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. |
DTC Descriptors
DTC B3265 01: Trunk Release Output Circuit Short to BatteryDTC B3265 06: Trunk Release Output Circuit Short to Ground or Open
Diagnostic Fault Information
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
Trunk Relay B+ | B3265 06 | B3265 06 | -- | -- |
Trunk Release Switch Signal | 2 | 2 | 2 | -- |
Rear Compartment Lid Latch Control | B3265 06 | 1 | 1 | -- |
Trunk Release Relay Control | B3265 06 | B3265 06 | B3265 01 | -- |
Rear Compartment Lid Latch Ground | -- | 1 | 1 | -- |
Rear Compartment Lid Release Switch Ground | -- | 2 | 2 | -- |
1. Trunk release is inoperative from both the switch and keyless entry transmitter 2. Trunk release is inoperative only from switch | ||||
Circuit/System Description
The body control module (BCM) provides a low side drive output that controls the trunk relay. The BCM monitors the voltage level on the trunk release relay control circuit to determine when a failure has occurred. The voltage level on this circuit should be high while the trunk relay is not energized, that is; the trunk release feature has not been activated. Voltage will be near 0 volt when the relay is energized. When the BCM receives a trunk release signal from a switch or keyless entry transmitter, it responds by applying ground to the trunk release relay control circuit, which energizes the trunk relay.
Conditions for Running the DTC
Battery voltage must be between 9-16 volts
Conditions for Setting the DTC
B3265 01
The BCM detects a short to battery in the trunk release relay control circuit when the output is active.
B3265 06
The BCM detects a short to ground or an open in the trunk release relay control circuit when the output is inactive.
Action Taken When the DTC Sets
The BCM disables the trunk release relay control until the next ignition cycle.
Conditions for Clearing the DTC
| • | The DTC will be current for as long as the fault is present. |
| • | When the fault is no longer present, the DTC will be a history DTC. |
| • | A history DTC will clear after 50 ignition cycles. |
Diagnostic Aids
B3265 06 will also set anytime the TRUNK fuse is open. Besides a short to ground on the relay coil B+ circuit or the relay switch B+ circuit, a short to ground on the rear compartment lid release actuator control circuit can cause the fuse to open.
Reference Information
Schematic Reference
Connector End View Reference
Description and Operation
Luggage Compartment Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
Ignition ON, command the trunk release with a scan tool. The rear compartment lid release actuator should release the trunk lid.
Circuit/System Testing
- Ignition OFF, disconnect the TRUNK relay.
- Ignition ON, verify that a test lamp illuminates between the B+ circuit terminal 85 and ground.
- Connect a test lamp between the control circuit terminal 86 and the B+ circuit terminal 85.
- Command the trunk release ON and OFF with a scan tool. The test lamp should turn ON and OFF when changing between the commanded states.
- If all circuits test normal, test or replace the TRUNK relay.
| ⇒ | If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance. If the circuit tests normal and the B+ circuit fuse is open, test the control circuit terminal 87 for a short to ground. |
| ⇒ | If the test lamp is always ON, test the control circuit for a short to ground. If the circuit tests normal, replace the BCM. |
| ⇒ | If the test lamp is always OFF, test the control circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the BCM |
Component Testing
Relay
- Ignition OFF, disconnect the TRUNK relay.
- Test for 65-90 ohms between terminals 85 and 86.
- Test for infinite resistance between the following terminals:
- Install a 10 amp fused jumper wire between relay terminal 85 and 12 volts. Install a jumper wire between relay terminal 86 and ground. Test for less than 2 ohms between terminals 30 and 87.
| ⇒ | If not within the specified range, replace the relay. |
| • | 30 and 86 |
| • | 30 and 87 |
| • | 30 and 85 |
| • | 85 and 87 |
| ⇒ | If not the specified value, replace the relay. |
| ⇒ | If greater than the specified range, replace the relay. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
| • | Control Module References for BCM replacement, setup, and programming |
