STEP
INSPECTION
ACTION
1
• Inspect the evaporator temperature sensor. (See EVAPORATOR TEMPERATURE SENSOR INSPECTION [FULL-AUTO AIR CONDITIONER].)
• Is it normal?
Yes
Go to the next step.
No
Replace the evaporator temperature sensor. (See EVAPORATOR TEMPERATURE SENSOR REMOVAL/INSTALLATION [FULL-AUTO AIR CONDITIONER].)
2
• Disconnect the climate control unit connector and the evaporator temperature sensor connector.
• Is there an open circuit in the wiring harness between the following terminals of the climate control unit and the evaporator temperature sensor?
-
― 2E—B― 2L—A
Yes
Repair the wiring harness.
No
Go to the next step.
3
• Is there a short circuit to ground in the wiring harness between climate control unit terminal 2E and evaporator temperature sensor terminal B?
Yes
Repair the wiring harness.
No
Connect the climate control unit connector, then go to the next step.
4
• Switch ignition to ON.
• Inspect the voltage at the following climate control unit terminal (wiring harness-side).
-
― Terminal 2E (evaporator temperature sensor input signal)
• Is the voltage normal? (Approx. 5 V)
Yes
The system is normal at present. (Clear the past malfunction from the memory.)
No
Inspect the connection of the climate control unit connector.
