DTC Logic

DTC DETECTION LOGIC

NOTE

:
• If DTC is displayed along with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to HAC- 141, "DTC Logic".

• If DTC is displayed along with DTC U1010, first perform the trouble diagnosis for DTC U1010. HAC-142, "DTC Logic".

• 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-III

1. Turn ignition switch ON.

2. Select “Self Diagnostic Result” mode of “HVAC” using CONSULT-III.

3. Check DTC.

Is DTC detected? YES >> Refer to HAC-152, "Diagnosis Procedure".

NO >> INSPECTION END

Diagnosis Procedure

1.CHECK SUNLOAD SENSOR POWER SUPPLY

1. Turn ignition switch OFF.

2. Disconnect sunload sensor connector.

3. Turn ignition switch ON.

4. Check voltage between sunload sensor harness connector and ground.

Is the inspection result normal? YES >> GO TO 2.

NO >> GO TO 4.

2.CHECK SUNLOAD SENSOR GROUND CIRCUIT FOR OPEN

1. Turn ignition 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 3.

NO >> Repair harness or connector.

3.CHECK SUNLOAD SENSOR

1. Disconnect A/C auto amp. connector.

2. Check sunload sensor. Refer to HAC-147, "Component Inspection".

Is the inspection result normal? YES >> Replace A/C auto amp. Refer to HAC-188, "Removal and Installation".

NO >> Replace sunload sensor. Refer to HAC-191, "Removal and Installation".

4.CHECK SUNLOAD SENSOR POWER SUPPLY CIRCUIT FOR OPEN

1. Turn ignition 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 5.

NO >> Repair harness or connector.

5.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 auto amp. Refer to HAC-188, "Removal and Installation".

NO >> Repair harness or connector.

Component Inspection

1.CHECK SUNLOAD SENSOR

1. Turn ignition switch ON.

2. Check voltage between A/C auto amp. harness connector and ground. Refer to 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 sunload sensor. Refer to HAC-191, "Removal and Installation".