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ELECTRICAL COMPONENTS
7-41
EAS28170
CHECKING THE RECTIFIER/REGULATOR
1. Check:
• Rectifier/regulator output voltage
Out of specification → Replace the recti-
fier/regulator.
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a. Set the engine tachometer to the ignition
coil.
b. Connect the pocket tester (AC 20 V) to the
rectifier/regulator coupler as shown.
c. Start the engine and let it run at approxi-
mately 5000 r/min.
d. Measure the rectifier/regulator input volt-
age.
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EAS4D3F002
CHECKING THE THERMO SWITCH
1. Remove:
• Thermo switch
(from the wire harness)
2. Check:
• Thermo switch continuity
Out of specification → Replace the
thermo switch.
Step 1 and 2: Heating phase
Step 3 and 4: Cooling phase
3. Install
• Thermo switch
Rectifier/regulator output volt-
age
14 V at 5000 r/min
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
• Positive tester probe
Red “1”
• Negative tester probe
Black “2”
• Positive tester probe
Black “1”
• Negative tester probe
Black “2”
Test step Coolant temperature Continuity
1
Less than 16±3 °C
(60.8±5.4 °F)
YES
2
More than 16±3 °C
(60.8±5.4 °F)
NO
3
More than 11±3 °C
(51.8±5.4 °F)
NO
4
Less than 11±3 °C
(51.8±5.4 °F)
YES
A. Heating phase
B. Cooling phase