Jacobsen Eclipse 322, Руководство по ремонту

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ELECTRICAL
4222983 Second Edition 4-93
4
2. Sit in the seat and observe the digit at position (1).
Does the zero change to a one when the key
switch is move to the start position?
YES Key switch is good. Proceed to next step.
NO The key switch is faulty. Check connections
at switch and/or bench test switch and
replace as needed.
3. Toggle the LCD to the CAN Bus Status Screen.
Figure 4-76
4. Observe the MCU status (2). A flashing display
indicates the controller is not communicating.
Is the MCU communicating with the CAN
system?
YES MCU communication is good. Proceed to the
next step.
NO MCU communication is faulty. Check CAN
line connections.
Figure 4-77
5. Place the key switch in the on position and observe
the +12 volt power in LED (3).
Is the +12 volt power in LED illuminated?
YES The +12 volt power input is good. Proceed to
the next step.
NO Check 12 volt start battery, cables, and
connections. Repair or replace as needed.
6. Place the key switch in the off position. Open the
MCU access panel, place the key switch in the on
position and observe the fuel hold solenoid output
LED (2).
Does the fuel hold solenoid output LED
illuminate?
YES MCU fuel hold solenoid output is good.
Proceed to the next step.
NO MCU is faulty. Replace as needed.
7. Place the key switch in the start position and observe
the start relay output LED (1).
Does the start relay output LED illuminate while
the key switch is in the start position?
YES MCU start relay output is good. Proceed to
the next step.
NO MCU is faulty. Replace as needed.
8. With the key switch in the run position, measure
voltage at the fuel solenoid.
Does the multimeter display 12VDC?
YES The MCU to fuel solenoid harness and
connections are good. Test the fuel shutoff
solenoid, replace as needed.
NO The MCU to fuel solenoid harness is faulty.
Test wire harness and connections.
9. With the key switch in the start position, measure
voltage at the starter solenoid.
Does the multimeter display 12VDC?
YES The starter solenoid harness is good. Test
stater solenoid, replace as necessary.
NO Check PDU to starter solenoid harness. If
harness tests good, the start relay is faulty.
Replace the PDU.
CAN MCU RCU
OLM TCU SCU
TN2764
2
SPARE 12V DGTL LO IN
GENSET STATUS
PROGRAM SELECT 4
INPUTS
OUTPUTS
+48VDC POWER IN
+12VDC FUEL SOL PWR IN
+12VDC POWER IN
FUEL PULL SOLENOID
FUEL HOLD SOLENOID/
ANTI-FIRE SOLENOID
GLOW PLUG RELAY
START RELAY
TRACTION CONTACTOR
HEAD LIGHT
TCU FAN OUTPUT
SPARE OUTPUT 2
SILENT MODE OUTPUT
13
14
15
1
2
3
4
5
6
7
8
9
10
11
12
TN2833
1
2
3