Sakai SV201-1, Shop Manual

Page: 199 / 238

9-022
TROUBLESHOOTING
2-3. Propulsion
Check following items before troubleshooting.
No blown fuses and power is applied up to fuses.
Check any ground circuit which belongs to components to be checked.
2-3-1. Machine moves neither forward nor backward
Parking brake switch must be released.
Foot brake switch must be ON (Brake pedal is not depressed).
Reference Fig.: 2-3-1
Check point Check/Cause Action
1. Parking Brake Solenoid Disconnect harness and measure resistance of coil.
Standard resistance : 12.3
± 1.2
Ω
If measured resistance is abnormal, parking brake
solenoid is faulty.
•
•
Replace parking brake
solenoid.
2. Foot Brake Switch (1) When starter switch is ON, measure voltage between
foot brake switch terminal COM inlet wire R and chassis
ground.
Standard voltage : 12 V or more
(2) When starter switch is ON, measure voltage between
foot brake switch terminal NO outlet wire LgR and
chassis ground.
Standard voltage : 12 V or more
If above item (1) is OK and item (2) is NG, foot brake
switch is faulty.
•
Replace foot brake
switch.
3. Parking Brake Switch (1) When starter switch is ON, measure voltage between
parking brake switch terminal 1 inlet wire LgR and
chassis ground.
Standard voltage : 12 V or more
(2) When starter switch is ON, measure voltage between
parking brake switch terminal 3 outlet wire BrW and
chassis ground.
Standard voltage : 12 V or more
If above item (1) is OK and item (2) is NG, parking brake
switch is faulty.
•
Replace parking brake
switch.
4. Harness Connecting
Between Terminals
Measure resistance of harness connecting between
terminals.
Standard resistance : 10 Ω or less
If resistance is abnormal, harness is faulty.
•
•
Repair or replace
harness.
•
•
•
•