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Power Door Catch System Malfunction

Diagnostic Instructions
    • Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
    • Review Strategy Based Diagnosis for an overview of the diagnostic approach.
    • Diagnostic Procedure Instructions provides an overview of each diagnostic category.

Diagnostic Fault Information

Circuit

Short to Ground

Open/High Resistance

Short to Voltage

Signal Performance

Driver Door Handle Switch Signal

B3849 02

1

1

--

Driver Door Handle Lock Signal

B2516 00

1

1

--

Passenger Door Handle Switch Signal

B1474 02

1

1

--

Passenger Door Handle Lock Signal

B3155 00

1

1

--

Left Rear Door Handle Switch Signal

B1534 02

1

1

--

Right Rear Door Handle Switch Signal

B1535 02

1

1

--

Driver Door Latch Control

B250B 02, B251B 02

2

B250B 01

-

Left Rear Door Latch Control

B251A 02, B251D 02

2

B251A 01

-

Passenger Door Latch Control

B251A 02, B251C 02

2

B251A 01

-

Right Rear Door Latch Control

B251A 02, B251E 02

2

B251A 01

-

Driver Door Handle Switch Ground

--

1

--

--

Passenger Door Handle Switch Ground

--

1

--

--

Left Rear Door Handle Switch Ground

--

1

--

--

Right Rear Door Handle Switch Ground

--

1

--

--

1. Door Handle Switch Malfunction

2. Door Unlatch Malfunction

Circuit/System Description

The system is designed so that when the operator approaches a locked vehicle with the keyless entry transmitter, the keyless entry control module will detect the keyless entry transmitter and when an exterior door handle is pulled the keyless entry control module will command all doors to unlock and the door to unlatch allowing the door to be pulled open.

Reference Information

Schematic Reference

    •  Door Lock/Indicator Schematics
    •  Remote Function Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Power Door Latch Description and Operation

Electrical Information Reference

    •  Circuit Testing
    •  Connector Repairs
    •  Testing for Intermittent Conditions and Poor Connections
    •  Wiring Repairs

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification
  1. Ignition ON, observe the scan tool keyless entry control module Exterior Driver Door Handle Switch, Exterior Passenger Door Handle Switch, Exterior Left Rear Door Handle Switch and Exterior Right Rear Door Handle Switch parameters while pulling and releasing each exterior door handle. The parameter for each should change between Active and Inactive.
    2. ⇒If a value for an exterior door handle is always Active or Inactive, refer to Exterior Door Handle Malfunction.
  2. Ignition OFF, with the doors closed and locked, approach the vehicle with the keyless entry transmitter and pull the exterior driver door handle. The driver door should unlock and unlatch allowing the driver door to be pulled open.
    3. ⇒If the driver door does not perform as specified, refer to Driver Door Latch Malfunction.
  3. With the doors closed and locked, approach the vehicle with the keyless entry transmitter and pull the exterior passenger door handle or the exterior left rear door handle or the exterior right rear door handle. The appropriate door should unlock and unlatch allowing the door to be pulled open.
    4. ⇒If all the doors do not perform as specified, refer to Passenger and Rear Door Release Command Inoperative.
    ⇒If a single door does not perform as specified, refer to Passenger or Rear Door Latch Malfunction.
  4. Observe the scan tool Exterior Driver Door Handle Touch Sensor parameter while pressing and releasing the B210D door handle touch sensor-driver exterior. The value should change between Active and Inactive as the sensor is pressed and released.
    5. ⇒If the value does not change, refer to Door Handle Lock Sensor Malfunction.
  5. Observe the scan tool Exterior Passenger Door Handle Touch Sensor parameter while pressing and releasing the B210P door handle touch sensor-passenger exterior. The value should change between Active and Inactive as the sensor is pressed and released.
    6. ⇒If the value does not change, refer to Door Handle Lock Sensor Malfunction.

Circuit/System Testing

Exterior Door Handle Malfunction

  1. Ignition OFF, disconnect the harness connector at the appropriate exterior B27 door handle switch.
  2. Test for less than 5 Ω between the ground circuit terminal 1 and ground.
    3. ⇒If greater than the specified range, test the ground circuit for an open/high resistance.
  3. Ignition ON, verify the appropriate scan tool Exterior Door Handle Switch parameter is Inactive.
    4. ⇒If not the specified value, test the signal circuit terminal 2 for a short to ground. If the circuit tests normal, replace the K84 keyless entry control module.
  4. Install a 3 A fused jumper wire between the signal circuit terminal 2 and the ground circuit terminal 1. Verify the scan tool Exterior Door Handle Switch parameter is Active.
    5. ⇒If not the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the K84 keyless entry control module
  5. If all circuits test normal, test or replace the B27 door handle switch.

