Subaru Legacy BN/BS (2015-2019) Service Manual: Dtc b14a2 sunload sensor circuit short-circuit

Subaru Legacy BN/BS (2015-2019) Service Manual / Hvac system (diagnostics) / Diagnostic procedure with diagnostic trouble code (dtc) / Dtc b14a2 sunload sensor circuit short-circuit

DTC DETECTING CONDITION:

Short circuit in the sunload sensor is detected for 3 seconds or more.

TROUBLE SYMPTOM:

Operation is performed as no sunload.

WIRING DIAGRAM:

Air conditioning system Air Conditioning System > WIRING DIAGRAM

STEP	CHECK	YES	NO
1.CHECK CONNECTOR. 1) Check connecting condition of the A/C CM connector and sunload sensor connector. 2) Read the DTC using Subaru Select Monitor. Read Diagnostic Trouble Code (DTC)	Is B14A2 displayed-	Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B14A2 SUNLOAD SENSOR CIRCUIT SHORT-CIRCUIT	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) Read the DTC using Subaru Select Monitor. Read Diagnostic Trouble Code (DTC)	Is B14A1 displayed-	Replace the sunload sensor. Sunload Sensor (Auto A/C Model) > REMOVAL	Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B14A2 SUNLOAD SENSOR CIRCUIT SHORT-CIRCUIT
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-	Check the connection of the sunload sensor circuit.	Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B14A2 SUNLOAD SENSOR CIRCUIT SHORT-CIRCUIT
4.CHECK HARNESS (SHORTED BETWEEN LINES). 1) Disconnect the connector from A/C CM. 2) Using a tester, check continuity between terminals. Connector & terminal (i51) No. 1 — No. 2:	Is there continuity-	Repair or replace the short circuit of the harness.	Replace the A/C CM. Control Unit > REMOVAL

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Other materials:

General diagnostic table inspection
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