Sakai R2H-2, Shop Manual

Page: 109 / 151

10-030
TROUBLESHOOTING
2-4. Water Sprays
Check following items before troubleshooting.
• No blown fuses.
• Check any ground circuit which belongs to components to be checked.
2-4-1. Continuous water spray does not operate
• Water spray switch must be “ON” (continuous spraying).
Reference Fig. : 2-4-1
Check point Check/Cause Action
1. Water Spray Pump (1) When starter switch is ON, measure voltage between
water spray pump terminal inlet wire LW 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 g inlet wire LY and chassis
ground.
Standard voltage: 12 V or more
(2) When starter switch is ON, measure voltage between
water spray relay terminal G inlet wire LB and chassis
ground.
Standard voltage: 12 V or more
(3) When starter switch is ON, measure voltage between
water spray relay terminal B outlet wire LW 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 LB 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 LY 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.