Ignition "OFF"
Disconnect Evaporator sensor and Connect A/C control module main harness connector.
Measure resistance between Signal(+) terminal of Evaporator sensor harness connector and Sensor ground harness connector. (Component side)
Specification : Refer the specifications in Fig.1)
Temperature(℃/℉) | Resistance(㏀) | Temperature(℃/℉) | Resistance(㏀) |
-10/14 | 43.3 | 20/68 | 12.1 |
0/32 | 27.6 | 30/86 | 8.3 |
10/50 | 18 | 40/104 | 5.8 |
Fig.1) Resistance value of Evaporator sensor as a function of temperature.
Is measured value within specification?
 | ▶ Perform following procedures. |
 | ▶ Substitute with a known-good Evaporator sensor and check for proper operation. If the problem is corrected, replace Evaporator sensor and then go to "Verification of Vehicle Repair" procedure. |
Ignition "OFF"
Disconnect Evaporator sensor and Connect A/C control module main harness connector.
Ignition "ON", Engine "OFF".
Measure voltage between Signal(+) terminal of Evaporator sensor harness connector and chassis ground. (Component side)
Specification : Approx. 5V
Is measured value within specification?
| ▶ Check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to "Verification of Vehicle Repair" procedure. |
| ▶ Substitute with a known-good A/C control module and check for proper operation. If the problem is corrected, replace A/C control module and then go to "Verification of Vehicle Repair" procedure. |
