Ford 2003 Mustang Workshop Manual page 4033

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B2 INSPECT THE RCM MOUNTING, MOUNTING BRACKET
AND MOUNTING SURFACE
Remove the RCM. Refer to
(RCM) in the Removal and Installation portion of this
section.
Visually inspect the RCM, mounting bracket and mounting
surface for damage, corrosion or dirt.
Inspect the RCM mounting and make sure that the
retaining bolts are fully seated and tightened correctly.
Refer to Restraints Control Module (RCM)
and Installation portion of this section for correct tightening
torque.
Was a significant amount of corrosion or dirt found,
the RCM mounting bracket attached to the mounting
surface incorrectly or were the three RCM retaining
bolts not fully seated and tightened correctly?
B3 CHECK THE RCM HARNESS CONNECTION
Check the RCM harness connection.
Is the RCM harness connector connected to the RCM
correctly?
B4 CHECK THE VEHICLE CHASSIS GROUND
Measure the resistance between a known good chassis
ground and the mounting surface of the RCM.
Is the resistance greater than 100 ohms?
B5 CHECK THE GROUND CIRCUIT 397 (BK/WH) FOR AN
OPEN
Key in OFF position.
Disconnect: RCM C2041.
Measure the resistance between RCM C2041 pin 21,
circuit 397 (BK/WH), harness side and a sheet metal
ground near the RCM.
Is the resistance greater than 100 ohms?
B6 CHECK FOR AN INTERMITTENT FAULT
Refer to the continuous DTCs recorded during Step B1.
Restraints Control Module
in the Removal
This is an intermittent fault.
The fault condition is not
present at this time. GO to
B6 .
Yes
Make sure the RCM,
mounting bracket and
mounting surface are free of
damage, corrosion or dirt and
the three retaining bolts are
fully seated and correctly
tightened. Reattach the RCM
and mounting bracket to the
mounting surface. GO to
No
GO to B3 .
Yes
GO to B4 .
No
ATTACH the RCM harness
connector correctly. GO to
B7 .
Yes
REPAIR the chassis
grounding system. GO to
No
GO to B5 .
Yes
REPAIR the circuit. GO to
B7 .
No
INSTALL a new RCM. GO to
B7 .
Yes
B7 .
B7 .