F 250 4WD Super Duty V8-6.4L DSL Turbo (2008)
R39
Test S: Intermittent No High Speed Controller Area Network (HS-CAN) Communication, One Or
More Modules Are Not Responding Durin
PINPOINT TEST S: INTERMITTENT NO HIGH SPEED CONTROLLER AREA NETWORK (HS-CAN) COMMUNICATION, ONE OR
MORE MODULES ARE NOT RESPONDING DURING NETWORK TEST
Normal Operation
An open in circuit VDB04 (WH/BU) (HS-CAN +) or VDB05 (WH) (HS-CAN -) may cause intermittent or unreliable communication to all modules
on the HS-CAN. The HS-CAN is used for communication between the following modules:
-
ABS module
-
Trailer brake control (TBC) module (if equipped)
-
PCM
-
Restraints control module (RCM)
-
Supplemental heater control module (diesel engine only, if equipped)
-
Transmission control module (TCM) (diesel engine only, if equipped)
-
Variable geometry turbocharger (VGT) actuator (diesel engine only)
-
Instrument cluster
In the event that either circuit VDB04 (WH/BU) or VDB05 (WH) becomes open to any module on the network, unreliable network communication to
all modules on the network may result.
This pinpoint test is intended to diagnose the following:
-
Wiring, terminals or connectors
S1
