• | 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. |
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
---|---|---|---|---|
Trunk Relay B+ | 1 | 1 | -- | -- |
Trunk Release Switch Signal | B2730 00 | 2 | 2 | -- |
Rear Compartment Lid Latch Control | 1 | 1 | 1 | -- |
Trunk Release Relay Control | B3265 00 | B3265 00 | B3265 00 | -- |
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 |
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 less than 1V 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.
The system voltage is 9-16 volts.
The BCM detects a fault in the trunk release relay control circuit when the output is active.
The rear compartment lid latch will malfunction.
• | The DTC will be current for as long as the fault is present. |
• | When the fault is no longer present, the DTC will become a history DTC. |
• | A history DTC will clear after 50 ignition cycles. |
Luggage Compartment Description and Operation
Control Module References for scan tool information
Command the Trunk Release Test with a scan tool. The rear compartment lid release actuator should release the trunk lid.
⇒ | 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 circuit tests normal, test or replace the TRUNK RELEASE relay. |
⇒ | 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. |
⇒ | If not within the specified range, replace the relay. |
• | 30 and 86 |
• | 30 and 87 |
• | 30 and 85 |
• | 85 and 87 |
⇒ | If less than the specified value, replace the relay. |
⇒ | If greater than the specified range, replace the relay. |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
• | Control Module References for BCM replacement, setup and programming |
• | 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. |
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
---|---|---|---|---|
Rear End Release Relay Switch B+ | 2 | 2 | -- | -- |
Liftgate Release Switch Signal | B2730 00 | 1 | 1 | -- |
Rear End Release Relay Coil Control | -- | 2 | 2 | -- |
Rear End Release Relay Coil Control | B3265 00 | 2 | 2 | -- |
Liftgate Latch Control | -- | 2 | 2 | -- |
Liftgate Latch Ground | -- | 2 | 2 | -- |
Liftgate Release Switch Ground | -- | 1 | 1 | -- |
1. Liftgate Release Switch Malfunction 2. Liftgate Release Malfunction |
The body control module (BCM) provides voltage to the liftgate release relay control circuit thus energizing the Rear End Release relay which provides voltage to the liftgate latch assembly releasing the liftgate.
The system voltage is 9-16 volts.
The BCM detects short to voltage in the liftgate latch relay coil control ground circuit.
The liftgate latch will malfunction.
• | 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. |
Rear Hatch/Gate Description and Operation
Control Module References for scan tool information
Command the liftgate latch to release by pressing the liftgate release switch. The liftgate latch should release the liftgate.
⇒ | 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. |
⇒ | 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 not within the specified range, replace the relay. |
• | 30 and 86 |
• | 30 and 87 |
• | 30 and 85 |
• | 85 and 87 |
⇒ | If less than the specified range, replace the Rear End Release relay. |
⇒ | If greater than the specified range, replace the Rear End Release relay. |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
• | Control Module References for BCM replacement, setup, and programming |