Focus L4-2.0L DOHC VIN 3 (2002)
Information Bus: Testing and Inspection
Module Communications Network
Initial Inspection
1. Verify the customer concern.
2. Visually inspect the following for obvious signs of electrical damage.
VISUAL INSPECTION CHART
Electrical
-
Fuse(s)
-
Wiring harness
-
Loose or corroded connector(s)
3. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.
4. If the cause is not visually evident, connect the diagnostic tool to the data link connector 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.
^
Check the connections to the vehicle.
^
Check the ignition switch position.
5. If the diagnostic tool still does not communicate with the vehicle, refer to the diagnostic tool operating manual.
6. Carry out the DATA LINK DIAGNOSTICS test.
If the diagnostic tool responds with:
^
CKT914, CKT915 or CKT70 = ECUS NO RESP/NOT EQUIP, refer to the Symptom Chart. See: Diagnosis By Symptom
^
CKT914 = ALL ECUS NO RESP/NOT EQUIP, GO to Pinpoint Test G. See: Pinpoint Tests/Test G: No Module/Network Communication -
ISO 9141 Network
^
CKT915 = ALL ECUS NO RESP/NOT EQUIP, GO to Pinpoint Test G. See: Pinpoint Tests/Test G: No Module/Network Communication -
ISO 9141 Network
^
If CKT70 = ALL ECUS NO RESP/NOT EQUIP, GO to Pinpoint Test F. See: Pinpoint Tests/Test F: Oil Pressure/Temp. Cluster No
Diagnostic Tool Response
^
NO RESPONSE/NOT EQUIPPED, refer to the Symptom Chart. See: Diagnosis By Symptom
^
NO RESPONSE ON CKT914 ( BUS+) or NO RESPONSE ON CKT915 (BUS-), refer to the Symptom Chart. See: Diagnosis By Symptom
^
SYSTEM PASSED, refer to the Symptom Chart for the module in question. See: Diagnosis By Symptom
7. If still no response from the diagnostic tool, GO to Pinpoint Test I. See: Pinpoint Tests/Test I: No Module/Network Communication
Test A: ABS Control Module Does Not Respond to the Scan Tool
A1
