Explorer 4WD V8-4.6L (2008)
data (-) circuits are each regulated to approximately 2.5 volts during neutral or rested network traffic. As bus messages are sent on the data (+) circuit,
voltage is increased by approximately 1.0 volt. Inversely, the data (-) circuit is reduced by approximately 1.0 volt when a bus message is sent.
Multiple bus messages can be sent over the network CAN circuits allowing multiple modules to communicate with each other. The HS-CAN will not
communicate while certain faults are present, but will operate with diminished performance with other faults present. The HS-CAN bus may remain
operational when 1 of the 2 termination resistors are not present.
The HS-CAN operates at a maximum data transfer speed of 500 Kbps and is designed for real time information transfer and control. The network will
remain operational, but at a degraded level, when certain circuit faults are present.
The following modules are on the HS-CAN:
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Instrument cluster (IC)
-
PCM
-
ABS module
-
Restraints control module (RCM)
-
Occupant classification system module (OCSM)
-
Transmission control module (TCM) (if equipped)
-
4X4 control module (if equipped)
The following fault chart describes the specific HS-CAN failures and their resulting symptom:
HS-CAN Communication Fault Chart
The following chart describes the specific CAN messages broadcast by each module, and the module(s) that receive the message: