Service Manual Manual

SECTION 3 - CHASSIS & TURNTABLE
3-200 – JLG Lift – 3120788
DTC 1626- CAN J1939 Transmit (Tx) Fault
• Controller Area Network
• Check Condition- Key On, Engine Off and/or Running
• Fault Condition- ECM CAN transceiver transmit 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 broadcasts a number of packets (as
defined in the diagnostic calibration, must be set to less
than 125 failures) to the network that are not received.
Diagnostic Aids
• Verify that all CAN devices are powered and are prop-
erly grounded
• Verify that the 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