2010 Cadillac CTS Sedan AWD V6-3.6L Page 217

2010 Cadillac CTS Sedan AWD V6-3.6L Page 217

7. Ignition ON, test for 8.0 - 10.0 volts between the signal circuit terminal 18 and ground.

瀚慖f less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace

the windshield outside moisture sensor.

瀚慖f greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the windshield outside

moisture sensor.

8. If all circuits test normal, replace the BCM.

Repair Instructions

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

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

* Windshield Outside Moisture Sensor Replacement (See: Sensors and Switches/Sensors and Switches - Wiper and Washer Systems/Rain

Sensor/Service and Repair)

B396A

DTC B396A

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 B396A 01

- Liftgate Motor Control Circuit Short to Battery

DTC B396A 02

- Liftgate Motor Control Circuit Short to Ground

DTC B396A 04

- Liftgate Motor Control Circuit Open

Diagnostic Fault Information

Circuit/System Description

The liftgate motor is a bi-directional motor and open or close operation is the result of the direction of the motor rotation. The liftgate control

module controls the liftgate motor through the control circuits by supplying power and ground in the appropriate polarity. The motor control

circuits are monitored by the liftgate control module prior to activation for a high or low condition and during motor operation for any irregular

current flow conditions.

Conditions for Running the DTC

* The system voltage is 9-16 volts.

* Power open or close function is initiated.

Conditions for Setting the DTC

B396A 01

The liftgate module detects a short to voltage in a liftgate motor control circuit.