2010 Cadillac CTS Sedan AWD V6-3.6L Page 223

2010 Cadillac CTS Sedan AWD V6-3.6L Page 223

1. Doors UNLOCKED, transaxle in P (park), command the liftgate OPEN by pressing the liftgate handle switch. The liftgate should release and

power OPEN.

2. Command the liftgate CLOSE by pressing the liftgate button switch. The liftgate should power CLOSE, cinch-in, and latch.

Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the S45B liftgate control switch - interior.

2. Ignition ON, verify that the scan tool Liftgate Rear Close Switch parameter is Inactive.

瀚慖f not the specified value, test the signal circuit terminal 3 for a short to ground. If the circuit tests normal, replace the LGM.

3. If all circuits test normal, test or replace the S45B liftgate control switch - interior.

Component Testing

Liftgate Close Switch Assembly

1. Ignition OFF, disconnect the harness connector at the S45B liftgate control switch - interior.

2. Test for infinite resistance between the signal terminal 3 and the ground terminal 4 with the switch in the inactive position.

瀚慖f not the specified value, replace the S45B liftgate control switch - interior

3. Test for less than 3 ohm between the signal terminal 3 and the ground terminal 4 with the switch in the active position.

瀚慖f greater than the specified range, replace the S45B liftgate control switch - interior.

Repair Instructions

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

Control Module References (See: Testing and Inspection/Programming and Relearning) for LGM replacement, setup and programming

B0408

DTC B0248, B0268, B0408, B0413, B0418, B0423, B3761, or B3773

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 the diagnostic category.

DTC Descriptors

DTC B0248 61

- Air Flow Control 3 Circuit Actuator Stuck

DTC B0268 61

- Air Flow Control 7 Circuit Actuator Stuck

DTC B0408 61

- Temperature Control 1 Circuit Actuator Stuck

DTC B0413 06

- Temperature Control 1 Feedback Circuit Short to Ground or Open

DTC B0418 61

- Temperature Control 2 Circuit Actuator Stuck

DTC B0423 06

- Temperature Control 2 Feedback Circuit Short to Ground or Open

DTC B3761 06

- Air Flow Control 3 Feedback Circuit Short to Ground or Open