Ford 2003 Mustang Workshop Manual page 4045

Pinpoint Test G: LFC 16/DTC B1925 — Passenger Air Bag Circuit Shorted to Battery or Ignition
Normal Operation
The restraints control module (RCM) checks for passenger air bag circuit shorts to battery or ignition
by monitoring the voltage of circuits 607 (LB/OG) and 616 (PK/BK) at pins 6 and 7. If the RCM detects
a short to battery or ignition on either of these pins, it will store a diagnostic trouble code (DTC) B1925
in memory and flash a lamp fault code (LFC) 16 (or higher priority code if one exists) on the air bag
indicator.
Possible Causes
A passenger air bag circuit short to battery or ignition can be caused by:
a short to battery or ignition on circuit 607 (LB/OG).
a short to battery or ignition on circuit 616 (PK/BK).
a short to battery or ignition on the passenger air bag module.
an RCM internal concern.
PINPOINT TEST G: LFC 16/DTC B1925 — PASSENGER AIR BAG
CIRCUIT SHORTED TO BATTERY OR IGNITION
G1 CHECK FOR A HARD OR INTERMITTENT DTC
Key in OFF position.
Connect the diagnostic tool. Scan Tool
Key in ON position.
Enter the following diagnostic mode on the diagnostic tool:
Retrieve/Clear Continuous DTCs.
Retrieve and record any continuous DTCs for use later in this
pinpoint test.
Enter the following diagnostic mode on the diagnostic tool: On-
Demand Self Test.
Was DTC B1925 retrieved during the on-demand self test?
Test Step
REACTIVATE the
system. PROVE
OUT the system.
REFER to Air Bag
Supplemental
Restraint System
(SRS) in this
section. CLEAR all
DTCs.
Result / Action to
Take
Yes
This is a hard fault.
The fault condition
is still present. This
fault cannot be
cleared until it is
corrected and the
DTC is no longer
retrieved during the
on-demand self
test. GO to G2 .
No
This is an
intermittent fault.
The fault condition
is not present at
this time. GO to
G5 .