DTC B1635 Out Side Temperature Sensor Circuit Abnormality (Air Conditioner): Wiring Diagram

Air Conditioning System. See appropriate SYSTEM WIRING DIAGRAM article.

Fig 1: Outside Temperature Sensor - Wiring Diagram

G08348790

Courtesy of SUBARU OF AMERICA, INC.

DIAGNOSTIC PROCEDURE

Step	Check	Yes	No
1 CHECK FOR POOR CONTACT. Check the A/C CM connector (i80) for poor contact.	Is there poor contact of connector?	Repair the connector.	Go to step 2 .
2 CHECK DTC. Connect the disconnected connectors. Turn the ignition switch to ON. Read the DTC of the CAN system using the Subaru Select Monitor.	Is DTC displayed?	Perform the diagnosis according to the DTC. Refer to LIST OF DIAGNOSTIC TROUBLE CODE (DTC) .	Go to step 3 .
3 CHECK CAN COMMUNICATION CIRCUIT. Check the CAN communication circuit. Refer to CAN COMMUNICATION CIRCUIT CHECK .	Is the CAN communication circuit normal?	Go to step 4 .	Repair the CAN communication circuit. Refer to LAN SYSTEM .
4 CHECK INPUT SIGNAL FOR AMBIENT SENSOR. Turn the ignition switch to ON. Measure the voltage between terminals of ambient sensor connector (F138). Disconnect the connector. Connector & terminal (B480) No. 2 (+) - No. 1 (-):	Is the voltage approx. 5 V?	Go to step 5 .	Check the ambient sensor. Refer to INSPECTION .
5 CHECK COMBINATION METER OUTPUT SIGNAL. Turn the ignition switch to OFF. Pull out the combination meter. Disconnect the ambient sensor connector (F138). Turn the ignition switch to ON. Measure the voltage between terminals of combination meter connector (i10). Connector & terminal (i10) No. 36 (+) - No. 37 (-):	Is the voltage approx. 5 V?	Go to step 6 .	Check the combination meter. Refer to COMBINATION METER SYSTEM .
6 CHECK HARNESS CONNECTOR BETWEEN COMBINATION METER AND AMBIENT SENSOR. Turn the ignition switch to OFF. Disconnect the combination meter connector (i10). Measure the resistance of harness between combination meter connector (i10) and ambient sensor connector (B480). Connector & terminal (B480) No. 2 - (i10) No. 36: (B480) No. 1 - (i10) No. 37:	Is the resistance less than 1 Ω?	Ambient sensor circuit is normal.	Repair the open circuit of the harness between the combination meter and ambient sensor.