Ford 2003 Mustang Workshop Manual page 4036

Is the voltage greater than 10 volts?
C4 CHECK THE RCM PROGRAMMED VEHICLE ID
Enter the following diagnostic mode on the diagnostic tool: PID/Data
Monitor and Record.
Select PID VID No. 1, VID No. 2, and VID No. 3.
Was vehicle ID No. 1 and vehicle ID No. 2 no connect and vehicle
ID No. 3 ignition?
C5 CHECK FOR AN INTERMITTENT FAULT
Refer to the continuous DTCs recorded during Step C1.
Was the continuous DTC retrieved during Step C1 an intermittent
fault or were you directed to this step from Step C4?
C6 CHECK FOR ADDITIONAL DTCs
Refer to continuous DTCs recorded during Step C1.
Were any continuous DTCs retrieved during Step C1?
Yes
GO to C5 .
No
INSTALL a new
RCM. GO to C6 .
Yes
CHECK for
causes of an
intermittent open
on circuit 611
(WH/OG). Attempt
to recreate the
hard fault by
flexing the wire
harness and
cycling the ignition
key frequently.
REPAIR any
intermittent
concerns found.
GO to C6 .
No
GO to C6 .
Yes
Do not clear any
DTCs until all
DTCs have been
resolved. GO to
the Restraints
Control Module
(RCM) Diagnostic
Trouble Code
(DTC) Priority
Table in this
section for
pinpoint test
direction.
No
RECONNECT the
system.
REACTIVATE the