Driver Door Latch Malfunction

  1. Ignition OFF, disconnect the X7 harness connector at the K9 BCM.
  2. Verify that a test lamp illuminates between the signal circuit terminal 5 and B+.
    3. ⇒If the test lamp does not illuminate, test the signal circuit tor a short to voltage or an open/high resistance. If the circuit test normal, replace the K84 keyless entry control module.
  3. Connect the X7 harness connector at the K9 BCM and disconnect the X4 harness connector at the K84 keyless entry control module.
  4. Test for infinite resistance between the signal circuit terminal 3 and ground.
    5. ⇒If not the specified value, test the signal circuit for a short to ground. If the circuit tests normal, replace the K9 BCM.
  5. Connect the X4 harness connector at the K84 keyless entry control module and disconnect the harness connector at the A23D door latch assembly - driver.
  6. Connect a test lamp between the control circuit terminal 5 and control circuit terminal 10.
  7. Ignition ON, pull and release the exterior driver door handle. The test lamp should briefly illuminate when pulling the exterior driver door handle.
    8. ⇒If the test lamp is always ON, test either control circuit for a short to voltage. If the circuit tests normal, replace the K84 keyless entry control module.
    ⇒If the test lamp is always OFF, test either control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K84 keyless entry control module.
  8. If all circuits test normal, test or replace the A23D door latch assembly - driver.

Passenger or Rear Door Latch Malfunction

  1. Ignition OFF, disconnect the X7 harness connector at the K9 BCM.
  2. Verify that a test lamp illuminates between the signal circuit terminal 17 and ground.
    3. ⇒If the test lamp does not illuminate, test the signal circuit tor a short to voltage or an open/high resistance. If the circuit test normal, replace the K84 keyless entry control module.
  3. Connect the X7 harness connector at the K9 BCM and disconnect the X4 harness connector at the K84 keyless entry control module.
  4. Test for infinite resistance between the signal circuit terminal 14 and ground.
    5. ⇒If not the specified value, test the signal circuit for a short to ground. If the circuit tests normal, replace the K9 BCM.
  5. Connect the X4 harness connector at the K84 keyless entry control module and disconnect the harness connector at the appropriate exterior A23 door latch assembly.
  6. Connect a test lamp between the control circuit terminal 5 and control circuit terminal 10.
  7. Ignition ON, pull and release the exterior door handle. The test lamp should briefly illuminate when pulling the exterior door handle.
    8. ⇒If the test lamp is always ON, test either control circuit for a short to voltage. If the circuit tests normal, replace the K84 keyless entry control module.
    ⇒If the test lamp does not illuminate, test either control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K84 keyless entry control module.
  8. If all circuits test normal, test or replace the exterior A23 door latch assembly.

Door Handle Lock Sensor Malfunction

  1. Ignition OFF, disconnect the harness connector at the appropriate T10 keyless entry aerial-door handle.
  2. Test for less than 5 Ω between the ground circuit terminal 4 and ground.
    3. ⇒If greater than the specified range, test the ground circuit for an open/high resistance.
  3. Ignition ON, verify the scan tool Exterior Passenger Door Handle Touch Sensor and the Exterior Driver Door Handle Touch Sensor parameter is Inactive.
    4. ⇒If not the specified value, test the appropriate signal circuit terminal 3 for a short to ground. If the circuit tests normal, replace the K84 keyless entry control module.
  4. Connect a 3 A fused jumper wire between the signal circuit terminal 3 and ground, verify the scan tool Exterior Door Handle Touch Sensor is Active.
    5. ⇒If not the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the K84 keyless entry control module.
  5. If all circuits test normal, test or replace the T10 keyless entry aerial-door handle.

Component Testing

Exterior Door Handle Switch Test

  1. Ignition OFF, disconnect the harness connector at the appropriate B27 door handle switch.
  2. With the switch in the open position, test for infinite resistance between the signal terminal 2 and the ground terminal 1.
    3. ⇒If not the specified value, replace the B27 door handle switch.
  3. With the switch in the closed position, test for less than 5 Ω between the signal terminal 2 and the ground terminal 1.
    4. ⇒If greater than the specified range, replace the B27 door handle switch.

Door Catch

  1. Ignition OFF, disconnect the wiring harness plug at the appropriate A23 door latch assembly.
  2. Install a 15 A fused jumper wire between one of the control terminals and 12 V. Momentarily install a jumper wire between the other control terminal and ground. Reverse the jumper wires at least two times, the A23 door latch assembly should perform the LOCK and UNLOCK functions.
    3. ⇒If it does not perform as specified, replace the A23 door latch assembly.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

    •  Front Side Door Outside Handle Replacement
    •  Front Side Door Catch Replacement
    •  Rear Side Door Catch Replacement
    •  Rear Side Door Outside Handle Replacement
    • Control Module References for BCM and the keyless entry control module replacement, programming and setup
   


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