JLG 450A_AJ Series II Service Manual - Manual (Page 200)

SECTION 3 - CHASSIS & TURNTABLE
3-160 – JLG Lift – 3121290
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 cali-
bration (must be < 125 failures).
• Corrective Action(s)- Illuminate MIL, sound audible warn-
ing or illuminate secondary warning lamp.
• Non-emissions related fault.
The Controller Area Network (CAN) is a serial communication
network used to transmit and receive data between intelligent
devices. Systems that utilize CAN communication include
smart actuators, smart sensors, dash panels and gauges, and
other microcomputers. Each smart sensor, actuator, or control-
ler incorporates a CAN transceiver that interprets logic level
signals on the network and translates the information into dig-
ital 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 fail-
ures) to the network that are not received.
Diagnostic Aids
• Verify all CAN devices are powered and are properly
grounded
• Verify the CAN network is properly terminated
• Check CAN wire routing with respect to noise sources (igni-
tion coils, spark plug coil wires, etc.) and shield if necessary
• Check CAN (+) and (-) wires for short circuits