Sakai SW800 Series, Shop Manual

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4-244
E-13 Coolant temperature gauge reads wrong
★
Other gauges and lamps operate correctly.
★ Measure the voltage with the starter switch ON.
1
2
• Repair or
renew wire.
• Repair or renew
thermo unit
mounting.
YES
NO
Is resistance of
thermo unit as
shown in table 2?
Does coolant tem-
perature gauge
indicate as shown
in table 1?
Is stated voltage
present at coolant
temperature gauge
terminal T that car-
ries wire Sb?
*Measure unit with
other parts removed.
Is stated voltage
present at thermo
unit terminal that
carries wire Sb?
YES
YES
NO
NO
4
YES
NO
3
• 3~8V
• Disconncect wire
from thermo unit.
Possible cause
Remedy
Thermo unit earth wire incor-
rectly connected or thermo
unit malfunctioning.
Thermo unit faulty. Renew.
Coolant temperature gauge
faulty.
Renew.
• 3~8V
• Disconncect wire
from thermo unit.
Wire Sb from Coolant temper-
ature gauge to thermo unit
not connected or incorrectly
connected.
Repair or renew
wire.
Coolant temperature gauge
faulty.
Renew.
Thermo unit termi-
nal wire Sb
Gauge reading
Disconnected Lowest
Grounded
Highest
Table 1
Thermo unit
temperature
Resistance ( Ω )
50°C 150~158
100°C
About 27.4
Table 2
Thermo unit
Sb
Fuse
15A
YW (WL)
Sb
B
150
Ω
SW8004012
Coolant temperature gauge
−
＋
T
Troubleshooting for Electric System
Electric wiring diagram for mode E-13
* Wire color codes in parentheses ( ): SW800
➡
From Machine No.10123
SW850
➡
From Machine No.10127
Codes with no parentheses
➡
Common to both models