Circuit/System Testing
1. Ignition OFF, disconnect the X2 harness connector at the LGM.
2. Test for less than 1 ohm between the ground circuit terminal 6 and ground.
锟斤拷 If greater than the specified range, test the ground circuit for an open/high resistance.
3. Ignition ON, verify that a test lamp illuminates between the B+ circuit terminal 3 and ground.
锟斤拷 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, replace the LGM.
4. Ignition OFF, connect the X2 harness connector and disconnect the X3 harness connector at the LGM.
5. Test for less than 15 ohms between the control terminal 1 at the LGM and ground.
锟斤拷 If greater than the specified range, replace the LGM.
6. Test for less than 15 ohms between the control terminal 2 at the LGM and ground.
锟斤拷 If greater than the specified range, replace the LGM
7. Install a 15A fused jumper wire between the control circuit terminal 1 at the liftgate motor assembly and 12 volts. Momentarily install a
jumper wire between the control circuit terminal 2 at the liftgate motor assembly and ground. The liftgate motor should perform the OPEN or
CLOSE function.
锟斤拷 If the function does not perform as specified, replace the liftgate motor assembly.
8. Install a 15A fused jumper wire between the control circuit terminal 2 and 12 volts. Momentarily install a jumper wire between the control
circuit terminal 1 and ground. The liftgate motor should perform the CLOSE or OPEN function.
锟斤拷 If the function does not perform as specified, replace the liftgate motor assembly.
9. If all circuits test normal, replace the LGM.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
* Liftgate Close Actuator Motor Replacement (See: Body and Frame/Doors, Hood and Trunk/Trunk / Liftgate/Trunk / Liftgate Motor/Service
and Repair/Liftgate Close Actuator Motor Replacement)
* Control Module References (See: Testing and Inspection/Programming and Relearning) for LGM replacement, setup, and programming
B396B
DTC B396B
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System
Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an
overview of the diagnostic approach.
* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure
Instructions)provides an overview of each diagnostic category.
DTC Descriptors
DTC B396B 01
- Liftgate Motor Clutch Control Circuit Short to Battery
DTC B396B 02
- Liftgate Motor Clutch Control Circuit Short to Ground
DTC B396B 04
- Liftgate Motor Clutch Control Circuit Open
Diagnostic Fault Information
