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For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 2005 🢒 XLR 🢒 Accessories 🢒 Navigation Systems 🢒 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/Hatch/Liftglass Release Output Circuit

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 relay control when output is active.

B3265 06

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

Action Taken When the DTC Sets

B3265 01

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

B3265 06

The BCM disables the trunk 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 the OFF states. Repeat the commands as necessary.

    2.

  2. Verifies that the BCM is providing voltage to the trunk release relay.

    3.

  3. Tests for an open in the ground circuit to the trunk release relay.

    4.

  4. Tests for constant voltage to the trunk release relay.

    5.

  5. Test the trunk release relay control circuit for a short to ground or open.

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. Turn ON the ignition, with the engine OFF.
  2. With a scan tool, command the trunk release relay ON and OFF.

Does the trunk release relay 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. Disconnect the trunk release relay.
  3. Turn ON the ignition, with the engine OFF.
  4. Connect a test lamp to ground.

    5. Probe the control circuit of the trunk release relay with the test lamp.

  5. With a scan tool, command the trunk release relay ON and OFF.

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

Go to Step 4

Go to Step 5

4

  1. Connect a test lamp across the control circuit of the trunk release relay and the ground circuit of the trunk release relay.
  2. With a scan tool, command the trunk release relay ON and OFF.

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

Go to Step 8

Go to Step 10

5

Does the test lamp remain illuminated with each command?

Go to Step 7

Go to Step 6

6

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

Did you find and correct the condition?

Go to Step 13

Go to Step 9

7
  1. Turn ON the ignition, with the engine OFF.
  2. Test the control circuit of the trunk release relay for a short to voltage. Refer to Circuit Testing and to Wiring Repairs .

Did you find and correct the condition?

Go to Step 13

Go to Step 9

8

Inspect for poor connections at the trunk release relay. Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs .

Did you find and correct the condition?

Go to Step 13

Go to Step 11

9

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

Did you find and correct the condition?

Go to Step 13

Go to Step 12

10

Repair the ground circuit of the trunk release relay. Refer to Wiring Repairs .

Did you complete the repair?

Go to Step 13

--

11

Replace the trunk release relay.

Did you complete the replacement?

Go to Step 13

--

12

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

Did you complete the replacement?

Go to Step 13

--

13
  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