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17-84 ELECTRICAL SYSTEM
Carburetor Heater Syst em
Air Temperature Sensor Inspection
•
Remove:
Air Cleaner Housing (see Fuel System chapter)
Air Temperature Sensor [A]
•
Connect the battery [A] and hand tester [B] to the sensor
lead connector [C].
Special Tool - Hand Tester: 57001-1394
Battery
(+) → Red and Yellow Leads
(−) → Black Lead
Hand Tester
(+) → White Lead
(−) → Black Lead
CAUTION
Use the sensor within − 30 ∼ 80°C (− 22 ∼ 176°F). If it
is used without the specified range, the sensor will
be damaged.
•
Suspend the sensor [A] in a container of cold water of less
than 8°C (46.4°F) so that the temperature sensing part [B]
is submerged as shown.
[C] Ice
•
Suspend an accurate thermometer [D] in the water.
•
Measure the output voltage between W/Y terminal and
battery (–) terminal (tester range: DC 25 V).
Air Temperature Sensor: less than 8°C (46.4°F)
Output Voltage: 8 ∼ 16 V (near battery voltage)
If the voltage is less than DC 0.1 V, replace the sensor.
•
Warm up the sensor [A] more than 22°C (71.6°F) with a
hand.
•
Measure the output voltage between W/Y terminal and
battery (–) terminal (tester range: DC 2.5 V).
Air Temperature Sensor: more than 22°C (71.6°F)
Output Voltage: less than 0.1 V
If the voltage is 8 ∼ 16 V, replace the sensor.