Info - Unnecessary Replacement of SDM due to Water Exposure

When servicing a vehicle for water intrusion and the sensing and diagnostic module (SDM) has been exposed to water, DO NOT replace the SDM unless the SIR light stays on or it shows signs of corrosion. The SDM is a sealed unit. SDMs returned for warranty have been found to be no trouble found.

Important: If the SIR light stays on, diagnose the system according to service information prior to replacing the SDM.