3. Electric System
3-13
3.2.1
Emergency controller
(1) List of CN1 terminal functions (12 pins)
Pin No. Line
color
Connection Function
CN1-1
－
NIL
CN1-2
－
NIL
CN1-3 B/W Residual pressure start prohibition
lamp
When more residual pressure than 14.6psi
(0.1MPa)[1bar] is left in the receiver tank, Ry3
relay of emergency controller becomes “ON” and
alarm lamp goes on.
CN1-4 R/W DPF controller CN19-6 terminal
Power supply (DC12V)
CN1-5 B/R Engine controller (ECU) CN5-32
terminal
When Ry4 relay of emergency controller is “ON”,
it sends abnormality signal to ECU to stop
engine.
CN1-6 B Grounding
CN1-7 L/W
･
Solenoid valve SV1 for starting
unloader / purge
･
Solenoid valve SV2 for aftercooler
drain (Option)
･
When starter switch is ON at start-up, and
emergency controller CN1-12 terminal voltage
is electrified, starting unloader solenoid valve
(SV1) and aftercooler drain solenoid (SV2) is
OFF till the following time by coolant
temperature.
･
When purge switch is turned ON, SV1 functions
continuously and it is operated at engine speed
of approximately 1,400 min
-1
.
The time when SV1 and SV2 are OFF
●
Coolant temperature: Lower than 50°F(10
℃
):
120 seconds or the time till coolant
temperature rises higher than 50°F(10
℃
)
●
Coolant temperature: Higher than 50°F(10
℃
):
For 30 seconds
CN1-8
－
NIL
CN1-9 B Grounding
CN1-10 R/L Starter switch C terminal
･
Inputting start signal.
･
When more residual pressure than 14.6psi
(0.1MPa)[1bar] is left in the receiver tank, Ry5
relay of emergency controller is made OFF and
start is locked.
CN1-11 W Engine controller (ECU) CN5-35
terminal
Inputting start signal to ECU
CN1-12 R/W Starter switch Acc terminal
Power supply (DC12V)
(2) List of CN2 terminal functions (20 pins)
Pin No. Line
color
Connection Function
CN2-1 B
Common of oil pressure switch,
engine air filter, compressor air
filter
Grounding
CN2-2 Br/R DPF controller CN19-8 terminal
When regeneration lamp lights continuously,
purge solenoid valve (SV1) is made to work for
forced purge operation.
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