Sakai SW880-1, Руководство по ремонту

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11-107
TROUBLESHOOTING
2-5-5. Auto speed function does not work 2/9
Parking brake switch must be released.
Foot brake switch must be ON (Brake pedal is not depressed).
Set speed change switch to “
”.
(Automatic speed function is disabled when speed change switch is “ ”.)
Check that speed can be changed by speed change switch between operation speed (“ ”) and traveling
speed (“ ”).
Set throttle switch to “FULL”.
(Automatic speed function is disabled when throttle switch is in any other position than “FULL”.)
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
E21 1. Connector Check vibration frequency select switch, vibration change
switch and traveling controller connector terminal 31, 32,
33 for corrosion, breakage, bending and looseness.
If any abnormality is found, connector is faulty.
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Replace connector
or terminal.
2. Harness (1) Measure resistances between switches and traveling
controller terminal wires.
Vibration frequency select switch terminal 3 wire G and
traveling controller terminal 31 wire G
Vibration frequency select switch terminal 6 wire L and
traveling controller terminal 32 wire L
Vibration change switch terminal 2 wire Br and traveling
controller terminal 33 wire Br
Standard resistance : 10 Ω or less
(2) Measure resistances between switches and fuse box
terminal wires.
Vibration frequency select switch terminal 1, 4 wires
YW and fuse box terminal 8 wire YW
Vibration change switch terminal 1 wire Yw and fuse
box terminal 8 wire YW
Standard resistance : 10 Ω or less
If resistance is abnormal, harness is faulty.
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Repair or replace
harness.
3. Vibration
Frequency
Select Switch
(1) when starter switch is ON, measure voltage between
vibration frequency select switch terminal 1, 4 inlet
wires YW and chassis ground.
Standard voltage : 12 V or more
(2) when starter switch is ON and vibration frequency
select switch is “2500”, measure voltage between
vibration frequency select switch terminal 6 outlet wire L
and chassis ground.
Standard voltage : 12 V or more
(3) when starter switch is ON and vibration frequency
select switch is “3000”, measure voltage between
vibration frequency select switch terminal wires and
chassis ground.
Vibration frequency select switch terminal 3 outlet wire
G and chassis ground.
Vibration frequency select switch terminal 6 outlet wire
L and chassis ground.
Standard voltage : 12 V or more
(4) when starter switch is ON and vibration frequency
select switch is “4000”, measure voltage between
vibration frequency select switch terminal 3 outlet wire
G and chassis ground.
Standard voltage : 12 V or more
If above item (1) is OK and item (2), (3) or (4) is NG,
vibration frequency select switch is faulty.
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Replace vibration
frequency select
switch.
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