The In Car Tenperature Sensor contains a thermistor which measures the temperature of the inside the vehicle. The signal, based on the resistance value, is delivered to the HVAC control unit. This information is used to control the vent output temperature.
Air conditioner Control Module sets DTC B1234 if Incar temperature sensor has been detected over 4.9V for 0.3 seconds.
Item | Detecting Condition | Possible cause |
DTC Strategy |
•
Voltage check |
•
Poor connection in wireharness
•
Open in signal circuit
•
Short to battery in signal circuit
•
Faulty Incar temperature sensor
•
Faulty Air conditioner Control Module |
Enable Conditions |
•
IG KEY ON | |
Threshold value |
•
Incar temperature sensor has been dtected over 4.9V for 0.3 seconds. | |
Failsafe |
•
Control with the value of 25℃(77℉) |
Temperature(℃/℉) | Resistance(㏀) | Temperature(℃/℉) | Resistance(㏀) |
-20/-4 | 285.6 | 20/68 | 37.4 |
-10/14 | 169 | 30/86 | 24.1 |
0/32 | 97.7 | 40/104 | 15.9 |
10/50 | 59.67 | 50/122 | 10.8 |
