F 250 4WD Super Duty V10-6.8L VIN S (2001)
Multifunction Electronic Control Modules: Initial Inspection and Diagnostic Overview
1. Verify the customer concern by operating the system.
2. Visually inspect for obvious signs of electrical damage.
VISUAL INSPECTION CHART
Electrical
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Central Junction Box (CJB) fuse:
-
8 (5 A)
- 15 (5 A)
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Wiring harness
^
Connector(s)
^
Circuitry
3. If the concern remains after the inspection, connect the diagnostic tool to the Data Link Connector (DLC) located beneath the instrument panel
and select the vehicle to be tested from the diagnostic tool menu. If the diagnostic tool does not communicate with the vehicle:
^
check that the program card is correctly installed.
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check the connections to the vehicle.
^
check the ignition switch position.
4. If the diagnostic tool still does not communicate with the vehicle, refer to the diagnostic tool manual.
5. Carry out the DATA LINK DIAGNOSTICS test. See: Powertrain Management/Computers and Control Systems/Multiplex Communication
Network/Testing and Inspection/Module Communications Network/Pinpoint Tests/Pinpoint Test PC (Precheck)
If the diagnostic tool responds with:
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CKT914, CKT915 or CKT7O = ALL ECUS NO RESP/NOT EQUIP, refer to Module Communications Network (Information Bus)
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NO RESPONSE/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.
6. If the DTCs retrieved are related to the concern, go to the Diagnostic Trouble Code (DTC) Index to continue diagnostics. See: Diagnostic Trouble
Code Tests and Associated Procedures
7. If no DTCs related to the concern are retrieved, refer to the appropriate Vehicle/Systems to continue diagnostics.
