2010 Cadillac CTS Sedan AWD V6-3.6L Page 219

2010 Cadillac CTS Sedan AWD V6-3.6L Page 219

瀚慖f greater than the specified range, test the control circuit for a short to voltage or an open/high resistance. If the circuit tests normal,

replace the K39 liftgate module.

Note: Verify that the interior liftgate control switch is in the Garage Mode or the Full Open Mode

6. Connect a test lamp between the control circuit terminal A and control circuit terminal B.

7. Ignition ON, with the liftgate in the open position, command the liftgate to CLOSE by pressing the B70 liftgate close switch. The test lamp

should illuminate during the CLOSE command.

瀚慖f the test lamp does not illuminate, test control circuit terminal A for a short to ground. If the circuit tests normal, replace the K39 liftgate

module.

8. With the liftgate in the closed position, command the liftgate to OPEN by pressing the S46 liftgate handle switch. The test lamp should

illuminate during the OPEN command.

瀚慖f the test lamp does not illuminate, test control circuit terminal B for a short to ground. If the circuit tests normal, replace the K39 liftgate

module.

9. If all circuits test normal, test or replace the M17 liftgate motor assembly.

Component Testing

Liftgate Motor

1. Ignition OFF, disconnect the harness connector at the M17 liftgate motor assembly.

2. Install a 30 A fused jumper wire between one of the control terminals and 12 V. Momentarily install a jumper wire between the other control

terminal and ground. Reverse the jumper wires at least two times, the M17 liftgate motor assembly should perform the OPEN and CLOSE

functions.

瀚慖f it does not perform as specified, replace the M17 liftgate motor assembly.

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the repair..

* Liftgate Hydraulic Pump Replacement (See: Body and Frame/Doors, Hood and Trunk/Trunk / Liftgate/Trunk / Liftgate Hydraulic

Pump/Service and Repair/Liftgate Hydraulic Pump Replacement)

* Control Module References (See: Testing and Inspection/Programming and Relearning) for liftgate module replacement, setup and

programming

B396C

DTC B396C

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 Descriptor

DTC B396C 08

- Power Liftgate Mode Switch Out of Range Signal Invalid

Diagnostic Fault Information