22−12

22−12
Main Menu
Table of Contents
Troubleshooting
Self-diagnosis Circuit Check
The Automatic Climate Control System has a built-in self diagnosis feature. To run it, turn the ignition switch ON (II),
0
then turn the fan speed dial to the AUTO position. Set the temperature control dial to 60° F(18°C),
then gradually move
the dial up the temperature range to 90°F (32°C). At each temperature setting, push both the AUTO and OFF burtons
on the control unit at the same time. Wait for at least one minute for the system to readjust and check for problems.
If any problems are found in circuits "A" through "I", the system will indicate which circuit has the problem by lighting
the respective indicator light.
NOTE: The climate control unit does not memorize which self-diagnosis indicator lights come on. If you turn the ignition switch OFF, the indicator light memory will be lost.
AUTO BUTTON
TEMPERATURE
CONTROL DIAL
INDICATOR
OFF BUTTON
FAN SPEED DIAL
TEMP DISPLAY
COMPONENT WITH PROBLEM
POSSIBLE CAUSE
Refer to PAGE
IN-CAR TEMPERATURE SENSOR
Open or short circuit
22-16
B
OUTSIDE AIR TEMPERATURE
SENSOR
Open or short circuit
22-18
C
SUNLIGHT SENSOR
Open or short circuit
22-20
D
HEATER CORE TEMPERATURE
SENSOR
Open or short circuit
22-22
E
EVAPORATOR TEMPERATURE
SENSOR
Open or short circuit
22-24
22-26
A
MODE
F
A/C
AIR MIX CONTROL MOTOR
Open or short circuit
Air mix door stuck
G
ON (A/C)
MODE CONTROL MOTOR
Open position signal circuit
Mode door stuck
H
OFF (A/C)
RECIRCULATION CONTROL MOTOR
Open position signal circuit
I
LED on
defroster
button
VENT DOOR CONTROL MOTOR
Open or short circuit
Vent door stuck
22-28
22-30
22-32
NOTE:
When you turn the ignition switch OFF, the self-diagnosis function will be canceled.
After completing repair work, run the self-diagnosis again to make sure that there are no other malfunctions.
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