JLG 510AJ Service Manual - Manual (Page 189)

SECTION 3 - CHASSIS AND TURNTABLE
3121181 – JLG Lift – 3-147
DTC 1629- J1939 TSC1 Message Reciept Loss
• Controller Area Network
• Check Condition- Key On, Engine Running
• Fault Condition- ECM is expecting to receive J1939 TSC1
messages and has not received a message for more than n
seconds (as defined in the diagnostic calibration).
• Corrective Action(s)- Illuminate MIL, sound audible warn-
ing or illuminate secondary warning lamp. Govern engine
speed at a forced idle.
• Non-emissions related fault
J1939 TSC1 may be used to send a commanded (or desired)
engine speed to the ECM. If configured, the ECM will govern
the engine speed to this commanded speed if possible. When
operating in this mode, the ECM expects to receive TSC1 mes-
sages on a regular interval. When this message is not received,
the ECM must operate the engine at a default idle speed until
commanded to do otherwise.
This fault will set if CAN communication is enabled, the engine
is running, and no TSC1 messages are received over the CAN
bus for more than n seconds (as determined by the diagnostic
calibration).
Diagnostic Aids
• Verify that that the CAN device generating the TSC1 mes-
sage is powered and 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