B2631

B2630, B2631 SUNLOAD SENSOR

DTC Logic


DTC DETECTION LOGIC

NOTE:
- If DTC is displayed along with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to HAC55, "DTC Logic".
- If DTC is displayed along with DTC U1010, first perform the trouble diagnosis for DTC U1010. "DTC Logic" Control Unit.
- Sunload sensor may register a malfunction when indoors, at dusk, or at other times when light is insufficient.
When performing the diagnosis indoors, use a lamp (60 W or more) that is pointed at the sunload sensor.






DTC CONFIRMATION PROCEDURE


1. PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT
1.Turn power switch ON.
2.Select "Self Diagnostic Result" mode of "HVAC" using CONSULT.
3.Check DTC.
Is DTC detected?
YES- Refer to "Diagnosis Procedure" .
NO- INSPECTION END


Diagnosis Procedure


1. CHECK SUNLOAD SENSOR VOLTAGE SIGNAL

1.Turn power switch ON.
2.Operate the automatic air conditioning system.
3.Move 60 W lamp to or from the sunload sensor to check that a voltage signal between A/C auto amp. harness connector terminals changes.





Is the inspection result normal?
YES- GO TO 7.
NO- GO TO 2.

2. CHECK SUNLOAD SENSOR POWER SUPPLY

1.Turn power switch OFF.
2.Disconnect sunload sensor connector.
3.Turn power switch ON.
4.Check voltage between sunload sensor harness connector and ground.





Is the inspection result normal?
YES- GO TO 3.
NO- GO TO 5.

3. CHECK SUNLOAD SENSOR GROUND CIRCUIT FOR OPEN

1.Turn power switch OFF.
2.Disconnect 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 4.
NO- Repair harness or connector.

4. REPLACE SUNLOAD SENSOR

1.Replace sunload sensor. Refer to "Removal and Installation" Service and Repair.
2.Perform DTC confirmation procedure. Refer to "DTC Logic" .
3.Check DTC.
Is DTC detected?
YES- Replace A/C control (A/C auto amp.). Refer to "Removal and Installation" Service and Repair.
NO- INSPECTION END

5. CHECK SUNLOAD SENSOR POWER SUPPLY CIRCUIT FOR OPEN

1.Turn power switch OFF.
2.Disconnect 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 6.
NO- Repair harness or connector.

6. CHECK SUNLOAD SENSOR POWER SUPPLY CIRCUIT FOR SHORT

Check continuity between sunload sensor harness connector and ground.





Is the inspection result normal?
YES- Replace A/C control (A/C auto amp.). Refer to "Removal and Installation" Service and Repair.
NO- Repair harness or connector.

7. CHECK INTERMITTENT INCIDENT

Check intermittent incident. Refer to "Intermittent Incident" Intermittent Incident.
Is the inspection result normal?
YES- Replace A/C control (A/C auto amp.). Refer to "Removal and Installation" Service and Repair.
NO- Repair or replace malfunctioning parts.