Solar Sensor Circuit (Driver Side) - Air Conditioning System

HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM: B1424/24: Solar Sensor Circuit (Driver Side)
B1424/24 - Solar Sensor Circuit (Driver Side)

DESCRIPTION

The automatic light control sensor (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 automatic light control sensor (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 automatic light control sensor (solar sensor).

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

1. READ VALUE USING TECHSTREAM (SOLAR SENSOR (D SIDE))

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / Air Conditioner / Data List / Solar Senor (D Side).

(e) According to the display on the Techstream, read the Data List.

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 Problem Symptoms Table
A -- Continue to next step.

2. CHECK HARNESS AND CONNECTOR (SOLAR SENSOR)

(a) Disconnect the I21 automatic light control sensor (solar sensor) connector.

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

Standard Resistance:

(d) Reconnect the automatic light control sensor (solar sensor) connector.

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

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

(a) Disconnect the H24 air conditioning amplifier connector.

(b) Disconnect the I21 automatic light control sensor (solar sensor) connector.

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

Standard Resistance:

(d) Reconnect the automatic light control sensor (solar sensor) connector.

(e) Reconnect the air conditioning amplifier connector.

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 automatic light control sensor (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.

(d) Reinstall the automatic light control sensor (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, BODY GROUND)

(a) Disconnect the H3 main body ECU connector.

(b) Disconnect the I21 automatic light control sensor (solar sensor) connector.

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

Standard Resistance:

(d) Reconnect the automatic light control sensor (solar sensor) connector.

(e) Reconnect the main body ECU connector.

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE MAIN BODY ECU