Solar Sensor Circuit (Passenger Side) - Air Conditioning System (for Automatic Air Conditioning
System)
HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for Automatic Air Conditioning System): B1421/21: Solar Sensor
Circuit (Passenger Side)
B1421/21 - Solar Sensor Circuit (Passenger Side)
DESCRIPTION
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 voltage from the 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 solar sensor.
WIRING DIAGRAM
INSPECTION PROCEDURE
HINT
If the check is performed in a dark place, DTC B1421/21 (solar sensor circuit abnormal) may be output even though the system is
normal.
PROCEDURE
1. READ VALUE USING TECHSTREAM
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON and turn the Techstream on.
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