For 1990-2009 cars

# Battery Draw From The BCM 2 Fuse - keywords BCM2 click crank door drain lock no slow start

Subject: | Battery Draw From The BCM 2 Fuse

Models: | 2005-2008 Chevrolet Cobalt

| 2006-2008 Chevrolet HHR

| 2007-2008 Pontiac G5

This PI was superseded to update model years. Please discard PIC4108D.

The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.

### Condition/Concern:

Reports coming into Technical Assistance Center indicate a condition for a battery draw on the above vehicles. The condition is a battery draw that can cause about 100-170 Millie amp draw on the battery. When this condition exists, you may notice that if the BCM 2 fuse in the BCM is pulled, the draw goes away. When looking at the wiring schematics you will NOT see the microprocessor (inside the BCM) that is hooked to this fuse. This Microprocessor is sending small amounts of voltage out on two circuits.

#### The two circuits are:

1. The door lock input circuit #682 (White) to the BCM could be pulled low. (DOC# 1692511) For HHR use (DOC# 1771933)
2. The dome lamp output circuit #149 (D-BU/WHT) to the BCM could be pulled low (DOC# 1583369) For HHR use (DOC # 1771926)

### Recommendation/Instructions:

Install the Tech-2/Candi module and look at the door lock switch status in the BCM data section. Status should be reading " Idle". If it reads Unlock or Lock, then check for a possible short to ground in circuit #682 (White) or a possible door lock switch concern. If that checks out OK then remove circuit #149 from the BCM and wait to see if your draw times out in 20 minutes. If it does then check for a STG in circuit #149 (D-BU/WHT).

Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.