Page 1137 of 1146

FULL AUTO AIR CONDITIONER - Troubleshootina55-55
DIAGNOSISDISPLAY PAlTERNS AND CODES
/
L
ii
CodeDisplay pattern (output codes)CauseFail safe(use with voltmeter)
0Normal
ON
OFFContinuous
I1 n
Open-circuited room-temperature sensorCondition in which 25°C
(77°F) is detected
I2 n
Short-circuited room-temperature sensor
I3 n
Open-circuited outside-air sensorCondition in which 20°C
(68°F) is detected
I4 n
Short-circuited outside-air sensor
12A0104
21 -,llJlL
Open-circuited air therm0 sensorCondition in which -2°C(-35.6”F) is detected
22 nn
Short-circuited air therm0 sensor
31 J-[-u1 1Short-circuited and open-circuitedair mix damper potentiometerMAX. HOT(or MAX. COOL when itis at MAX. COOL)
32 nnn
Short-circuited and open-circuitedDEF.mode selector damper potentiometer(or FACE when it isat FACE)
12A0107
41, nnnn
Defective air mix damper motor
42Defective mode selector damper motor
1uuuI nn12A0105
NOTE:(1) If two or more abnormal conditions occur at the same time, the code numbers are alternately displayed, in
order, repeatedly.
(2) The nature of the malfunction is entered and stored in the memory from the time the malfunction occurs until
the ignition switch is next turned to OFF.TSB Revision
Page 1142 of 1146
55-60
SENSORSFULL AUTO AIR CONDITIONER
- Sensors
REMOVAL AND INSTALLATIONM550A- _
4*1. Passenger compartment temperature sen-sor2OFOO63
Outside air sensor removal steps
2. Stopper
3. Glove box outer case
4. Photo sensor connector connection
5. Photo sensorWater temperature sensor removal steps
2. StopperI3: F/it; box outer case assembly
7. Water temperature sensorOutside-air-temperature sensor removal steps
2. Stopper
3. Glove box outer case assembly
8. Outside-air-temperature sensor
82OFOO75
-
Passenger compartment
temperature sensor
SERVICE POINTS OF REMOVALM5506AE
1. REMOVAL OF PASSENGER COMPARTMENT TEMPER-
ATURE SENSOR
2OPO164LlTSB Revision
Using the trim stick, remove the passenger compartmenttemperature sensor from the headlining.
I~’
I
d
I
d
Page 1143 of 1146

FULL AUTO AIR CONDITIONER - Sensors55-615. REMOVAL OF PHOTO SENSOR
Using a trim stick, remove the photo sensor from the
defroster garnishes.
Thermometer
2OAO19:
c
3
INSPECTIONM55OcALl
WATER TEMPERATURE SENSOR
(1) Dip the water-temperature sensor in hot water and, using astove, etc., raise the water temperature.
(2) Check that the water-temperature sensor is conductive
when the water temperature reaches the specified temper-
ature.Standard value: 26.5 + 4°C (79.7
+ 7.2”Fl
OUTSIDE-AIR-TEMPERATURE SENSOR
The condition can be considered normal if the resistances are
measured within the ranges of 3.98
- 4.12 kilohms and 2.21 -
2.35 kilohms, respectively, when the outside-air-temperature
sensor is submerged in warm water of 25°C (77°F) and 40°C(104°F) for one minute or longer each.
NOTE
The relationship between the outside-air-temperature and theresistance values is as shown below.
&$$nt temperatureI-10 /0110 / i01 25/ 301 40 /(14) (32) (50) (68) (77) (86) (104)
Resistance value(reference) k0
1 TSB Revision