Service manual

ELECTRICAL SYSTEM 16-83
Switches and Sensor
Water Temperature Sensor Inspection
•
Remove the water temperature s ensor (see Water Tem-
perature Sensor Removal/Installation in the Fuel System
(DFI) chapter).
•
Suspend the sensor [A] in a container of machine oil so
that the heat-sensitive portion and threaded portion are
submerged.
•
Suspend an accurate thermometer [B] with heat-sensitive
portions [C] located in almost the same depth.
NOTE
○
The sensor and thermometer must not touch the con-
tainer side or bottom.
•
Place the container over a source of heat and gradually
raise the temperature of the oil while stirring the oil gently
for even temperature.
•
Using the hand tester, measure the internal resistance of
the sensor across the terminal and the body at the tem-
peratures shown in the table.
If the measurement is out of the range, replace the sensor.
Water Temperature Sensor Resistance
Temperature Resistance (kΩ)
−20°C (−4°F) *18.80 ±2.37
0°C (32°F) *(about 6.544)
40°C (104°F) 1.136 ±0.095
100°C (212°F) 0.1553 ±0.0070
*: Reference Information
Speed S ensor Removal/Installation
•
Drain the engine oil (see Engine Oil Change in the Peri-
odic Maintenance Chapter).
•
Remove:
Bolts [A]
Speed Sensor [B]
Guard [C]
•
Disconnect the speed sensor Connector [D].
•
Replace the O-ring with a new one.
•
Apply grease to the O-ring
•
Tighten:
Torque - Speed Sensor Mounting Bolt: 8.8 N·m (0.90 kgf·m,
78 in·lb)
Speed Sensor Inspection
•
Remove the speed sensor (see Speed Sensor Removal).
•
Connect the speed sensor connector [A] with the battery
[B], 10 kΩ resistor [C] and hand tester [D] as shown.
•
Set the tester to the DC 25 V range.
Special Tool - Hand Tester: 57001-1394