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Circuit/System Testing

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Driver Door Lock Malfunction

  1. Ignition OFF, verify the harness connector for the driver door latch is firmly seated and secure.
    • If not the specified condition, seat and secure the connector and perform the Circuit/System Verification.
  2. If the harness connector for the driver door latch is firmly seated and secure, refer to Driver Door Lock Circuit Testing below.

Driver Door Lock Circuit Testing

  1. Ignition OFF, disconnect the harness connector at the driver door latch.
  2. Test for less than 2 Ω between the control circuit terminal 3 and ground.
    • If greater than the specified range, test the control circuit for a short to voltage or an open/high resistance. If circuits test normal, replace the driver door lock/window switch.
  3. Test for less than 2 Ω between the control circuit terminal 2 and ground.
    • If greater than the specified range, test the control circuit for a short to voltage or an open/high resistance. If circuits test normal, replace the driver door lock/window switch.
  4. Ignition ON, connect a test lamp between the control circuit terminal 3 and control circuit terminal 2.
  5. Command the Door Lock/Unlock with a scan tool. The test lamp should briefly illuminate when commanding the LOCK and UNLOCK states.
    • If the test lamp is always OFF during either of the commands, test either control circuit for a short to ground. If the circuits test normal, replace the driver door lock/window switch.
  6. If the circuits test normal, test or replace the driver door latch.

Passenger Door Lock Malfunction

  1. Ignition OFF, verify the harness connector for the passenger door latch is firmly seated and secure.
    • If not the specified condition, seat and secure the harness connector and perform the Circuit/System Verification.
  2. If the harness connector for the passenger door latch is firmly seated and secure, refer to Passenger Door Lock Circuit Testing below.

Passenger Door Lock Circuit Testing

  1. Ignition OFF, disconnect the harness connector at the passenger door latch.
  2. Test for less than 2 Ω between the control circuit terminal 5 and ground.
    • If greater than the specified range, test the control circuit for a short to voltage or an open/high resistance. If circuits test normal, replace the passenger door lock/window switch.
  3. Test for less than 2 Ω between the control circuit terminal 6 and ground.
    • If greater than the specified range, test the control circuit for a short to voltage or an open/high resistance. If circuits test normal, replace the passenger door lock/window switch.
  4. Ignition ON, connect a test lamp between the control circuit terminal 5 and control circuit terminal 6.
  5. Command the door to LOCK and UNLOCK by using the passenger door lock/window switch. The test lamp should briefly illuminate when commanding the LOCK and UNLOCK states.
    • If the test lamp remains OFF during either of the commands, test either control circuit for a short to ground. If the circuits test normal, replace the passenger door lock/window switch.
  6. If the circuits test normal, test or replace the passenger door latch.

Rear Door Lock Malfunction

  1. Ignition OFF, verify the harness connector for the appropriate rear door latch is firmly seated and secure.
    • If not the specified condition, seat and secure the harness connector and perform the Circuit/System Verification.
  2. If the harness connector for the rear door latch is firmly seated and secure, refer to Rear Door Lock Circuit Testing below.

Rear Door Lock Circuit Testing

  1. Ignition OFF, disconnect the harness connector at the appropriate rear door latch.
  2. Ignition ON, connect a test lamp between the control circuit terminals of the door latch listed below:
    • Terminal 2 and terminal 3 - left rear door latch
    • Terminal 5 and terminal 6 - right rear door latch
  3. Command the rear door to LOCK and UNLOCK with a scan tool. The test lamp should briefly illuminate when commanding the LOCK and UNLOCK states.
    • If the test lamp does not illuminate during either of the commands and the circuit fuse is open, test either control circuit for a short to ground. If the circuits test normal, test or replace the rear door latch.
    • If the test lamp does not illuminate during either of the commands and the circuit fuse is good, test either control circuit for an open/high resistance. If the circuits test normal, refer to I/P Fuse Block Test below.
  4. If all circuits test normal, test or replace the rear door latch.

I/P Fuse Block Test

  1. Ignition OFF, disconnect the X1 harness connector at the I/P fuse block.
  2. Test for less than 1 Ω between the ground circuit terminal E1 and ground.
    • If greater than the specified range, test the ground circuit for an open/high resistance.
  3. Connect the X1 harness connector and disconnect the X3 harness connector at the I/P fuse block.
  4. Connect a test lamp between control circuit terminal A2 and ground.
  5. Ignition ON, command the doors to LOCK with a scan tool. The test lamp should briefly illuminate during the LOCK command.
    • If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the BCM.
    • If the test lamp is always OFF, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the BCM.
  6. Connect a test lamp between control circuit terminal A3 and B+.
  7. Command the doors to UNLOCK with a scan tool. The test lamp should briefly illuminate during the UNLOCK command.
    • If the test lamp is always ON, test the control circuit for a short to ground. If the circuit tests normal, replace the BCM.
    • If the test lamp is always OFF, test the control circuit for a short to voltage or and open/high resistance. If the circuit tests normal, replace the BCM.
  8. If all circuits test normal, replace the I/P fuse block.
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