Ford 2003 Mustang Workshop Manual page 4070

Pinpoint Test P: No Communication With The Restraints Control Module
Normal Operation
The RCM communicates with the scan tool using ISO 9141 communication mode through the data link
connector (DLC).
Possible Causes
A no communication condition can be caused by:
damage to circuit 70 (LB/WH).
a damaged DLC.
a damaged scan tool.
an RCM internal concern.
PINPOINT TEST P: NO COMMUNICATION WITH THE RESTRAINTS
CONTROL MODULE
P1 CHECK THE RCM CONNECTOR C2041 AND CONNECTOR PIN 5
FOR DAMAGE
WARNING: If the supplemental restraint system (SRS) is
being serviced, the system must be deactivated and restraint
system diagnostic tools must be installed. Refer to
Supplemental Restraint System (SRS)
The air bag restraint system diagnostic tools must be removed
and the air bag modules reconnected when the system is
Test Step
in this section.
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
system. PROVE
OUT the system.
REFER to
Supplemental
Restraint System
(SRS) in this
section. CLEAR all
DTCs.
Result / Action to
Take
Yes
GO to P2
Air Bag
No
REPAIR RCM
C2041 or RCM
C2041 pin 5 as
necessary.
Air Bag
.