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+ | B396A 02, B153A 08 | B396A 02, B153A 08 | -- | -- |
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 02 | B153F 05 | B153F 05 | B153F 03, B153F 07 |
Open/Close Switches Signal | B2494 02 | 1, 2 | 1, 2 | -- |
Pawl Switch Signal | B153A 00 | B153A 00 | B153A 00 | B153A 08 |
Position Sensor Signal 1 | B153E 02 | B153E 05, B153E 08 | B153E 05 | -- |
Position Sensor Signal 2 | B153E 02 | B153E 05, B153E 08 | B153E 05 | -- |
Ratchet Switch Signal | B153A 00 | B153A 00 | B153A 00 | B153A 08 |
Sector Switch Signal | B153A 00 | B153A 00 | B153A 00 | B153A 08 |
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 motor clutch engages or disengages the liftgate motor to the liftgate drive gear and is the component that determines power or manual operation. When the liftgate control module supplies power to the clutch control circuit, the clutch coil is energized and the liftgate motor is engaged to the liftgate drive gear so that power operation can occur. The liftgate control module monitors the clutch control circuit at all times for a short high while in an inactive state or a short low or insufficient current flow while in an active state.
Conditions for Running the DTC
System voltage to the liftgate control module must be 9-16 volts.
Conditions for Setting the DTC
B396B 01
The LGM detects a short to voltage in the liftgate clutch engage control circuit or the liftgate clutch disengage control circuit.
B396B 02
The LGM detects a short to ground in the liftgate clutch engage control circuit or the liftgate clutch disengage control circuit.
B396B 04
The LGM detects an open/high resistance in the liftgate clutch engage control circuit or the liftgate clutch disengage control circuit.
Action Taken When the DTC Sets
| • | When an open or short low condition exists, power liftgate operation will be inoperative. |
| • | When a short high 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. |
| • | A history DTC will clear after 50 ignition cycles |
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. The liftgate should release and power open.
- Close the liftgate by pressing the liftgate button switch. The liftgate should power close, cinch-in, and latch.
Circuit/System Testing
- Ignition OFF, disconnect the C3 harness connector at the LGM.
- Test for less than 15 ohms between the control terminal 4 at the LGM and ground.
- Test for less than 15 ohms between the control terminal 3 at the LGM and ground.
- Test for 9-10 ohms between the control circuit terminal 3 and control circuit terminal 4 at the liftgate motor assembly.
- 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 less than the specified range, test either control circuit for a short to ground. If the circuits test normal, replace the liftgate motor assembly. |
| ⇒ | If greater than the specified range, test either control circuit for a short to voltage or an open/high resistance. If the circuits test normal, replace the liftgate motor assembly. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
| • | Control Module References for liftgate control module replacement, programming and setup |
