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Sensing and Diagnostic Module (SDM) Integrity Check: Troubleshooting

WARNING: The sensing and diagnostic module (SDM) can maintain sufficient voltage to deploy the airbags and pretensioners for 1 minute after the ignition is OFF and the fuse has been removed. If the airbags and pretensioners are not disconnected, do not begin service until one minute has passed after disconnecting the power to the SDM. Otherwise, injury could result.
WARNING: During service procedure, be very careful when handling the SDM. Never strike or jar the SDM. Never power the supplemental inflatable restraints (SIR) when the SDM is not rigidly attached to the vehicle. All SDM mounting bolts must be carefully tightened, and the arrow on the SDM must be point toward the front of the vehicle to ensure proper operation of the SIR. The SDM could be activated if it is powered when it is not rigidly attached to the vehicle, resulting in unexpected deployment and possible injury.
SENSING AND DIAGNOSTIC MODULE (SDM) INTEGRITY - TROUBLESHOOTING

Step Action Value(s) Yes No
1
  1. Turn the ignition to LOCK and remove the key
  2. Connect all SIR components and ensure that all the components are properly mounted.
  3. Ensure that the ignition switch has been OFF for at least 30 seconds.
  4. Observe the airbag indicator as the ignition is turned on.

Does the indicator lamp flashes seven times?		 - Clear the SIR DTCs and go to "SIR DIAGNOSTIC SYSTEM CHECK ". Go to Step 2.
2
  1. Turn the ignition to LOCK and remove the key.
  2. Connect the scan tool to DLC. Follow the directions given in the scan tool manual.
  3. Turn the ignition to ON.
  4. Request SIR DTC display with the scan tool.

Is the same DTC displayed that was previous occurred when the SIR Diagnostic System Check was previously performed?		 - Go to Step 3. Go to the table for the DTC indicated
3
  1. Clear SIR DTCs.
  2. Turn the ignition OFF for at least 30 seconds.
  3. Observe the airbag indicator as the ignition is turned on.

Does the indicator lamp flashes seven times?		 - The system is OK Go to Step 4.
4
  1. Turn the ignition to LOCK and remove the key.
  2. Disconnect the SDM connector.
  3. Replace the SDM.
  4. Connect the SDM connector and ensure that all components are properly mounted.

Is the repair complete?		 - Go to "SIR DIAGNOSTIC SYSTEM CHECK ". -
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