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: Interior Trunk/Hatch/Liftglass Release Sw CircuitDiagnostic Fault Information
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
Liftgate Control Module B+ | 2 | 2 | -- | -- |
Liftgate Position Sensor 5V Reference Voltage | 2 | 2 | 2 | -- |
Full Open Signal | B153B 02 | 2 | 2 | -- |
Liftgate Disable Signal | 1, 2 | 1 | 1 | -- |
Liftgate Open Signal | B2730 | 1 | 1 | -- |
Object Sensors Signal | B153F 03 | 2 | B153F 07 | -- |
Open/Close Switches Signal | B2494 02 | 1, 2 | 1, 2 | -- |
Pawl Switch Signal | B153A 00 | B153A 00 | B153A 00 | -- |
Position Sensor Signal 1 | B153E 02 | B153E 05 | B153E 05 | -- |
Position Sensor Signal 2 | B153E 02 | B153E 05 | B153E 05 | -- |
Ratchet Switch Signal | B153A 00 | B153A 00 | B153A 00 | -- |
Sector Switch Signal | B153A 00 | B153A 00 | B153A 00 | -- |
Disengage Clutch Control | B396B 02 | B396B 04 | B396B 01 | -- |
Engage Clutch Control | B396B 02 | B396B 04 | B396B 01 | -- |
Liftgate Latch Cinch Control | B2495 02 | B2495 05 | B2495 01 | -- |
Liftgate Latch Release Control | B2495 02 | B2495 05 | B2495 01 | -- |
Liftgate Motor Close Control | B396A 02 | B396A 04 | B396A 01 | -- |
Liftgate Motor Open Control | B396A 02 | B396A 04 | B396A 01 | -- |
Full Open Low Reference | -- | 2 | 2 | -- |
Liftgate Switches Low Reference | -- | 1 | 1 | -- |
Position Sensor Low Reference | -- | 2 | 2 | -- |
I/P Switch Ground | -- | 1 | 1 | -- |
Liftgate Control Module Ground | -- | 2 | 2 | -- |
1. Liftgate Switch Malfunction 2. Liftgate Malfunction | ||||
Circuit/System Description
Pressing the I/P switch assembly closes a contact providing a ground for the Liftgate Open circuit. The power liftgate module (PLGM) will detect the voltage drop and command the liftgate to open or close depending upon the position of the liftgate.
Conditions for Running the DTC
Battery voltage must be between 9-16 volts.
Conditions for Setting the DTC
This DTC will set when the LGM detects a fault in the Liftgate Open circuit.
Action Taken When the DTC Sets
| • | The BCM stores the DTC to memory. |
| • | The lift switch will be inoperative. |
Conditions for Clearing the DTC
| • | This DTC will change from current to history when the fault is no longer present. |
| • | A history DTC will clear after 100 consecutive ignition cycles if the condition for the malfunction is no longer present. |
| • | The technician issues a scan tool CLEAR DTCs command. |
Reference Information
Schematic Reference
Connector End View Reference
Vehicle Access Connector End Views
Description and Operation
Rear Hatch/Gate Description and Operation
Electrical Information Reference
Scan Tool Reference
Circuit/System Verification
Ignition ON, observe the Int Trunk/Liftglass Sw parameter while pressing the I/P Switch Assembly. The reading should change between Active and Inactive.
Circuit/System Testing
- Ignition OFF, disconnect the harness connector at the I/P Switch.
- Ignition ON, verify the scan tool Int Trunk/Liftglass Sw is Inactive.
- Install a 3A fused jumper wire between the signal circuit terminal 7 and ground. Verify the scan tool Int Trunk/Liftglass Sw is Active.
- If all circuits test normal, test or replace the I/P Switch.
| ⇒ | If not the specified value, test the signal circuit terminal 7 for a short to ground. If the circuit tests normal, replace the PLGM. |
| ⇒ | 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 PLGM. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
Control Module References for BCM replacement, setup, and programming
