Solar Sensor Circuit (Driver Side) - Air Conditioning System (for Automatic Air Conditioning System)

AIR CONDITIONING: AIR CONDITIONING SYSTEM (for Automatic Air Conditioning System): B1424/24: Solar Sensor Circuit (Driver Side)
B1424/24 - Solar Sensor Circuit (Driver 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 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





INSPECTION PROCEDURE

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

PROCEDURE

1. READ VALUE USING TECHSTREAM (SOLAR SENSOR (for Driver Side))

(a) Use the Data List to check if the driver side solar sensor is functioning properly.

Air Conditioner





OK:

The display is as specified in the normal condition.

Result





C -- REPLACE AIR CONDITIONING AMPLIFIER Removal

B -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE Air Conditioning System (For Automatic Air Conditioning System)
A -- Continue to next step.

2. CHECK HARNESS AND CONNECTOR (SOLAR SENSOR)





(a) Disconnect the K19 solar sensor connector.

(b) Measure the resistance according to the value(s) in the table below.

Standard resistance:





(c) Measure the voltage according to the value(s) in the table below.

Standard voltage:





NG -- CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - SOLAR SENSOR AND BODY GROUND)
OK -- Continue to next step.

3. CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER - SOLAR SENSOR)





(a) Disconnect the J19 air conditioning amplifier connector.

(b) Disconnect the K19 solar sensor connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

4. CHECK AUTOMATIC LIGHT CONTROL SENSOR (SOLAR SENSOR (TSL - CLTE VOLTAGE))





(a) Remove the solar sensor with its connector still connected Removal.

(b) Apply battery voltage between terminals 6 (CLTB) and 3 (CLTE) of the solar sensor.

(c) Measure the voltage according to the value(s) in the table below.

Standard voltage:





HINT
* As the inspection light is moved away from the sensor, the voltage decreases.
* Use an incandescent light for inspection. Bring it about 30 cm (11.8 in.) from the solar sensor.

NG -- REPLACE AUTOMATIC LIGHT CONTROL SENSOR (SOLAR SENSOR) Removal

OK -- REPLACE AIR CONDITIONING AMPLIFIER Removal

5. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - SOLAR SENSOR AND BODY GROUND)





(a) Disconnect the J3 ECU connector.

(b) Disconnect the K19 solar sensor connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE MAIN BODY ECU