DTC B14A1: SUNLOAD Sensor Circuit Low/Open

WARNING: This page is about a different variant/trim than selected.

DTC detecting condition:

Open circuit in the sunload sensor is detected for 4 seconds or more. (Displayed for current malfunction)

Trouble symptom:

Operation is performed as no sunload.

Wiring diagram:

Air conditioning system Ref. to WIRING SYSTEM (CROSSTREK MODEL (HEV))>AIR CONDITIONING SYSTEM>WIRING DIAGRAM .

Courtesy of SUBARU OF AMERICA, INC.

CAUTION: Before performing diagnosis, refer to "CAUTION" in "General Description". Ref. to AIR CONDITIONER (DIAGNOSTICS) (HEV)>GENERAL DESCRIPTION>CAUTION .

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.

CHECK CONNECTOR .
1. Check connecting condition of the A/C control panel connector and sunload sensor connector.
2. Turn the ignition switch to ON.
3. Read the DTC of [Air Conditioner] using the Subaru Select Monitor. Ref. to AIR CONDITIONER (DIAGNOSTICS) (HEV)>DIAGNOSTIC TROUBLE CODE (DTC) .
Is DTC B14A1 displayed?

Yes : Go to 2.

No : 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.
CHECK SUNLOAD SENSOR .
1. Turn the ignition switch to OFF.
2. Disconnect the sunload sensor.
3. Short the connector i51.
4. Turn the ignition switch to ON.
5. Read the DTC of [Air Conditioner] using the Subaru Select Monitor. Ref. to AIR CONDITIONER (DIAGNOSTICS) (HEV)>DIAGNOSTIC TROUBLE CODE (DTC) .
Is DTC B14A2 displayed?

Yes : Replace the sunload sensor, Ref. to AIR CONDITIONER (HEV)>SUNLOAD SENSOR (AUTO A/C MODEL) .

No : Go to 3.
CHECK HARNESS .
1. Turn the ignition switch to OFF.
2. Restore the temporary shorted lines made in step 2.
3. Turn the ignition switch to ON.
4. Using a tester, measure the voltage between terminals in sunload sensor connector.
  Connector & terminal
  
  (i51) No. 1 (+) - No. 2 (-):
Is the voltage 4.5 - 5.5 V?

Yes : Go to 4.

No : Repair or replace the open circuit of harness.
CHECK HARNESS (OPEN CIRCUIT) .
1. Turn the ignition switch to OFF.
2. Disconnect the connector from the A/C control panel.
3. Using a tester, check the continuity between sunload sensor and A/C control panel connector terminals.
  Connector & terminal
  
  (i51) No. 1 - (i181) No. 7:
  
  (i51) No. 2 - (i80) No. 10:
Is there continuity?

Yes : Replace the A/C control panel. Ref. to AIR CONDITIONER (HEV)>CONTROL PANEL .

No : Repair or replace the open circuit of harness.