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Home >> Suzuki >> 2006 >> Swift + >> Repair and Diagnosis >> Restraints >> Air Bag, SRS >> Supplemental Inflatable Restraint System - Troubleshooting >> SDM Integrity Check >> Circuit Description
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Circuit Description

When the SDM recognizes ignition voltage greater than 9 volts at the SDM, the air bag indicator flashes 7 times to verify operation. At this time the SDM performs turn-on tests followed by resistance measurement tests and continuous monitoring tests.

When malfunction is detected, the SDM sets a current DTC and illuminates the air bag indicator.

When the malfunction is no longer detected and/or the ignition switch is cycled, the SDM will clear current DTCs and move them to a history file, except for the DTCs 032, 033, 034, 035, 038, B1620, B1650, B1670 and sometimes 071. DTCs 032, 033, 034, 035, 038, B1620, B1650, B1670 will not be cleared by a scan tool because these codes require replacement of the SDM. The SDM must be replaced only after the malfunction that set the DTC has been repaired.

SDM Integrity Check

Step Action Yes No
CAUTION: Refer to SDM Voltage After Ignition Is Turned OFF Caution .
CAUTION: Refer to Sensing and Diagnostic Module Handling Caution .
Schematic Reference:  SIR Schematics (Except North American)  or  SIR Schematics (North American) Connector End View Reference:  SIR Connector End Views 
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 air bag indicator as the ignition is turned ON.
Does the indicator lamp flash 7 times?		 Go to Diagnostic System Check - Vehicle Go to Step 2 
2
  1. Turn the ignition to LOCK and remove the key.
  2. Connect the scan tool to the data link connector (DLC).
  3. Turn ON the ignition.
  4. Request the SIR DTC display with the scan tool.
Is the same DTC displayed that occurred when the Diagnostic System Check - Vehicle was previously performed?		 Go to Step 3  Go to Diagnostic Trouble Code (DTC) List - Vehicle
3
  1. Clear the SIR DTCs.
  2. Turn OFF the ignition for at least 30 seconds.
  3. Observe the air bag indicator as the ignition is turned ON.
Does the indicator lamp flash 7 times?		 System OK Go to Step 4 
4
  1. Turn the ignition to LOCK and remove the key.
  2. Disconnect the sensing and diagnostic module (SDM) connector.
  3. Replace the SDM. Refer to Inflatable Restraint Sensing and Diagnostic Module Replacement .
  4. Connect the SDM connector and ensure that all components are properly mounted.
Did you complete the action?		 Go to Diagnostic System Check - Vehicle -
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