Heater & Air Conditioning Control System (DTC/Circuit Diagnosis)

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.

   +		-		Voltage (Approx.)
   Sunload sensor
   Connector	Terminal
   M33	1	Ground		5 V

Is the inspection result normal?

YES

GO TO 2.

NO

GO TO 4.

1. Turn ignition switch OFF.
2. Check continuity between sunload sensor harness connector and ground.

   Sunload sensor		--		Continuity
   Connector	Terminal
   M33	2	Ground		Yes

Is the inspection result normal?

YES

GO TO 3.

NO

Repair harness or connector.

Check sunload sensor. Refer to Component Inspection .

Is the inspection result normal?

YES

Replace front air control. Refer to Removal and Installation - Front Air Control .

NO

Replace sunload sensor. Refer to Removal and Installation .

1. Turn ignition switch OFF.
2. Disconnect front air control connector.
3. Check continuity between sunload sensor harness connector and front air control connector.

   Sunload sensor		Front air control		Continuity
   Connector	Terminal	Connector	Terminal
   M33	1	M56	35	Yes

Is the inspection result normal?

YES

GO TO 5.

NO

Repair harness or connector.

Check continuity between sunload sensor harness connector and ground.

Is the inspection result normal?

YES

GO TO 6.

NO

Repair harness or connector.

1. Turn ignition switch ON.
2. Check voltage between sunload sensor harness connector and ground.

   +		-		Voltage (Approx.)
   Sunload sensor
   Connector	Terminal
   M33	1	Ground		0 V

Is the inspection result normal?

YES

Replace front air control. Refer to Removal and Installation - Front Air Control .

NO

Repair harness or connector.