Ford 2003 Mustang Workshop Manual page 3525

The generic electronic module (GEM) is on the ISO 9141 network. The GEM module controls a variety
of systems including one touch down windows, wipers, perimeter anti-theft, and warning chimes. For
additional information, refer to
The anti-lock brake control module communicates over the ISO 9141 communication network when
not equipped with traction control and communicates over the SCP communication network when it is
equipped with the traction control option. The anti-lock brake control module controls the brake
pressure to the four wheels to keep the vehicle under control while braking. For additional information
on anti-lock brake control module without traction control, refer to
information on anti-lock brake control module with traction control, refer to
The instrument cluster is on the SCP communication network. The instrument cluster displays driver
information. The instrument cluster incorporates the PATS control module functions. For additional
information on the PATS system, refer to
cluster, refer to Section 413-01
Inspection and Verification
1. Verify the customer concern.
2. Visually inspect for obvious signs of electrical damage.
Visual Inspection Chart
Central junction box (CJB) Fuse 31 (5A)
Damaged wiring harness
Loose or corroded connections
Anti-lock brake control module without traction control (optional)
Anti-lock brake control module with traction control (optional)
Generic electronic module (GEM)
Restraint control module (RCM)
Powertrain control module (PCM)
Instrument cluster
3. If the concern remains after the inspection, connect diagnostic tool to the data link connector
(DLC) located beneath the instrument panel and select the vehicle to be tested from diagnostic
tool menu. If diagnostic tool does not communicate with the vehicle:
check that the program card is correctly installed.
check that the correct version of the program card is installed.
check the connections to the vehicle.
check the ignition switch position.
If the diagnostic tool still does not communicate with the vehicle, go to Pinpoint Test H.
4. Go to Pinpoint Test PC.
System Precheck
Section 419-10 .
Section 419-01
.
Electrical
Section 206-09A
Section 206-09B
. For additional information on the instrument
. For additional
.