SUBARU impreza SERVICE and USER MANUAL

DTC B14A1 SUNLOAD SENSOR CIRCUIT OPEN


HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)

DTC B14A1 SUNLOAD SENSOR CIRCUIT OPEN

DTC DETECTING CONDITION:

Sunload sensor circuit is open. (Displayed for current malfunction)

NOTE:

When the sunload sensor check is performed indoors or in the shade, it could be diagnosed as having an open circuit. Always check the sunload sensor in direct sunlight.

TROUBLE SYMPTOM:

Operation is performed as no sunload.

WIRING DIAGRAM:

Air conditioning system Air Conditioning System > WIRING DIAGRAM Air Conditioning System > WIRING DIAGRAM

STEPCHECKYESNO

1.CHECK CONNECTOR.

1) Check the condition of connector connection.

2) Read the DTC using Subaru Select Monitor.

Is B14A1 displayed?

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B14A1 SUNLOAD SENSOR CIRCUIT OPEN">Go to Step 2.

Check the connection of the sunload sensor circuit.

2.CHECK SUNLOAD SENSOR.

1) Disconnect the sunload sensor.

2) Short the connector.

3) Read the DTC using Subaru Select Monitor.

Is B14A2 displayed?

Replace the sunload sensor. Sunload Sensor (Auto A/C Model) > REMOVAL

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B14A1 SUNLOAD SENSOR CIRCUIT OPEN">Go to Step 3.

3.CHECK HARNESS.

1) Turn the ignition switch to ON.

2) Using the tester, measure the voltage between terminals.

Connector & terminal

(i51) No. 2 (+) — No. 1 (−):

Is the voltage 4.5 — 5.0 V?

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B14A1 SUNLOAD SENSOR CIRCUIT OPEN">Go to Step 4.

Repair or replace the open circuit of the harness.

4.CHECK HARNESS.

1) Disconnect the connector from the A/C control panel.

2) Using a tester, check continuity between terminals.

Connector & terminal

(i51) No. 1 — (i88) No. 14:

(i51) No. 1 — (i88) No. 16:

Is there continuity?

Replace the A/C control panel. Control Panel > REMOVAL

Repair or replace the short circuit of the harness.


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