Evaporator Temperature Sensor Test; Heater Fan Switch Test - Honda 2004 Odyssey Service Manual

Heating/Air Conditioning
Evaporator Temperature Sensor
Test
1. Dip the sensor in ice water, and measure the
resistance between its terminals.
EVAPORATOR TEMPERATURE SENSOR
Terminal side of male terminals
2. Then pour warm water on the sensor, and check for
a change in resistance.
3. Compare the resistance readings with the
specifications shown in the graph; the resistance
should be within the specifications.
40
30
RESISTANCE
k
20
10
32
0
21-40 21-40
50 68 86°F
10 20 30°C
TEMPERATURE

Heater Fan Switch Test

Check for continuity between the terminals in each
switch position according to the table.
Terminal
Position
OFF
1
2
3
4
HEATER FAN SWITCH
5
1 6
2 3 4