2010 Cadillac CTS Sedan AWD V6-3.6L Page 612

2010 Cadillac CTS Sedan AWD V6-3.6L Page 612

7. Ignition OFF, disconnect the X7 harness connector at the BCM.

8. Ignition ON, test for less than 1 volt between the following signal circuit terminals and ground:

* Terminal 12

* Terminal 15

瀚慖f greater than the specified range, test the signal circuit for a short to ground.

9. Test for infinite resistance between the following signal circuit terminals and ground:

* Terminal 12

* Terminal 15

瀚慖f less than the specified value, test the signal circuit for a short to ground.

10. Test for less than 2 ohms of resistance between the following signal circuit terminals:

* Terminal 12 at the BCM and terminal B at the intrusion sensor

* Terminal 15 at the BCM and terminal C at the intrusion sensor

瀚慖f greater than the specified range, test the signal circuit for an open/high resistance.

11. If all circuits test normal, test or replace the intrusion sensor. If the DTC resets, 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

B3819

DTC B3819, B3820, B3822, or B3823

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 B3819 00

- Left Rear Window Up Control Circuit

DTC B3820 00

- Left Rear Window Down Control Circuit

DTC B3822 00

- Right Rear Window Up Control Circuit

DTC B3823 00

- Right Rear Window Down Control Circuit

Diagnostic Fault Information