For 1990-2009 cars

# Info - Proper Air Bag System Diagnosis and Service

Subject: | Proper Air Bag System Diagnosis and Service

Models: | 2004 and Prior Passenger Cars and Light Duty Trucks

| Excluding 2004 Pontiac Grand Prix

This bulletin is being revised to remove 2004 Pontiac Grand Prix for the models. Please discard Corporate Bulletin Number 03-09-41-003 (Section 9 -- Restraints).

This bulletin is being issued to emphasize several aspects of proper diagnosis and servicing of the Air Bag System.

#### Air Bag Readiness Light

As stated in Owners Manuals, if the air bag readiness light stays on after the vehicle is started, the system may not be working properly. The air bags may not inflate in a crash or may even inflate without a crash. If the Air Bag Readiness Light/Indicator is illuminated or comes on intermittently, diagnose to determine the cause. Refer to Air Bag Indicator Circuit Malfunction in the SIR sub-section of the appropriate Service Manual.

#### Replacement of Soaked SDMs

As stated in Service Manuals, if the vehicle interior is exposed to moisture and becomes soaked up to the level of the sensing and diagnostic module (SDM), the SDM and SDM harness connector must be replaced. The SDM could be activated when powered, which could cause air bag deployment and result in personal injury. The air bags, as well as the sensors and related parts, would have to be replaced. To help avoid this situation, turn the ignition off immediately. DO NOT turn the ignition back on, even to tow the vehicle, unless the battery cable is first disconnected.

#### Replacement of SDM that Shows Signs of Water Exposure or Corrosion

If an SDM that is being replaced shows signs of water exposure or corrosion and the customer does not know the source of the water exposure, then the vehicle should be checked for water leaks. If leaks are found, the customer should be advised to have them repaired to help avoid damage to the replacement SDM.