Air Bag System - Proper Diagnosis and Service
Information IB05-11-S003Proper Air Bag System Diagnosis and Service
ISSUE DATE: MARCH 2005
Affected Vehicles
2003-2004 Isuzu Ascender (US/UT).
Service Information
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 subsection 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.
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