Electrical - No Crank/No Start, Battery Discharged
TECHNICALBulletin No.: 11-06-03-002
Date: September 20, 2011
Subject: No Crank/No Start, Battery Discharged (Inspect Door Latches)
Models:
2010-2011 Buick Enclave
2010-2011 Chevrolet Traverse
2010-2011 GMC Acadia
All Built Prior to December 1, 2010
Condition
Important
Check with the customer to determine if there has been an intermittent Door Ajar message in the DIC.
Some customers may comment on a No Crank/No Start condition caused by a discharged battery.
Cause
This discharged battery condition can be caused by door latch assemblies that are providing an incorrect signal to the body control module (BCM). Door latch integrated circuits may generate a door open signal to the BCM when the door is closed, resulting in the vehicle staying awake and discharging the battery.
Correction
Use the following steps to determine if a door latch issue is causing the No Crank/No Start condition.
1. Charge the battery. Refer to Battery Charging in SI.
2. After charging, test the battery. Refer to Battery Inspection/Test in SI.
3. With the battery charged and tested, perform the following steps.
- Close all four doors, the hood and the liftgate.
- With the parking brake set, start the vehicle, and with the brakes applied, place the gear selector in Drive.
- Observe the driver information center (DIC).
4. If a Driver Door Open, Passenger Door Open, Right Rear Door Open or Left Rear Door Open message appears in the DIC, proceed to step # 5. If no Door Ajar message appears in the DIC, proceed to the Latch Resistance Diagnosis section below.
5. Replace the affected door latch assembly with a revised latch. Refer to the Parts Information in this bulletin. Refer to Front Side Door Latch Replacement or Rear Side Door Latch Replacement in SI for replacement procedures.
Latch Resistance Diagnosis (For vehicles without RPO AXC/AXE)
Use the following steps to determine the value being sent to the BCM from the front and rear door latches. The resistance measurement can be taken from the Pink BCM connector relative to a known good ground. The value should be 50 Mega Ohms or greater when the door latch is closed. If the value is less than 50 Mega Ohms with the latch in the closed position, replace the latch with a revised latch. Refer to the Parts Information in this bulletin.
Body Control Module (BCM) X6 Connector View
- Pin #8 Right Front Door Ajar Switch Signal
- Pin #10 Left front Door Ajar Switch Signal
- Pin #14 Right Rear Door Ajar Switch Signal
- Pin #15 Left Rear Door Ajar Switch Signal
Latch Resistance Diagnosis (For vehicles with RPO AXC/AXE)
Use the following steps to determine the value being sent to the BCM from the rear door latches. The resistance measurement can be taken from the Pink BCM connector relative to a known good ground. The value should be 50 Mega Ohms or greater when the door latch is closed. If the value is less than 50 Mega Ohms with the latch in the closed position, replace the latch with a revised latch. Refer to the Parts Information in this bulletin.
Body Control Module (BCM) X6 Connector View
- Pin #14 Right Rear Door Ajar Switch Signal
- Pin #15 Left Rear Door Ajar Switch Signal
Use the following steps to determine the value being sent to the BCM from the front door latches. The resistance measurement can be taken between pin # 5 and pin #13 on the door trim panel harness connector. The value should be 50 Mega Ohms or greater when the door latch is closed. If the value is less than 50 Mega Ohms with the latch in the closed position, replace the latch with a revised latch. Refer to the Parts Information in this bulletin.
Door Lock/Window Switch Passenger X2 (AXE) Connector
View
- Pin #5 Low Reference
- Pin #13 Right Front Door Ajar Switch Signal
Door Lock/Window Switch Driver X2 (AXE) Connector View
- Pin #5 Low Reference
- Pin #13 Left Front Door Ajar Switch Signal
Parts Information
Warranty Information
For Vehicles repaired under warranty, use the table.
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