Subaru Legacy BN/BS (2015-2019) Service Manual: Diagnostics with phenomenon inspection

Subaru Legacy BN/BS (2015-2019) Service Manual / Hvac system (diagnostics) / Diagnostics with phenomenon inspection

(1) Perform diagnosis according to the diagnosis procedure for the corresponding symptom listed in the symptom table.

(2) If there are multiple symptoms, perform the diagnosis in the order of symptom number (1 > 2 > ... > 13).

1. SYMPTOM TABLE

Symptoms		Diagnosis procedure
1	Nothing is displayed on the screen or indicators do not illuminate.	Diagnostics with Phenomenon > DIAGNOSTIC PROCEDURE WITH PHENOMENON
2	Air conditioner does not stop even when the OFF switch is pressed. (vehicles with fully automatic air conditioner)	Diagnostics with Phenomenon > DIAGNOSTIC PROCEDURE WITH PHENOMENON
3	The windshield glass is not cleared even when the DEF switch is pressed. (vehicles with fully automatic air conditioner)	Diagnostics with Phenomenon > DIAGNOSTIC PROCEDURE WITH PHENOMENON
4	Cold air not emitted.	Diagnostics with Phenomenon > DIAGNOSTIC PROCEDURE WITH PHENOMENON
5	Warm air not emitted.	Diagnostics with Phenomenon > DIAGNOSTIC PROCEDURE WITH PHENOMENON
6	Compartment temperature is excessively lower than setting temperature.	Diagnostics with Phenomenon > DIAGNOSTIC PROCEDURE WITH PHENOMENON
7	Compartment temperature is excessively higher than setting temperature.	Diagnostics with Phenomenon > DIAGNOSTIC PROCEDURE WITH PHENOMENON
8	Air does not come out, or airflow capacity is insufficient. (Blower motor does not rotate.)	Diagnostics with Phenomenon > DIAGNOSTIC PROCEDURE WITH PHENOMENON
9	Air goes out of control. (Blower motor rotates at high speed.)	Diagnostics with Phenomenon > DIAGNOSTIC PROCEDURE WITH PHENOMENON
10	Cold air does not come out even when the A/C switch is pressed. The glass cannot be defogged. (Compressor does not operate. (variable))	Diagnostics with Phenomenon > DIAGNOSTIC PROCEDURE WITH PHENOMENON
11	Unable to switch suction vents.	Diagnostics with Phenomenon > DIAGNOSTIC PROCEDURE WITH PHENOMENON
12	Unable to switch blow vents.	Diagnostics with Phenomenon > DIAGNOSTIC PROCEDURE WITH PHENOMENON
13	Illumination does not come on, or cannot dim.	Diagnostics with Phenomenon > DIAGNOSTIC PROCEDURE WITH PHENOMENON

Diagnostic procedure for subaru select monitor communication communication for initializing impossible

DIAGNOSIS:Defective CAN communication circuitTROUBLE SYMPTOM:• LAN system is abnormal.• Communication failure between Subaru Select Monitor and A/C CMWIRING DIAGRAM:NOTE:For the coupling c ...

Electrical component location location

1. ENGINE COMPARTMENT(1)Pressure sensor(2)A/C compressor(Refrigerant flow sensor, variable flow change solenoid)(3)Ambient sensor2. PASSENGER COMPARTMENT(1)Evaporator sensor(5)Sunload sensor(9)A/C con ...

Other materials:

Inspection
STEPCHECKYESNO1.CHECK SOLENOID UNIT.Measure the resistance of solenoid unit connector terminals.TerminalsNo. 4 — No. 3:Is the resistance 27.6 — 30.5 -- AT Shift Lock Solenoid and “P” Range Switch > INSPECTIONReplace the solenoid unit. AT Shift Lock Solenoid and “P” Range ...