Ford 2003 Mustang Workshop Manual page 3844

Mechanical
Binding latches
4. If the concern remains after the inspection, connect the scan tool to the data link connector
(DLC) located beneath the instrument panel and select the vehicle to be tested from the scan
tool menu. If the scan tool does not communicate with the vehicle:
check that the program card is correctly installed.
check the connections to the vehicle.
check the ignition switch position.
5. If the scan tool still does not communicate with the vehicle, refer to the scan tool manual.
6. Carry out the DATA LINK DIAGNOSTIC TEST. If the scan tool responds with:
CKT914, CKT915 or CKT70 = ALL ECUS NO RESP/NOT EQUIP, refer to
00 .
NO RESP/NOT EQUIP for GEM, go to Pinpoint Test A.
SYSTEM PASSED, retrieve and record the continuous diagnostic trouble codes (DTCs),
erase the continuous DTCs, and carry out the self-test diagnostics for the GEM.
7. If the DTCs retrieved are related to the concern, go to the GEM Diagnostic Trouble Code (DTC)
Index to continue diagnostics.
8. If no DTCs related to the concern are retrieved, proceed to Symptom Chart to continue
diagnostics.
GEM Diagnostic Trouble Code (DTC) Index
DTC Description
B1217 Horn Relay Coil Circuit Failure
B1218 Horn Relay Coil Circuit Short to
Vbatt
B1312 Lamp Headlamp Input Circuit
Short to Battery
B1317 Battery Voltage High
B1318 Battery Voltage Low
B1322 Driver Door Ajar Circuit Short to
Ground
B1330 Passenger Door Ajar Circuit
Short to Ground
B1334 Decklid Ajar Rear Door Circuit
Electrical
CJB Fuses:
39 (5A)
19 (15A)
25 (25A)
BJB Fuse POWER WINDOWS (40A)
Damaged wiring harness
Loose or corroded connector(s)
Circuitry open/shorted
Damaged relays
Remote transmitter
Remote transmitter batteries
Source
GEM
GEM
GEM
GEM
GEM
GEM
GEM
GEM
Action
GO to Pinpoint Test E
GO to Pinpoint Test E
REFER to Section 417-01
REFER to Section 414-00
REFER to Section 414-00
REFER to Section 417-02
REFER to Section 417-02
REFER to Section 417-02
Section 418-
.
.
.
.
.
.
.
.