Specification
| Evaporator core Temperature [°C(°F)] | Resistance [Kohms] | Voltage[V] |
|---|---|---|
| 10(14) | 43.35 | 2.96 |
| 0(32) | 27.62 | 2.40 |
| 10(50) | 18.07 | 1.88 |
| 20(68) | 12.11 | 1.44 |
| 30(86) | 8.30 | 1.08 |
| 40(104) | 5.81 | 0.81 |
| 50(122) | 4.15 | 0.61 |
RESISTANCE REFERENCE CHART
- If the measured resistance is not specification, substitute with a known-good evaporator temperature sensor and check for proper operation.
- If the problem is corrected, replace the evaporator temperature sensor.
Scheme 2
Scheme 3
- Disconnect the negative (-) battery terminal.
- Remove the crash pad under cover (A).
- Disconnect the evaporator sensor connector (A).
- Remove the evaporator temperature sensor (B), by pulling it after rotating 90° in a counter clock wise direction. CAUTION: Take care that evaporator core pins are not bent.
- Installation is the reverse order of removal.
Scheme 4
- In-car air temperature sensor is located at the center fascia lower panel.
- The sensor contains a thermistor which measures the temperature of the inside. The signal decided by the resistance value which changes in accordance with perceived inside temperature, is delivered to heater control unit and according to this signal the control unit regulates incar temperature to intended value.
| Ambient Temperature [°C(°F)] | Resistance between terminals 1and 2 (kohms) |
|---|---|
| 30(14) | 480.41 ± 3% |
| 2032) | 271.21± 3% |
| 10(50) | 158.18± 3% |
| 0(68) | 95.10± 3% |
| 10(50) | 58.80± 3% |
| 20(68) | 37.32± 3% |
| 30(86) | 24.26± 3% |
| 40(104) | 16.13± 3% |
| 50(122) | 10.95± 3% |
RESISTANCE REFERENCE CHART
- If the measured resistance is not specification, substitute with a known-good ambient temperature sensor and check for proper operation.
- If the problem is corrected, replace the ambient temperature sensor.
Scheme 5
- Disconnect the negative (-) battery terminal.
- Remove the front bumper. (Refer to " «FRONT BUMPER»(ref-417737-S37452559852011083000000) ")
- Remove the ambient temperature sensor (A).
- Installation is the reverse order of removal.
| Condition | Output signal | Fresh/ recirculation |
|---|---|---|
| Normal condition | 3.75 ~ 4.85V | Fresh |
| Hazardous gas detection | 0.35 ~ 1.45V | Recirculation |
VOLTAGE REFERENCE CHART
Scheme 6
- AQS diagnosis and fail safe Detect the open of signal for 7 seconds without choosing the AQS switch when IG on. If 2.5V or more is detected for 3.5 seconds or more among 7 seconds, be judged the open of AQS signal. Operate as below fail safe function, while choosing AQS. Fail safe: Release the AQS (AQS cannot be selected), Fresh/recirculation maintains previous situation of AQS selection. NOTE: When IG is turned ON, AQS heats for 35 ± 2.5 seconds, it will output 2.5 ± 0.55V voltage during this time.