Evaporator Temperature Sensor Test; Power Transistor Test - Acura 3.5 RL Manual

Evaporator Temperature
Sensor
Test
Compare the resistance reading between the No. 1 and
No. 2 terminals of the evaporator temperature sensor
with the specifications shown in following graph; resis-
tance should be within specifications.
NOTE: Dip the sensor in ice water, and measure resis-
tance. Then pour hot water on the sensor, and check for
change in resistance.
CAUTION: The sensor uses a thermistor which can be
damaged if high current is applied during testing.
Therefore, use a circuit tester with an output of 1 mA or
less at the 20 k range.
EVAPORATOR TEMPERATURE SENSOR
2P CONNECTOR
Terminal side of male terminals
RESISTANCE
k
Power Transistor
Test
1. Disconnect the 3P connector from the power tran-
sistor.
2. Pull out the No. 2 (ORN) terminal from the connec-
tor.
3. Connect a 1.2 - 3.4 watt bulb as shown, then recon-
nect the 3P connector to the power transistor.
No. 3 (BLU/RED)
4. Turn the ignition switch ON (II), and check that the
blower motor runs.
CAUTION:
To avoid a loose or disconnected terminal, be careful
not to damage the locking tab when disconnecting
and connecting the terminal.
Insulate the No. 2 (ORN) terminal from the body until
the testing is completed.
12V 1.2-3.4 W
BULB