 3 A fused jumper wire between the signal circuit terminal 6 and the low reference circuit terminal 2.
  9. Verify the scan tool Liftgate Latch Ratchet Switch parameter is Open
    • If not Open 
    1. Ignition OFF, disconnect the harness connector at the K39 liftgate control module, ignition ON.
    2. Test for less than 1 V between the signal circuit terminal 6 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 K39 liftgate control module.
    • If Open 
  10. Verify the scan tool Liftgate Latch Sector Switch parameter is Inactive.
    • If not Inactive 
    1. Ignition OFF, disconnect the harness connector at the K39 liftgate control module.
    2. Test for infinite resistance between the signal circuit terminal 4 and ground.
      • If less than infinite resistance, repair the short to ground on the circuit.
      • If infinite resistance, replace the K39 liftgate control module.
    • If Inactive 
  11. Install a 3 A fused jumper wire between the signal circuit terminal 4 and the low reference circuit terminal 2.
  12. Verify the scan tool Liftgate Latch Sector Switch parameter is Active
    • If not Active 
    1. Ignition OFF, disconnect the harness connector at the K39 liftgate control module, ignition ON.
    2. Test for less than 1 V between the signal circuit terminal 4 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 K39 liftgate control module.
    • If Active 
  13. Test or replace the A23C liftgate latch assembly.
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.