DTC B1492/92 Infrared Ray Sensor Communication Malfunction: Description

This circuit consists of the infrared ray sensor and the air conditioning amplifier. The infrared ray sensor, which is installed on the rear roof, detects human body temperature and controls the heater and air conditioner "AUTO" mode in 4 zone. Signals are transmitted to the air conditioning amplifier via LIN communication line. This DTC is output when LIN communication between the infrared ray sensor and air conditioning amplifier stop for 10 seconds or more. If the LIN communication system malfunctions, the air conditioning amplifier does not operate even if the infrared ray sensor is normal.