GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 1999 🢒 Century (China) (CNG) 🢒 DTC 🢒 DTC B3267 Decklid Output Relay Short to GND/Open

Circuit Description

The rear compartment lid release circuit is completed by the BCM when it receives a truck release request from the RCDLR trunk release button and the vehicle is in the PARK position. The BCM grounds circuit 253, energizing the rear compartment lid release relay.

Conditions for Setting the DTC

The BCM detects a short to ground or an open in circuit 253.

Action Taken When the DTC Sets

The BCM stores DTC B3267 in memory.

Conditions for Clearing the DTC
    • The BCM detects a short to ground in circuit 253.
    • A history DTC will clear after 100 consecutive ignition cycles if the condition for the malfunction is no longer present.
    • Using a scan tool.

Diagnostic Aids
    • The following conditions may cause an intermittent malfunction to occur:
       - An intermittent open or short to ground in circuit 253.
       - Poor connections at the BCM, or the rear compartment lid release relay terminals.
    • The rear compartment lid release relay coil is open.
    • The BCM is open or shorted to ground internally.
    • An intermittent open in circuit 1540.
    • If the DTC is a history DTC, the problem may be intermittent. Try performing the tests shown while moving wiring and connectors, this can often cause the malfunction to reappear.
    • DTC P1626 will set in the Powertrain Control Module (PCM) when the ignition switch is on with the Body Control module (BCM) disconnected. When BCM diagnostics and repairs are completed, refer to Powertrain On Board Diagnostic (OBD) System Check in Engine Controls for additional information on PCM related DTCs.

Test Description

The number(s) below refer to the step number(s) on the diagnostic table.

  1. This step checks for voltage in circuit 253.

    2.

  2. The step determines whether the malfunction is intermittent or the BCM is faulty.

    3.

  3. This step checks for a short to ground in circuit 253.

    4.

  4. This step determines whether the short to ground is in circuit 253 or the rear compartment lid release relay is faulty.

    5.

  5. This step checks for an open in circuit 253.

    6.

  6. This step determines whether the circuit 1540 is open or the rear compartment lid release relay is faulty.

Step

Action

Value(s)

Yes

No

1

Was the BCM Diagnostic System Check performed?

--

Go to Step 2

Go to Diagnostic System Check - Body Control System

2

  1. Turn the ignition switch in the OFF position.
  2. Disconnect the Body Control Module (BCM) connector C2.
  3. Turn the ignition switch in the ON position.
  4. Using a test light, connect between the BCM harness connector C2 terminal B12 and ground.

Is the test light on?

--

Go to Step 3

Go to Step 4

3

  1. Reinstall connectors/ components removed.
  2. Turn the ignition switch in the ON position.
  3. Clear BCM DTCs. Refer to Clearing DTCs for more information.
  4. Check for BCM DTCs. Refer to Diagnostic Trouble Code (DTC) Displaying for more information.

Does BCM DTC B3267 reset as a current DTC?

--

Go to Step 9

Go to Step 13

4

Using a test light, connect between B+ and the BCM harness connector C2 terminal B12.

Is the test light on?

--

Go to Step 5

Go to Step 6

5

  1. Leave the test light in the same location from the previous step.
  2. Disconnect the rear compartment lid release relay connector.

Is the test light on?

--

Go to Step 10

Go to Step 7

6

Using a test light, connect between the rear compartment release relay harness connector terminal C2 and ground.

Is the test light on?

--

Go to Step 11

Go to Step 8

7

Replace the rear compartment lid release relay.

Is the repair complete?

--

Go to Step 14

--

8

Using a test light, connect between the rear compartment lid release relay harness connector terminal A1 and ground.

Is the test light on?

--

Go to Step 7

Go to Step 12

9
  1. Replace the BCM. Refer to Body Control Module Replacement for more information.
  2. After replacing the BCM, perform the Setup New BCM procedure. Refer to Body Control Module (BCM) Programming/RPO Configuration for more information.

Is the repair complete?

--

Go to Step 14

--

10

Repair short to ground in circuit 253 between the BCM connector C2 terminal B12 and the rear compartment lid release relay connector terminal C2.

Is the repair complete?

--

Go to Step 14

--

11

Repair poor connection or an open in circuit 253 between the BCM connector C2 terminal B12 and the rear compartment lid release relay connector terminal C2.

Is the repair complete?

--

Go to Step 14

--

12

Repair the poor connection or the open in circuit 1540.

Is the repair complete?

--

Go to Step 14

--

13

The malfunction is not present. Refer to Diagnostic Aids for additional information regarding DTC.

Is the repair complete?

--

Go to Step 14

--

14
  1. Turn the ignition switch to the OFF position.
  2. Reinstall connectors/components removed.
  3. Turn the ignition switch to the On position.
  4. Clear BCM DTCs. Refer to Clearing DTCs for more information.
  5. Check for BCM DTCs. Refer to Diagnostic Trouble Code (DTC) Displaying for more information.

Are any current BCM DTCs set?

--

Go to Diagnostic System Check - Body Control System

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