B1421

DTC B1421/21 Solar Sensor Circuit (Passenger Side)

DESCRIPTION

DTC Detection Condition:

The A/C 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 voltage from the A/C solar sensor varies according to the amount of sunlight. When the sunlight increases, the output voltage increases. As the sunlight decreases, the output voltage decreases. The A/C amplifier detects voltage output from the A/C 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.
- If the check is performed in a dark place, DTC B1421/21 or B1424/24 (solar sensor circuit abnormal) may be output.