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 Descriptor
DTC B2730 00: Interior Trunk/Liftglass/Hatch Release Switch CircuitDiagnostic Fault Information
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
Rear End Release Relay B+ | 1 | 1 | -- | -- |
Trunk Release Switch Signal | B2730 00 | 2 | 2 | -- |
Rear Compartment Lid Latch Control | 1 | 1 | 1 | -- |
Rear End 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 | ||||
Circuit/System Description
When the ignition is ON, the body control module (BCM) supplies a signal to the rear compartment lid release switch through the trunk release switch signal circuit. When the rear compartment lid release switch is pressed, the voltage within the signal circuit is pulled low and in response, the BCM applies ground to the trunk release relay control circuit, which energizes the coil side of the trunk relay. The switch side of the trunk relay then closes, supplying battery positive voltage through the relay and the latch motor voltage control circuit to the rear compartment lid latch. The rear compartment lid latch, then releases the rear compartment lid so that it may be manually raised to an open position.
Conditions for Running the DTC
The system voltage is 9-16 volts.
Conditions for Setting the DTC
| • | The BCM detects a short to ground in the trunk release switch signal circuit for greater than 10 minutes. |
| • | The rear compartment lid release switch is closed for greater than 10 minutes. |
Action Taken When the DTC Sets
The rear compartment lid release switch will be inoperative.
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 become a history DTC. |
| • | A history DTC will clear after 50 ignition cycles |
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, observe the scan tool Trunk Switch parameter while pressing the rear compartment lid release switch button. The parameter should change between Active and Inactive.
Circuit/System Testing
- Ignition OFF, disconnect the harness connector at the rear compartment lid release switch.
- Test for less than 1 Ω between the ground circuit terminal 5 and ground.
- Ignition ON, verify the scan tool Trunk Switch parameter is Inactive.
- Install a 3A fused jumper wire between the signal circuit terminal 13 and the ground circuit terminal 5. Verify the scan tool Trunk Switch parameter is Active.
- If all circuits test normal, test or replace the rear compartment lid release switch.
| ⇒ | If greater than the specified range, test the ground circuit for an open/high resistance. |
| ⇒ | If not the specified value, test the signal circuit terminal 13 for a short to ground. If the circuit tests normal, replace the BCM. |
| ⇒ | If not the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the BCM. |
Component Testing
- Ignition OFF, disconnect the harness connector at the rear compartment lid release switch.
- Test for infinite resistance between the signal terminal A and the ground terminal B with the switch in the open position.
- Test for less than 2 Ω of between the signal terminal A and the ground terminal B with the switch in the closed position.
- Test for infinite resistance between each terminal and the rear compartment lid release switch housing/case.
| ⇒ | If not the specified value, replace the rear compartment lid release switch |
| ⇒ | If greater than the specified range, replace the rear compartment lid release switch. |
| ⇒ | If not the specified value, replace the rear compartment lid release switch. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
Control Module References for BCM replacement, setup and programming
