2010 Cadillac CTS Sedan AWD V6-3.6L Page 545

2010 Cadillac CTS Sedan AWD V6-3.6L Page 545

Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the appropriate rear door ajar switch.

2. Ignition ON, verify the scan tool Right Rear Door Ajar Sw. or Left Rear Door Ajar Sw. parameter is Door Closed.

瀚慖f not the specified value, test the signal circuit terminal listed below for a short to ground:

* LR door latch switch terminal 4

* RR door latch switch terminal 1

瀚慖f the circuit tests normal, replace the BCM.

3. If all circuits test normal, test or replace the door ajar switch.

Component Testing

1. Ignition OFF, disconnect the harness connector at the appropriate door ajar switch.

2. Test for infinite resistance between the signal terminal and the ground terminal with the door ajar switch in the open position listed below:

* LR door latch switch terminal 4 and 6

* RR door latch switch terminal 1 and 3

瀚慖f not the specified value, replace the door ajar switch.

3. Test for less than 2 ohms between the signal terminal and the ground terminal with the door ajar switch in the closed position listed below:

* LR door latch switch terminal 4 and 6

* RR door latch switch terminal 1 and 3

瀚慖f greater than the specified range, replace the door ajar switch.

Repair Instructions

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

* Rear Side Door Latch Replacement (See: Body and Frame/Doors, Hood and Trunk/Doors/Rear Door/Rear Door Latch/Service and Repair)

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

B3006

DTC B3006

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 B3006 5A

- Hood Ajar Circuit Plausibility Failure

Diagnostic Fault Information

Circuit/System Description

The body control module (BCM) monitors the voltage input of the hood open switch signal circuit and the hood open closed switch signal circuit.

With the hood open, the hood ajar portion of the switch is closed, grounding the hood ajar switch signal circuit from the BCM, and the hood closed