Subaru Crosstrek manuals

Subaru Crosstrek Service Manual: Dtc b14a1 sunload sensor circuit low/open

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

DTC B14A1 SUNLOAD SENSOR CIRCUIT LOW/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">

STEPCHECKYESNO

1.CHECK CONNECTOR.

1) Check the condition of connector connection.

2) Read the DTC using Subaru Select Monitor. Read Diagnostic Trouble Code (DTC)">

Is B14A1 displayed?

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

Even if DTC is displayed, the circuit has returned to a normal condition at this time. Reproduce the failure, and then perform the diagnosis again.

NOTE:

In this case, temporary poor contact of connector, temporary open or short circuit of harness may be the cause.

2.CHECK SUNLOAD SENSOR.

1) Disconnect the sunload sensor.

2) Short the connector.

3) Read the DTC using Subaru Select Monitor. Read Diagnostic Trouble Code (DTC)">

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 LOW/OPEN">Go to Step 3.

3.CHECK HARNESS.

1) Restore the temporary shorted lines made in step 2.

2) Turn the ignition switch to ON.

3) 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 LOW/OPEN">Go to Step 4.

Repair or replace the open circuit of the harness.

4.CHECK HARNESS (OPEN CIRCUIT).

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. 2 — (i88) No. 16:

Is there continuity?

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

Repair or replace the open circuit of harness.

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