The In-Car Temperature Sensor measures the temperature of the passenger compartment. The voltage signal is delivered to the HVAC control unit. This information is used to control the vent output temperature.
DTC B1233 sets if the In-Car Temperature Sensor signal is at or below 0.1V for 0.3 seconds.
Item | Detecting Condition | Possible Cause |
DTC Strategy |
•
Voltage check | 1. Short circuit in harness. 2. Faulty incar temp.sensor. 3. Faulty A/C Control Unit. |
Enable Conditions |
•
Ignition ON | |
Threshold value |
•
Sensor signal is at or below 0.1V for 0.3 seconds. | |
Failsafe |
•
Substituded In-Car Temp. = 25℃ (77℉) |
※ Resistance value of incar temp sensor as a function of temperature.
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 |
