Sakai SV540 Series, Shop Manual

Page: 245 / 306

9-037
TROUBLESHOOTING
2-4-5. Starter motor runs even when F-R lever is not at “N” and parking brake is not
applied
Reference Fig.: 2-4-1
Check point Check/Cause Action
1. F-R Lever Switch when starter switch is OFF and F-R lever is “F” or “R”,
check continuity between F-R lever switch terminal COM
and terminal NC.
There is no continuity in normal condition.
If there is continuity, F-R lever switch is faulty.
•
•
Replace F-R lever
switch.
2. Parking Brake Switch when starter switch is OFF and parking brake switch is
released position, check continuity between parking brake
switch terminal 1 and 2.
There is no continuity in normal condition.
If there is continuity, parking brake switch is faulty.
•
•
Replace parking brake
switch.
2-4-6. Engine speed cannot be switched
Reference Fig. : 2-4-1
Check point Check/Cause Action
1. Throttle Switch
(1) when throttle switch is “IDLE”, check continuity between
throttle switch terminals 1 and 2, 4 and 6.
There is continuity in normal condition.
(2) when throttle switch is “MID”, check continuity between
throttle switch terminals 1 and 3, 4 and 6.
There is continuity in normal condition.
(3) when throttle switch is “FULL”, check continuity
between throttle switch terminals 1 and 3, 4 and 5.
There is continuity in normal condition.
If above item (1), (2) or (3) is NG, throttle switch is faulty. •
Replace throttle switch.
2. Throttle Relay (B-1)
(1) when starter switch is ON and throttle switch is “FULL”,
measure voltage between throttle relay (B-1) terminal 1
inlet wire LB and chassis ground.
Standard voltage : 24 V or more
(2) when starter switch is ON and throttle switch is “FULL”,
measure voltage between throttle relay (B-1) terminal 5
outlet wire LW and chassis ground.
There is electricity in normal condition.
(3) when starter switch is ON and throttle switch is “MID”,
measure voltage between throttle relay (B-1) terminal 4
outlet wire WL and chassis ground.
There is electricity in normal condition.
If above item (1) is OK and item (2) or (3) is NG, throttle
relay (B-1) is faulty.
•
Replace throttle relay
(B-1).
3. 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.