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For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2005 🢒 Cobalt 🢒 Restraints 🢒 SIR 🢒 DTC B3265

Circuit Description

The body control module (BCM) provides a low side drive output that controls the trunk release relay.

DTC Descriptor

This diagnostic procedure supports the following DTC:

DTC B3265 Trunk Relay Output

DTC Symptom

DTC Symptom Descriptor

01

Short to battery

06

Short to ground or open

Conditions for Running the DTC

The only requirements are valid operating voltage and ground.

Conditions for Setting the DTC

All of the following conditions exist for more than 1 second:

B3265 01

The BCM detects a short to battery in the trunk release relay control when the output is active.

B3265 06

The BCM detects a short to ground or an open in the trunk release relay control when the output is inactive.

Action Taken When the DTC Sets

B3265 01

The BCM disables the trunk release relay control until the next ignition cycle.

B3265 06

The BCM disables the trunk release relay control until the next ignition cycle.

Conditions for Clearing the DTC
    • A current DTC clears when the malfunction is no longer present.
    • A history DTC clears when the module ignition cycle counter reaches the reset threshold, without a repeat of the malfunction.

Test Description

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

  1. During the trunk release relay operation, listen for an audible click. Command the ON and OFF states. Repeat the commands, as necessary.

    2.

  2. This step tests for a short to voltage in the trunk release relay control circuit between the TRUNK/OUTLET fuse and the BCM.

    3.

  3. This step tests for an open in the trunk release relay control circuit between the TRUNK/OUTLET fuse and the BCM.

    4.

  4. This step verifies the BCM is providing a ground to the trunk release relay.

Step

Action

Yes

No

Schematic Reference: Body Rear End Schematics

Connector End View Reference: Body Rear End Connector End Views

1

Did you perform the Diagnostic System Check - Vehicle?

Go to Step 2

Go to Diagnostic System Check - Vehicle

2

  1. Install a scan tool.
  2. Turn ON the ignition, with the engine OFF.
  3. From the Special Functions, Miscellaneous Test, Trunk Release screen, command the Trunk Release Solenoid ON and OFF.

Does the Trunk Release Solenoid turn ON and OFF with each command?

Go to Testing for Intermittent Conditions and Poor Connections

Go to Step 3

3

  1. Turn OFF the ignition.
  2. Remove the TRUNK/OUTLET fuse from the underhood fuse block.
  3. Access the C1 harness connector of the body control module (BCM).
  4. Turn ON the ignition, with the engine OFF.
  5. With a test lamp connected to a good ground, probe the trunk release relay control circuit of the harness connector.

Does the test lamp illuminate?

Go to Step 8

Go to Step 4

4

  1. Turn OFF the ignition.
  2. Install the TRUNK/OUTLET fuse into the underhood fuse block.
  3. Turn ON the ignition, with the engine OFF.
  4. With the test lamp connected to a good ground, again probe the trunk release relay control circuit of the C1 harness connector.

Does the test lamp illuminate?

Go to Step 5

Go to Step 9

5

  1. With the test lamp connected to battery positive voltage, probe the trunk release relay control circuit of the C1 harness connector.
  2. Command the Trunk Release Solenoid ON and OFF.

Does the test lamp turn ON and OFF with each command?

Go to Step 6

Go to Step 11

6

Does the test lamp remain illuminated with each command?

Go to Step 7

Go to Step 10

7

Test the trunk release relay control circuit for a short to ground. Refer to Circuit Testing and Wiring Repairs .

Did you find and correct the condition?

Go to Step 14

Go to Step 11

8

Test the trunk release relay control circuit for a short to voltage. Refer to Circuit Testing and Wiring Repairs .

Did you find and correct the condition?

Go to Step 14

Go to Step 10

9

Test the trunk release relay control circuit for an open or a high resistance. Refer to Circuit Testing and Wiring Repairs .

Did you find and correct the condition?

Go to Step 14

Go to Step 10

10

Inspect for poor connections at the underhood fuse block. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .

Did you find and correct the condition?

Go to Step 14

Go to Step 12

11

Inspect for poor connections at the harness connector of the BCM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .

Did you find and correct the condition?

Go to Step 14

Go to Step 13

12

Replace the underhood fuse block. Refer to Rear Compartment Lid Latch Replacement .

Did you complete the replacement?

Go to Step 14

--

13

Replace the BCM. Refer to Control Module References for replacement, setup, and programming.

Did you complete the replacement?

Go to Step 14

--

14
  1. Use the scan tool in order to clear the DTCs.
  2. Operate the vehicle within the Conditions for Running the DTC.

Does the DTC reset?

Go to Step 2

System OK