Ford 2003 Mustang Workshop Manual page 3495

Visual Inspection Chart
Mechanical
Switch(es)
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 self-test diagnostics for the GEM.
7. If the DTCs retrieved are related to the concern, go to 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
GEM Diagnostic Trouble Code (DTC) Index
DTC Description
B1322 Driver Door Ajar Circuit
Short to Ground
B1330 Passenger Door Ajar Circuit
Short to Ground
B1334 Decklid Ajar Rear Door
Circuit Short to Ground
B1342 ECU Is Defective
B1397 Power Door unlock Circuit
Short to Battery
B1405 Driver Power Window Down
Circuit Short to Battery
Electrical
CJB Fuses:
7 (20A)
32 (15A)
39 (5A)
Wiring harness
Connections
Lamps
Circuitry
Source
GEM
GEM
GEM
GEM CLEAR the DTC. Retrieve the DTCs. If DTC B1342 is
GEM
GEM
Action
REFER to Section 417-02
REFER to Section 417-02
REFER to Section 417-02
retrieved, INSTALL a new GEM. For additional
information, REFER to
REFER to Section 501-14B
REFER to Section 501-11
Section 418-
.
.
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Section 419-10 .
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