Ford 2003 Mustang Workshop Manual page 3854

Did the passenger door lock and unlock?
B18 CHECK CIRCUITS 163 (RD/OG), 1015 (RD/WH), 117 (PK/BK),
AND 118 (PK/OG) FOR OPEN
Disconnect: GEM C201c.
Measure the resistance between passenger door lock actuator
C603 Pin 2, Circuit 1015 (RD/WH), harness side and GEM C201c
Pin 10, Circuit 117 (PK/BK), harness side; and between passenger
door lock actuator C603 Pin 1, Circuit 163 (RD/OG), harness side,
and GEM C201c Pin 8, Circuit 118 (PK/OG), harness side.
Are the resistances less than 5 ohms?
PINPOINT TEST C: THE DOORS DO NOT LOCK/UNLOCK USING
THE REMOTE TRANSMITTER
Test Step
C1 CHECK THE LOCK OPERATION USING
THE DRIVER DOOR LOCK SWITCH
Lock and unlock the doors using the
driver door lock switch.
Do all the doors lock and unlock
correctly?
C2 CHECK IGNITION STATES
Connect the diagnostic tool.
Monitor the GEM PIDS IGN_KEY, IGN_A,
IGN_S, and IGN_R while cycling the
ignition switch through the OFF, ACC,
RUN, START and key out positions.
Do the PID values agree with the
ignition switch positions?
C3 CHECK THE GEM FUNCTION TEST
TIC/DATA
NOTE: This PID may not be supported in
Result / Action to Take
Yes
GO to C2 .
No
GO to Pinpoint Test B .
Yes
GO to C3 .
No
For key-in-ignition concerns, REFER to
Section 413-09 .
Yes
Yes
INSTALL a new
GEM. For additional
information, REFER
to Section 419-10 .
REPEAT the self-
test. CLEAR the
DTCs.
No
REPAIR the circuit in
question. REPEAT
the self-test. CLEAR
the DTCs.