9-049
TROUBLESHOOTING
2-5-2. Machine speed cannot be changed 5/5
Engine check lamp must not be lighting. If engine check lamp lights, refer to “Service information” of engine
manufacturer.
Check whether ECO controller red LED shows any blink.
2) when red LED shows any blink.
Reference Fig.: 2-5-1
Number of
red LED blinks
Check point
Check/Cause
Action
1 long,
6 short
1. Connector
Check motor rotation sensor (front) connector and
T/C controller (terminal C1-P8, C1-P9 and C2-P1) for
corrosion, breakage, bending and looseness.
If any abnormality is found, connector is faulty.
•
•
Replace connector or
terminal.
2. Harness
Measure resistances between motor rotation sensor
(front) and T/C controller terminal wires.
Motor rotation sensor (front) terminal POwER wire Lg
and T/C controller terminal C1-P8 wire Lg.
Motor rotation sensor (front) terminal PULSE wire GB
and T/C controller terminal C2-P1 wire GB.
Motor rotation sensor (front) terminal GROUND wire L
and T/C controller terminal C1-P9 wire L.
Standard resistance : 10 Ω or less
If resistance is abnormal, harness is faulty.
•
•
•
•
•
Repair or replace
harness.
3. Motor
Rotation
Sensor
(Front)
(1) when starter switch is ON, measure voltage between
motor rotation sensor (front) terminal POwER inlet wire
Lg and chassis ground.
Standard voltage : 5.0
± 0.25
V
(2) Check that motor rotation sensor (front) terminal
GROUND wire L is grounded.
(3) Start engine and rotate drum. Measure pulse between
motor rotation sensor (front) terminal PULSE outlet wire
GB and chassis ground.
Standard pulse : 71 pulses/rotation
If above items (1) and (2) are OK and item (3) is NG,
motor rotation sensor
(front)
is faulty.
•
Replace front motor
rotation sensor.
1 long,
7 short
1. Connector
Check engine ECM (terminal 33) and T/C controller
(terminal C1-P12) for corrosion, breakage, bending and
looseness.
If any abnormality is found, connector is faulty.
•
•
Replace connector or
terminal.
2. Harness
Measure resistances between engine ECM terminal 33
wire Yw and T/C controller terminal C1-P12 wire Yw.
Standard resistance : 10 Ω or less
If resistance is abnormal, harness is faulty.
•
•
Repair or replace
harness.
3. T/C
controller
After starting engine and throttle switch is “IDLE”,
measure pulse between T/C controller terminal C1-P12
engine rotation speed pulse inlet wire YW and chassis
ground.
Standard pulse : 2 pulses/rotation
If pulses are normal, but machine speed does not change,
T/C controller is faulty.
•
•
Replace T/C controller.
•
•
Содержание SV540 Series
Страница 1: ...SV540 SHOP MANUAL 3498 6418A 0 ...
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Страница 13: ...SAFETY ...
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Страница 23: ...SPECIFICATIONS ...
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Страница 43: ...ENGINE AND CONTROLS ...
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Страница 53: ...HYDRAULIC SYSTEMS ...
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Страница 85: ...ELECTRICAL SYSTEM ...
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Страница 119: ...VIBRATORY DRUM REAR AXLE ...
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Страница 169: ...BRAKE ...
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Страница 179: ...INSPECTION AND ADJUSTMENT ...
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Страница 207: ...TROUBLESHOOTING ...
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