DTC B1606 Refrigerant Flow Sensor Circuit Short: Wiring Diagram

Air Conditioning System. See appropriate SYSTEM WIRING DIAGRAM article.

Fig 1: Refrigerant Flow Sensor - Wiring Diagram

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Courtesy of SUBARU OF AMERICA, INC.

DIAGNOSTIC PROCEDURE

Step	Check	Yes	No
1 CHECK CONNECTOR. Check the condition of connector connection. Read the DTC using Subaru Select Monitor.	Is B1606 displayed?	Go to step 2 .	Check the connection of the refrigerant pressure sensor circuit.
2 CHECK REFRIGERANT PRESSURE SENSOR. Disconnect the refrigerant pressure sensor. Read the DTC of the A/C ECM using the Subaru Select Monitor.	Is B1605 displayed?	Replace the refrigerant pressure sensor. Refer to REMOVAL .	Go to step 3 .
3 CHECK HARNESS. Disconnect the connector from A/C CM. Using a tester, check continuity between terminals. Connector & terminal (B505) No. 1 - No. 2: (B505) No. 2 - Chassis ground:	Is there continuity?	Repair or replace the short circuit of the harness.	Replace the A/C CM. Refer to REMOVAL .