Speed Cannot Be Changed - Sakai R2-4 Shop Manual

2-4-3. Brake does not work 2/2
• Parking brake switch must be applied.
• Foot brake switch must be OFF (Brake pedal is depressed).
Reference Fig.: 2-4-1
Check point
3. Parking Brake Switch
4. Foot Brake Switch
5. Harness Connecting
Between Terminals

2-4-4. Speed cannot be changed

• Speed change switch must be "
Reference Fig.: 2-4-1
Check point
1. Speed Change
Solenoid
2. Speed Change Switch
3. Harness Connecting
Between Terminals
Check/Cause
(1) when starter switch is ON, measure voltage between
parking brake switch terminal 1 inlet wire WB 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 GW and
chassis ground.
There is no electricity in normal condition.
• If above item (1) is OK and item (2) is NG, parking brake
switch is faulty.
• when starter switch is ON, measure voltage between
foot brake switch terminal NO outlet wire Bw and chassis
ground.
There is no electricity in normal condition.
• If there is electricity, foot brake switch is faulty.
• Measure resistance of harness connecting between
terminals.
Standard resistance : 10 Ω or less
• If resistance is abnormal, harness is faulty.
".
Check/Cause
• Disconnect harness and measure resistance of coil.
Standard voltage : 8.5 Ω
• If measured resistance is abnormal, speed change
solenoid is faulty.
(1) when starter switch is ON, measure voltage between
speed change switch terminal 1 inlet wire WB and
chassis ground.
Standard voltage : 12 V or more
(2) when starter switch is ON, measure voltage between
speed change switch terminal 2 outlet wire O and
chassis ground.
Standard voltage : 12 V or more
• If above item (1) is OK and item (2) is NG, speed change
switch is faulty.
• Measure resistance of harness connecting between
terminals.
Standard resistance : 10 Ω or less
• If resistance is abnormal, harness is faulty.
TROUBLESHOOTING
Action
Replace parking brake
switch.
Replace foot brake
switch.
Repair or replace
harness.
Action
Replace speed change
solenoid.
Replace speed change
switch.
Repair or replace
harness.
10-033