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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 Switch Signal

B2516 00

2

2

--

Passenger Door Handle Switch Signal

B1474 02

1

1

--

Passenger Door Handle Lock Switch Signal

B3155 00

2

2

--

Left Rear Door Handle Switch Signal

B1534 02

1

1

--

Right Rear Door Handle Switch Signal

B1535 02

1

1

--

Driver Door Handle Switch Ground

--

1

1

--

Driver Door Handle Lock Switch Ground

--

2

--

--

Passenger Door Handle Switch Ground

--

1

1

--

Passenger Door Handle Lock Switch Ground

--

2

--

--

Left Rear Door Handle Switch Ground

--

1

1

--

Right Rear Door Handle Switch Ground

--

1

1

--

1. Power Door Catch Malfunction

2. Door Handle Lock Switch Malfunction

Circuit/System Description

When any exterior door handle is lifted, switched ground signals are sent to the keyless entry control module through the door handle switch signal circuits. If the status of the door lock system is Unlock, the power door catches will electrically release after lifting the exterior door handle. If the status of the door lock system is Lock, one of the following inputs will be required before the catch will release.

    • A door unlock switch activation
    • A door key cylinder unlock switch activation
    • An active keyless entry unlock command
    • A passive keyless entry unlock command message is received by the keyless entry control module

Once the enable criteria have been met, the keyless entry control module will supply power and ground to the door catch motor control circuits and the door will release.

Diagnostic Aids

Note: 

   • Using the power door unlock switch or manually unlocking the doors does not disable the content theft deterrent arm mode. Also, disconnecting the battery or pulling fuses does not disable the arm mode, since the body control module (BCM) stores the content theft deterrent mode status in memory.
   • If the door latch does not operate both electrically and mechanically, inspect the door latch and associated lock rods for a mechanical obstruction.

Reference Information

Schematic Reference

Door Lock/Indicator Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Power Door Locks 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, Exterior Passenger Door, Exterior Left Rear Door and Exterior Right Rear Door Handle Switch parameters while using the appropriate door handle. The parameter should change between Active and Inactive.
    2. ⇒If not the specified value, refer to Door Latch Malfunction.
  2. Observe the scan tool keyless entry control module Exterior Driver Door Handle Proximity Sensor parameter while using the driver door handle. The parameter should change between Active and Inactive.
    3. ⇒If the value does not change between commanded states, refer to Door Handle Lock Switch Malfunction.
  3. Observe the scan tool keyless entry control module Exterior Passenger Door Handle Proximity Sensor parameter while using the passenger door handle. The parameter should change between Active and Inactive.
    4. ⇒If the value does not change between commanded states, refer to Door Handle Lock Switch Malfunction.
  4. Ignition OFF, lock the vehicle and move the vehicle key outside the passive entry aerial receiving range.
  5. Command the Driver Door Unlatch and Passenger Door(s) Unlatch with a scan tool, the doors should perform the Unlatch command.
    6. ⇒If any door catch is inoperative, refer to Door Catch Assembly Test.

Circuit/System Testing

Door Catch Malfunction

  1. Ignition OFF, disconnect the harness connector at the malfunctioning door handle switch.
  2. Test for less than 10 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, test for greater than 11 V between the signal circuit terminal 2 and ground.
    4. ⇒If less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K84 Keyless Entry Control Module.
  4. Verify the following scan tool parameter is Inactive.
    5. • Exterior Driver Door Handle Switch
    • Exterior Passenger Door Handle Switch
    • Exterior Left Rear Door Handle Switch
    • Exterior Right Rear Door Handle Switch
    ⇒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.
  5. Install a 3 A fused jumper wire between the signal circuit terminal 2 and ground. Verify the following scan tool parameter is Active.
    6. • Exterior Driver Door Handle Switch
    • Exterior Passenger Door Handle Switch
    • Exterior Left Rear Door Handle Switch
    • Exterior Right Rear Door Handle Switch
    ⇒If not the specified value, test the signal circuit terminal 2 for an open/high resistance. If the circuit tests normal, replace the K84 Keyless Entry Control Module.
  6. If all circuits test normal, test or replace the exterior door handle switch.

Door Handle Lock Switch Malfunction

  1. Ignition OFF, disconnect the harness connector at the inoperative 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 Door Handle Proximity Sensor parameter is Inactive.
    4. ⇒If not the specified value, test the signal circuit terminal 3 for a short to ground. If the circuit tests normal, replace the K84 Keyless Entry Control Module.
  4. Connect the a 3 A jumper harness between the signal circuit terminal 3 and ground. Verify the scan tool Exterior Door Handle Proximity Sensor parameter is Active.
    5. ⇒If not the specified value, test the signal circuit terminal 3 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, replace the inoperative keyless entry aerial - door handle.

Component Testing

Exterior Door Handle Switch Test

  1. Ignition OFF, disconnect the harness connector at the appropriate exterior 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 exterior 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 exterior door handle switch.

Door Catch Assembly Test

  1. Ignition OFF, disconnect the harness connector at the appropriate door latch.
  2. Ignition ON, install a 15 A fused jumper wire between the control terminal listed below and B+:
    3. • Left-hand drive: Driver door catch control terminal 10
    • Left-hand drive: Passenger door catch control terminal 5
    • Right-hand drive: Driver door catch control terminal 5
    • Right-hand drive: Passenger door catch control terminal 10
    • Left rear door catch control terminal 10
    • Right rear door catch control terminal 5
  3. Momentarily install a jumper wire between the control terminal listed below and ground. The door catch should perform the Unlock function:
    4. • Left-hand drive: Driver door catch control terminal 5
    • Left-hand drive: Passenger door catch control terminal 10
    • Right-hand drive: Driver door catch control terminal 10
    • Right-hand drive: Passenger door catch control terminal 5
    • Left rear door catch control terminal 5
    • Right rear door catch control terminal 10
    ⇒If the function does not perform as specified, replace the door catch.
  4. Reverse the jumper wires. The door catch assembly should perform the Lock function.
    5. ⇒If the function does not perform as specified, replace the door catch.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

    •  Relay Replacement : Attached to Wire Harness
    •  Front Side Door Outside Handle Replacement
    • Control Module References for control module replacement, setup, and programming
   


© Copyright Chevrolet. All rights reserved
   


© Copyright Chevrolet. All rights reserved