NO.2 CABIN TEMPERATURE SENSOR MALFUNCTION

id070200809800

Cabin temperature sensor malfunction
POSSIBLE CAUSE | • Cabin temperature sensor malfunction • Open or short circuit in wiring harness between climate control unit and cabin temperature sensor

Diagnostic Procedure

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