Solar Sensor: Testing and Inspection

SUNLOAD SENSOR





Description

COMPONENT DESCRIPTION





- The sunload sensor (1) is installed to the right side of instrument panel assembly.
- The sunload sensor converts the sunload amount (illuminance) into the current value with the photodiode. The A/C auto amp. calculates this current value to the voltage and inputs it.

SUNLOAD AMOUNT CORRECTION
- The A/C auto amp. inputs the sunload amount detected with the sunload sensor.
- Perform the correction of the sunload amount detected with the sunload sensor for each air conditioner control.
- When the sunload amount suddenly changes, for example when entering a tunnel, perform the correction so that the recognition sunload amount of the A/C auto amp. changes slowly.




Diagnosis Procedure
1.CHECK SUNLOAD SENSOR POWER SUPPLY CIRCUIT
1. Turn the ignition switch OFF.
2. Disconnect the sunload sensor connector.
3. Turn the ignition switch ON.
4. Check voltage between sunload sensor harness connector and the ground.






Is the inspection result normal?
YES - GO TO 2.
NO - GO TO 4.
2.CHECK SUNLOAD SENSOR GROUND CIRCUIT CONTINUITY
1. Turn the ignition switch OFF.
2. Disconnect the A/C auto amp. connector.
3. Check continuity between sunload sensor harness connector and A/C auto amp. harness connector.






Is the inspection result normal?
YES - GO TO 3.
NO - Repair the harnesses or connectors.
3.CHECK SUNLOAD SENSOR
1. Connect the sunload sensor connector.
2. Connect the A/C auto amp. connector.
3. Check the sunload sensor components. SEE Component Inspection.
Is the inspection result normal?
YES - INSPECTION END
NO - Replace the sunload sensor.
4.CHECK SUNLOAD SENSOR OPEN CIRCUIT
1. Turn the ignition switch OFF.
2. Disconnect the A/C auto amp. connector.
3. Check continuity between sunload sensor harness connector and A/C auto amp. harness connector.






Is the inspection result normal?
YES - GO TO 5.
NO - Repair the harnesses or connectors.
5.CHECK SUNLOAD SENSOR SHORT CIRCUIT
Check continuity between sunload sensor harness connector and the ground.






Is the inspection result normal?
YES - Replace the A/C auto amp.
NO - Repair the harnesses or connectors.




Component Inspection
1.CHECK SUNLOAD SENSOR
1. Turn the ignition switch ON.
2. Check the input voltage from sunload sensor between A/C auto amp. harness connector and the ground. Refer to the applicable table for the normal value.











NOTE:
- When checking indoors, use a lamp of approximately 60 W. Move the lamp towards and away from the sensor to check.
- The sunload amount produced by direct sunshine in fair weather is equivalent to approximately 0.77 kW/m2 (662 kcal/m2-h).
Is the inspection result normal?
YES - INSPECTION END
NO - Replace the sunload sensor.