B1468

DTC B1468/68 Rear Passenger Side Room Temperature Sensor Circuit

DESCRIPTION

DTC Detection Condition:

The rear room temperature sensor RH is installed in the rear door trim board RH to detect the rear room temperature and control the heater and air conditioner "AUTO" mode. The resistance of the rear room temperature sensor changes in accordance with the rear room temperature for RH seat. As the temperature decreases, the resistance increases. As the temperature increases, the resistance decreases.

The rear door ECU RH sends the read signal to the air conditioning amplifier via the CAN communication line. The rear door ECU RH applies voltage (5 V) to the rear room temperature sensor and reads voltage changes as the resistance of the rear room temperature sensor changes. This sensor also sends the appropriate signals to the rear door ECU RH.

HINT: This circuit uses the CAN communication line. Before performing the inspection, check that the CAN communication system is functioning normally.

Wiring Diagram:

Step 1:

Step 2:

Step 3:

INSPECTION PROCEDURE