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 B396B 01: Liftgate Motor Clutch Control Circuit Short to BatteryDTC B396B 02: Liftgate Motor Clutch Control Circuit Short to Ground
DTC B396B 04: Liftgate Motor Clutch Control Circuit Open
Diagnostic Fault Information
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
Liftgate Module B+ | 2 | B1019 00 | -- | -- |
Liftgate Position Sensor 5V Reference Voltage | 2 | B153E 08 | 2 | -- |
Full Open Signal | B153B 02 | 2 | 2 | -- |
Liftgate Disable Signal | 1, 2 | 1 | 1 | -- |
Liftgate Open Signal | 1 | 1 | 1 | -- |
Object Sensors Signal | -- | B153F 05 | B153F 05 | B153F 07 |
Open/Close Switches Signal | B2494 02 | 1, 2 | 1, 2 | -- |
Pawl Switch Signal | B153A 00 | B153A 08 | B153A 00 | -- |
Position Sensor Signal 1 | B153E 02 | B153E 05 B153A 08 | B153E 05 | -- |
Position Sensor Signal 2 | B153E 02 | B153E 05 B153A 08 | 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 04 | B2495 01 | -- |
Liftgate Latch Release Control | B2495 02 | B2495 04 | 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 | -- | B0153E 08 | 2 | -- |
I/P Switch Ground | -- | 1 | 1 | -- |
Liftgate Control Module Ground | -- | 2 | 2 | -- |
1. Liftgate Switch Malfunction 2. Liftgate Malfunction | ||||
Circuit/System Description
The liftgate module (LGM) supplies power and ground to the liftgate clutch, which is part of the liftgate motor assembly. Upon receiving a liftgate open request, the LGM supplies voltage to the clutch via the liftgate motor engage control circuit. The liftgate motor disengage control circuit serves a ground. With the clutch energized, the motor output is mechanically connected to the liftgate and power liftgate operation is allowed. The liftgate motor clutch engages or disengages the liftgate motor to the liftgate drive gear and is the component that determines power or manual operation.
Conditions for Running the DTC
System voltage to the LGM must be 9-16 volts.
Conditions for Setting the DTC
B396B 01
The LGM detects a short to voltage in the liftgate motor engage control circuit or the liftgate motor disengage control circuit.
B396B 02
The LGM detects a short to ground in the liftgate motor engage control circuit or the liftgate motor disengage control circuit.
B396B 04
The LGM detects an open/high resistance in the liftgate motor engage control circuit or the liftgate motor disengage control circuit.
Action Taken When the DTC Sets
| • | When an open or short to ground condition exists, power liftgate operation will be inoperative. |
| • | When a short to voltage condition exists, the liftgate can not be opened or closed manually. |
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. |
Diagnostic Aids
Important: Before testing can be performed the liftgate must be opened. Refer to Opening the Liftgate Without Electrical Power for the appropriate procedure.
Whenever the LGM loses power or is disconnected, the ignition must be cycled OFF then ON in order to reactivate the LGM.
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, doors unlocked, transaxle in Park, enable the power liftgate by pressing the liftgate enable/disable button on the I/P switch assembly.
- Open the liftgate by pressing the touchpad on the liftgate handle switch and close by pressing the liftgate button switch. The liftgate should release, power open, power close, cinch-in and latch.
Circuit/System Testing
- Ignition OFF, disconnect the harness connector X3 at the LGM.
- Ignition OFF, test for less than 1.0 ohm of resistance between the control terminal 4 and ground.
- Ignition OFF, test for less than 1.0 ohm of resistance between the control terminal 3 and ground.
- Connect a test lamp between control terminal 4 and control terminal 3.
- Ignition ON, command the power liftgate to OPEN and CLOSE with a scan tool. The test lamp should illuminate when changing between the commanded states.
- If all circuits test normal, replace the liftgate motor assembly.
| ⇒ | If greater than the specified range, replace the LGM. |
| ⇒ | If greater than the specified range, replace the LGM. |
| ⇒ | If the test lamp remains OFF during either of the commands, replace the LGM. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
| • | Control Module References for LGM replacement, setup and programming |
