Sakai SW300-1, Shop Manual

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10-030
TROUBLESHOOTING
2-5. Spray System
Check following item before troubleshooting.
• No blown fuse and power is applied up to fuses.
• Check any ground circuit which belongs to components to be checked.
2-5-1. Water spray does not operate
• Water spray switch must be ON.
Reference Fig.: 2-5-1
Check point Check/Cause Action
1. Water Spray Pump (1) When starter switch is ON, measure voltage between
water spray pump terminal inlet wire LB and chassis
ground.
Standard voltage: 12 V or more
(2) Check that no abnormality is found in water spray pump
ground terminal.
• If above items (1) and (2) are OK and water spray pump
does not operate, water spray pump is faulty.
Replace water spray
pump.
2. Water Spray Relay (1) When starter switch is ON, measure voltage between
water spray relay terminal 1 inlet wire LW and chassis
ground.
Standard voltage: 12 V or more
(2) When starter switch is ON, measure voltage between
water spray relay terminal 3 inlet wire LY and chassis
ground.
Standard voltage: 12 V or more
(3) When starter switch is ON, measure voltage between
water spray relay terminal 5 outlet wire LB and chassis
ground.
Standard voltage: 12 V or more
• If above items (1) and (2) are OK and item (3) is NG,
water spray relay is faulty.
Replace water spray
relay.
3. Water Spray Switch (1) When starter switch is ON, measure voltage between
water spray switch terminal 1 inlet wire LY and chassis
ground.
Standard voltage: 12 V or more
(2) When starter switch is ON, measure voltage between
water spray switch terminal 2 outlet wire LW and chassis
ground.
Standard voltage: 12 V or more
• If above item (1) is OK and item (2) is NG, water spray
switch is faulty.
Replace water spray
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.
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