Sakai SW880-1, Shop Manual

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11-065
TROUBLESHOOTING
2-5. Propulsion
Check following items before troubleshooting.
No blown fuses and power is applied up to fuses.
when measuring voltage and current without disconnecting connectors, refer to “Measuring voltage and current
flowing using tester” (P.11-006 to P.11-008).
Check any ground circuit which belongs to components to be checked.
2-5-1. Machine and engine suddenly stops 1/11
Parking brake switch must be released.
Foot brake switch must be ON (Brake pedal is not depressed).
Check whether exact meter multiple display shows any error code.
1) when display shows any error code
Reference Fig.: 2-5-1
Error code Check point Check/Cause Action
E01 or E02 1. Connector Check F-R lever potentiometer 1, 2 connector and
traveling controller connector terminal 8, 9, 47, 48,
working controller (C2) connector terminal 1, 2 for
corrosion, breakage, bending and looseness.
If any abnormality is found, connector is faulty.
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•
Replace connector
or terminal.
2. Harness Measure resistances between F-R lever potentiometer
and traveling controller terminal wires.
F-R lever potentiometer 1 terminal wire R and traveling
controller terminal 8 wire R
F-R lever potentiometer 1 terminal wire W and traveling
controller terminal 47 wire w, working controller (C2)
terminal 1 wire W
F-R lever potentiometer 1 terminal wire B and traveling
controller terminal 9 wire B
F-R lever potentiometer 2 terminal wire R and traveling
controller terminal 8 wire R
F-R lever potentiometer 2 terminal wire WR and
traveling controller terminal 48 wire WR, working
controller (C2) terminal 2 wire wR
F-R lever potentiometer 2 terminal wire B and traveling
controller terminal 9 wire B
Standard resistance : 10 Ω or less
If resistance is abnormal, harness is faulty.
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Repair or replace
harness.
3. F-R Lever
Potentiometer 1
(1) when starter switch is ON, measure voltage between
F-R lever potentiometer 1 terminal inlet wire R and
ground terminal 1 wire B.
Standard voltage : 5
± 0.5
V
(2) when starter switch is ON, measure voltage between
F-R lever potentiometer 1 terminal outlet wire W and
ground terminal 1 wire B.
①
When F-R lever is “N”
Standard voltage : 2.5
± 0.015
V
②
When F-R lever is “F”
Standard voltage : 1.2
± 0.02
V
③
When F-R lever is “R”
Standard voltage : 3.8
± 0.02
V
If above item (1) is OK and any of measurements in item
(2) is NG, F-R lever potentiometer 1 adjustment is faulty.
•
Adjust F-R lever
potentiometer 1 or
replace it even if
measurement is out
of standard after
adjustment.
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