2010 Cadillac CTS Sedan AWD V6-3.6L Page 186

2010 Cadillac CTS Sedan AWD V6-3.6L Page 186

瀚慖f not the specified value, test the signal circuit terminal 5 for a short to ground. If the circuit tests normal, replace the LGM.

6. Verify the scan tool LGM Latch Ratchet Sw. parameter is Inactive.

瀚慖f not the specified value, test the signal circuit terminal 6 for a short to ground. If the circuit tests normal, replace the LGM.

7. Verify the scan tool LGM Latch Sector Sw. parameter is Inactive.

瀚慖f not the specified value, test the signal circuit terminal 4 for a short to ground. If the circuit tests normal, replace the LGM.

8. Install a 3A fused jumper wire between the signal circuit terminal 5 and low reference circuit terminal 2. Verify the scan tool LGM Latch

Pawl Sw. parameter is Active.

瀚慖f not the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the

LGM.

9. Install a 3A fused jumper wire between the signal circuit terminal 6 and low reference circuit terminal 2. Verify the scan tool LGM Latch

Ratchet Sw. parameter is Active.

瀚慖f not the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the

LGM.

10. Install a 3A fused jumper wire between the signal circuit terminal 4 and low reference circuit terminal 2. Verify the scan tool LGM Latch

Sector Sw. parameter is Active.

瀚慖f not the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the

LGM.

11. If all circuits test normal, test or replace the liftgate latch assembly.

Repair Instructions

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

* Liftgate Latch Replacement (See: Body and Frame/Doors, Hood and Trunk/Trunk / Liftgate/Trunk / Liftgate Latch/Service and

Repair/Liftgate Latch Replacement)

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

B153F

DTC B153F

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 B153F 02

- Liftgate Position Sensor Signal Circuit Short to Ground

DTC B153F 05

- Liftgate Position Sensor Signal Circuit Short to Battery or Open

Diagnostic Fault Information

Circuit/System Description