Sakai R2-4, Руководство по ремонту

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10-053
TROUBLESHOOTING
2-6-10. Tachometer reading is abnormal
Reference Fig.: 2-6-2
Check point Check/Cause Action
1. Combination Meter
(Tachometer)
(1) when starter switch is ON, measure voltage between
combination meter terminal wires and ground terminal
wire.
Battery (12 V) terminal wire No.73 inlet wire L and
ground terminal wire No.2 wire B
Starter switch (ACC) terminal wire No.65 inlet wire Y
and ground terminal wire No.2 wire B
Standard voltage : 12 V or more
(2) Check that combination meter rev. ratio SEL.2 terminal
wire No.2 wire B is grounded.
(3) Start engine and measure pulse between combination
meter rev. pulse input • 2 terminal wire No.8 wire Br and
chassis ground.
Standard pulse : 3 pulses/rotation of engine
If above item is OK and tachometer reading is NG,
combination meter is faulty.
•
•
•
Replace combination
meter.
2. 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.
2-6-11. Hour meter is abnormal
Reference Fig.: 2-6-2
Check point Check/Cause Action
1. Combination Meter
(Hour meter)
when starter switch is ON, measure voltage between
combination meter terminal wires and ground terminal
wire.
Battery (12 V) terminal wire No.73 inlet wire L and
ground terminal wire No.2 wire B
Starter switch (ACC) terminal wire No.65 inlet wire Y
and ground terminal wire No.2 wire B
Standard voltage : 12 V or more
If no abnormality is found, combination meter is faulty.
•
•
•
•
Replace combination
meter.