GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Pontiac 🢒 2001 🢒 Aztek - FWD 🢒 DTC 🢒 DTC B3064 or B3069

Circuit Description

The LF and RF door lock cylinder switches provide a ground input to the body control module (BCM) when either of the switches are turned to the unlock position. This input is needed for the optional content theft deterrent system when the keyless entry feature does not unlock the doors.

Conditions for Setting the DTC

The body control module (BCM) detects the door lock key switch signal circuit as continuously active for greater than 60 seconds.

Action Taken When the DTC Sets
    • The body control module (BCM) stores DTC B3069 in memory.
    • The BCM will disable the input and all operations of the input until the fault no longer exists.

Conditions for Clearing the DTC
    • The body control module (BCM) no longer detects the short to ground for greater than 60 seconds.
    • 100 consecutive ignition cycles have been recorded without the DTC being detected.

Diagnostic Aids
    • If the DTC B3069 is a history DTC, the fault may be intermittent. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.
    • The following conditions may cause an intermittent malfunction to occur:
       - An intermittent short to ground in the key unlock input circuit
       - The key cylinder switch is intermittently shorted to ground internally
       - The BCM is intermittently shorted to ground internally

Test Description

The numbers below refer to the step numbers on the diagnostic table.

  1. Determines whether the short to ground in the key cylinder unlock circuit is current or intermittent.

  1. Determines whether the short to ground is in the door lock cylinder switches or the door lock key switch unlock signal circuit.

  1. Determines whether the LF or RF door lock cylinder switch is shorted to ground.

Step

Action

Yes

No

1

Did you perform the Door System Diagnostic System Check?

Go to Step 2

Go to Diagnostic System Check - Door Systems

2

  1. Install a scan tool.
  2. Turn ON the ignition, with the engine OFF.
  3. With a scan tool, observe the Key Cylinder Unlock parameter in the body control module (BCM) Input data list.

Does the scan tool indicate that the Key Cylinder Unlock parameter is Inactive?

Go to Diagnostic Aids

Go to Step 3

3

  1. Turn OFF the ignition.
  2. Disconnect the LF and RF door lock cylinder switches.
  3. Turn ON the ignition, with the engine OFF.
  4. With a scan tool, observe the Key Cylinder Unlock parameter in the body control module (BCM) Input data list.

Does the scan tool indicate that the Key Cylinder Unlock parameter is Inactive?

Go to Step 4

Go to Step 5

4

  1. Turn OFF the ignition.
  2. Connect the LF door lock cylinder switch.
  3. Turn ON the ignition, with the engine OFF.
  4. With a scan tool, observe the Key Cylinder Unlock parameter in the body control module (BCM) Input data list.

Does the scan tool indicate that the Key Cylinder Unlock parameter is Inactive?

Go to Step  7

Go to Step 8

5

Test the door lock key switch unlock signal circuit for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step  10

Go to Step 6

6

Inspect for poor connections at the harness connector of the body control module. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step  10

Go to Step 9

7

Replace the RF door lock cylinder switch. Refer to Front Side Door Lock Actuator Replacement .

Did you complete the replacement?

Step  10

--

8

Replace the LF door lock cylinder switch. Refer to Front Side Door Lock Actuator Replacement .

Did you complete the replacement?

Go to Step  10

--

9
  1. Replace the body control module. Refer to Body Control Module Replacement in Body Control System.
  2. Perform the set up procedure for the Body Control Module. Refer to Body Control Module (BCM) Programming/RPO Configuration in Body Control System.

Did you complete the replacement?

Go to Step  10

--

10
  1. Use the scan tool in order to clear the DTCs.
  2. Operate the vehicle within the conditions for running the DTC as specified in the supporting text.

Does the DTC reset?

Go to Step 2

System OK