JLG 450A_AJ Series II Service Manual - Manual (Page 255)

SECTION 3 - CHASSIS & TURNTABLE
3121180 – JLG Lift – 3-205
DTC 1627- CAN J1939 Receive (Rx) Fault
• Controller Area Network.
• Check Condition- Key On, Engine Off and/or Running.
• Fault Condition- ECM CAN transceiver receive error
counts greater than the limit defined in the diagnostic
calibration (must be < 125 failures).
• Corrective Action(s)- Illuminate MIL, sound audible
warning or illuminate secondary warning lamp.
• Non-emissions related fault.
The Controller Area Network (CAN) is a serial communica-
tion network used to transmit and receive data between
intelligent devices. Systems that utilize CAN communica-
tion include smart actuators, smart sensors, dash panels
and gauges, and other microcomputers. Each smart sen-
sor, actuator, or controller incorporates a CAN transceiver
that interprets logic level signals on the network and trans-
lates the information into digital data.
This fault will set if CAN communication is enabled and the
ECM transceiver is expecting to see network traffic and
either does not see traffic (as defined in the diagnostic cal-
ibration, must be set to less than 125 failures).
Diagnostic Aids
• Verify all CAN devices are powered and are properly
grounded
• Verify CAN network is properly terminated
• Check CAN wire routing with respect to noise sources
(ignition coils, spark plug coil wires, etc.) and shield if
necessary
• Check CAN (+) and (-) wires for short circuits