9J1–34
RESTRAINT CONTROL SYSTEM
DTC 22 Driver Deployment Loop Resistance Low
D09RX002
Circuit Description:
When the ignition switch is turned “ON", the Sensing
and Diagnostic Module (SDM) will perform tests to
diagnose critical malfunctions within itself. Upon
passing these tests “ignition 1", and deployment loop
voltages are measured to ensure they are within their
respective normal voltage ranges. The SDM then
proceeds with the “Resistance Measurement Test"
“Driver Bag Low" terminal “4" is grounded through a
current sink and the driver current source connected to
“Driver Bag High" terminal “3" allows a known amount
of current to flow. By monitoring the voltage difference
between “Driver Bag High" and “Driver Bag Low" the
SDM calculates the combined resistance of the driver
air bag assembly, Supplemental Restraint System
(SRS) coil assembly, harness wiring Circuits(CKTs)
IB05–YELLOW and IB06–YELLOW/BLACK and
connector terminal contact.
DTC Will Set When:
The combined resistance of the driver air bag assembly,
SRS coil assembly, harness wiring CKTs IB05–
YELLOW and IB06–YELLOW/BLACK and connector
terminal contact is above a specified value. This test is
run once each ignition cycle during the “Resistance
Measurement Test" when:
1. No “higher priority faults" are detected during “Turn–
ON"
2. “Ignition 1" voltage is in the specified value.
Action Taken:
SDM turns “ON" the “AIR BAG" warning lamp and sets
DTC 22.
DTC Will Clear When:
The ignition switch is turned “OFF."
SECTION