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
