K Tahoe 4WD V8-4.8L VIN V (2000)
Malfunction Lamp / Indicator: Testing and Inspection
Schematic
CIRCUIT DESCRIPTION
The AIR BAG warning lamp is controlled by the inflatable restraint Sensing and Diagnostic Module (SDM) via Class 2 serial data. When the ignition
switch is first turned to the RUN position, the SDM performs tests to diagnose critical malfunctions within itself. The SDM then commands the AIR
BAG warning lamp OFF after it has flashed seven times.
DIAGNOSTIC AIDS
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If Ignition 1 voltage is outside of the normal operating voltage range (9-16 Volts), the AIR BAG warning lamp will come ON solid with no DTC's
set.
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The loss of serial data communication between the inflatable restraint sensing and diagnostic module (SDM) and the Instrument Panel Cluster
(IPC), will cause the AIR BAG warning lamp to come ON solid. Refer to DTC U1001 - U1254 Loss of XXX Communications in Data Link
Communications.
TEST DESCRIPTION
