13 TROUBLESHOOTING
en-106
No Glowplug operation Ensure Diesel Genset is selected. Check
MCU LED #17 should be on.
Check engine harness connections.
Check MCU LED #6 should be on when
glowplugs should be on (i.e. Pre-glow,
during cranking, and post-glow)
If not on check to see if circuit breaker 6 is
tripped.
Overcurrent protection device in MCU
tripped. Check for open connection or
shorted wire to GND for Glow Plug relay coil
power.
No 12V power to MCU. Overcurrent protec-
tion device in PDU may be tripped. Check
for open connection or shorted wire to GND
for MCU 12V power.
Cycle power once corrected.
Fault Code on LDU Review any fault codes and take appropriate
action.
No CAN communication. Check connections.
Engine cranks but won't
start (Diesel)
Ensure Diesel Genset is selected. Check
MCU LED #17 should be on.
Check harness connections.
Check for Fuel Solenoid power. Check MCU
LED #2 should be on.
If not on check to see if CB 6 is tripped
Fault Code on LDU Review any fault codes and take appropriate
action.
Check to see if Fuel Solenoid Pulls and
Holds. Check MCU LED'S #4 for Pull on for
0.5 sec then #5 on for Hold.
Overcurrent protection device in MCU
tripped. Check for open connection or
shorted wire to GND for Pull and Hold sole-
noids power.
No 12V power to MCU. Overcurrent protec-
tion device in PDU may be tripped. Check
for open connection or shorted wire to GND
for MCU 12V power.
Cycle power once corrected.
Engine cranks but won't
start (Gas)
Ensure Gas Genset is selected. Check MCU
LED #18 should be on.
Check engine harness connection.
No Traction Movement Ensure Machine was started. Check LDU
Green Lightning Bolt for steady on.
If flashing initiate start sequence.
Fault Code on LDU Review any fault codes and take appropriate
action.
Traction Contactor is off. Check MCU LED #
8 should be on when contactor is on. If off
see next item.
Overcurrent protection device in MCU
tripped. Check for open connection or
shorted wire to battery for traction contactor
power.
Check if Seat Switch is functioning. Check
MCU LED #24 should be on when on seat
and off when off seat.
Check switch and harness connection.
No CAN communication. Check connections.
Automatic Parking Brake not releasing Manually release parking brake, then
remove release screws. Cycle power.
Overcurrent protection device in PDU
tripped. Check for open connection or
shorted wire to GND for throttle pedal power,
TCU logic power, and park brake power.
Cycle power once corrected.
Overcurrent protection device in MCU
tripped. Check for open connection or
shorted wire to battery for traction contactor
coil power.
To Next Page
Loading...
Need help?
General
