F 150 4WD V8-4.6L VIN 8 (2010)
side.
-
Is the resistance less than 5 ohms?
Yes
REPAIR the circuits. CONNECT the negative battery cable. CLEAR the DTCs. REPEAT the network test with the scan tool.
No
CONNECT the negative battery cable. GO to Y40.
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Y21-Y40
Communications Network
Pinpoint Tests
Pinpoint Test Y: No High Speed Controller Area Network (HS-CAN) Communication, All Modules Are Not Responding
Refer to Wiring Diagram Set 14, Module Communications Network for schematic and connector information. See: Diagrams/Electrical
Diagrams/Diagrams By Number
Normal Operation
The High Speed Controller Area Network (HS-CAN) uses an unshielded twisted pair cable, circuits VDB04 (WH/BU) and VDB05 (WH).
This pinpoint test is intended to diagnose the following:
-
Wiring, terminals or connectors
-
4X4 control module
-
ABS module
-
Accessory Protocol Interface Module (APIM)
-
Instrument Cluster (IC)
-
Occupant Classification System Module (OCSM)
-
PCM
-
Restraints Control Module (RCM)
-
Transmission Control Module (TCM)
-
Trailer Brake Control (TBC) module
-
Telematics module
PINPOINT TEST Y: NO HS-CAN COMMUNICATION, ALL MODULES ARE NOT RESPONDING
NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the
connector.
NOTE: Most faults are due to connector and/or wiring concerns. Carry out a thorough inspection and verification before proceeding with the pinpoint
test. See: Initial Inspection and Diagnostic Overview/Module Configuration/Inspection and Verification
NOTE: Failure to disconnect the battery when instructed will result in false resistance readings. Refer to Battery.
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Y21 CHECK THE HS-CAN (+) AND HS-CAN (-) CIRCUITS FOR A SHORT TO GROUND WITH THE PCM DISCONNECTED
