Service Manual Manual

SECTION 3 - CHASSIS & TURNTABLE
3121142 – JLG Lift – 3-179
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 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 is expecting to see network traffic and either
does not see traffic (as defined in the diagnostic calibration,
must be set to less than 125 failures).
Diagnostic Aids
• Verify that all CAN devices are powered and are properly
grounded
• Verify that 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
BLUE/RED or PINK
BLUE/WHITE