B1421

DTC B1421/21 Solar Sensor Circuit (Passenger Side)

DESCRIPTION

DTC Detection Condition:

The solar sensor, which is installed on the upper side of the instrument panel, detects sunlight and controls the air conditioning in AUTO mode. The output current from the solar sensor varies according to the amount of sunlight. When the sunlight increases, the output current increases. As the sunlight decreases, the output current decreases. The air conditioning amplifier detects output current from the solar sensor.

Wiring Diagram:

Step 1:

Step 1(Continued)-2:

Step 3:

Step 4-5:

Step 5(Continued):

INSPECTION PROCEDURE

HINT: If DTC B1244 is output at the same time, troubleshoot DTC B1244 first.