Workshop Manual

RESTRAINT CONTROL SYSTEM
9J1–6
Chart A SDM Integrity Check
D09R200001
Circuit Description:
When the SDM recognizes “ignition 1” voltage, applied to
terminals “12”, is greater than 9 volts, the “AIR BAG”
warning lamp is flashed 7 times to verify operation. At this
time the SDM performs “Turn–ON” tests followed by
“Continuous Monitoring” tests. When a malfunction is
detected, the SDM sets a current diagnostic trouble code
and illuminates the “AIR BAG” warning lamp. The SDM
will clear current diagnostic trouble codes and move them
to a history file when the malfunction is no longer detected
and/or the ignition switch is cycled, except for DTCs 51,
53 and 71. DTC 71 can only be cleared using a scan tool
“Clear Codes” command in case that the malfunction on
DTC 71 has been solved and no DTCs 51 and 53 were
remained. DTCs 51, 53 and 71 can not be cleared after a
“Clear Codes” command is issued.
Chart Test Description:
Number(s) below refer to step number(s) on the
diagnostic chart:
1. This test Confirm s a current malfunction. If no
current malfunction is occurring (history DTC set)
the “Diagnostic Aids” for the appropriate diagnostic
trouble code should be referenced. The SDM
should not be replaced for a history diagnostic
trouble code.
2. This test checks for a malfunction introduced into the
SRS during the diagnostic process. It is extremely
unlikely that a malfunctioning SDM would cause a
new malfunction to occur during the diagnostic
process.
3. When all circuitry outside the SDM has been found
to operate properly, as indicated by the appropriate
diagnostic chart, then and only then should the SDM
be replaced.