Mariner 2WD L4-2.5L (2009)
ISO 9141 Network Communication Fault Chart
Medium Speed Controller Area Network (MS-CAN)
The MS-CAN uses an unshielded twisted pair cable of data (+) and data (-) circuits. The data (+) and the 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 CAN
circuits allowing multiple modules to communicate with each other. The MS-CAN is used for the Instrument Cluster (IC), the Front Controls Interface
Module (FCIM), the Front Display Interface Module (FDIM), HVAC module, the Audio Control Module (ACM), the APIM, the Satellite Digital Audio
Receiver System (SDARS) module and the Smart Junction Box (SJB) communications, and is designed for general information transfer. The MS-CAN
will not communicate while certain faults are present, but will operate with diminished performance with other faults present. The MS-CAN bus may
remain operational when 1 of the 2 termination resistors are not present.
The MS-CAN operates at a maximum data transfer speed of 125 Kbps for bus messages and is designed for general information transfer. The network
will remain operational, but at a degraded level when certain circuit faults are present.
The following fault chart describes the specific MS-CAN failures and their resulting symptom:
MS-CAN Communication Fault Chart
High Speed Controller Area Network (HS-CAN)
The HS-CAN uses an unshielded twisted pair cable of data (+) and data (-) circuits. The data (+) and the 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 CAN
circuits allowing multiple modules to communicate with each other. The HS-CAN is a high speed communication network used for the Instrument
Cluster (IC), the PCM, the ABS module, the APIM, the Occupant Classification System Module (OCSM), Restraints Control Module (RCM), the
Battery Control Module (BCM), the Transmission Control Module (TCM), the Power Steering Control Module (PSCM) and the 4X4 control module
communications, and designed for real time information transfer and control. 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 fault chart describes the specific HS-CAN failures and their resulting symptom: