RESTRAINT CONTROL SYSTEM
9J1–25
DTC 18 Passenger Deployment Loop Short To Ground
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 monitors the voltages at “Driver Bag Low"
terminal “4" and “Passenger Bag Low" terminal “16" to
detect short to ground in the air bag assembly circuits.
DTC Will Set When:
Neither of the two air bag assemblies is open.
“Ignition 1" is within the normal operating voltage range.
Once these conditions are met and the voltage at
“Passenger Bag Low" is below a specified value,
Diagnostic Trouble Code (DTC) 18 will set. This test is
run once each ignition cycle and “Continuous
Monitoring".
Action Taken:
SDM turns “ON" the “AIR BAG" warning lamp and sets
a diagnostic trouble code.
DTC Will Clear When:
This malfunction is no longer occurring and the ignition
switch is turned “OFF".
DTC Chart Test Description:
Number(s) below refer to circled number(s) on the
diagnostic chart:
2. This test determines whether the SDM is
malfunctioning.
3. This test isolates the malfunction to one side of the
passenger air bag assembly yellow 2–pin connector