Sakai SW300-1, Shop Manual

Page: 205 / 246

10-022
TROUBLESHOOTING
2-3-2. Brake cannot be released
• 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 voltage : 6.5
± 0.3
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 RY 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 RW 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 RW 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 WB 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.
10̲TROUBLESHOOTING̲oku.indd 10-022 10̲TROUBLESHOOTING̲oku.indd 10-022 2012/11/14 20:25:56 2012/11/14 20:25:56