B1419

DTC B1419/19 Rear Room Temperature Sensor Circuit

DESCRIPTION

DTC Detection Condition:

The rear room temperature sensor LH is installed in the rear door trim board LH 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 LH seat. As the temperature decreases, the resistance increases. As the temperature increases, the resistance decreases.

The rear door ECU LH sends the read signal to the air conditioning amplifier via the CAN communication line. The rear door ECU LH 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 LH.

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