Subaru Legacy BN/BS (2015-2019) Service Manual: Dtc p059f active grille air shutter "a" performance/stuck off

Subaru Legacy BN/BS (2015-2019) Service Manual / Engine (diagnostics)(h4do) / Diagnostic procedure with diagnostic trouble code (dtc) / Dtc p059f active grille air shutter "a" performance/stuck off

DTC DETECTING CONDITION:

Detected when two consecutive driving cycles with fault occur.

CAUTION:

After servicing or replacing faulty parts, perform Clear Memory Mode Clear Memory Mode > OPERATION, and Inspection Mode Inspection Mode > PROCEDURE.

STEP	CHECK	YES	NO
1.CHECK DTC. Check for DTC. Read Diagnostic Trouble Code (DTC)	Is P059F displayed in «Present fault»-	Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC P059F ACTIVE GRILLE AIR SHUTTER "A" PERFORMANCE/STUCK OFF	Even if DTC is detected, it has returned to a normal condition at this time. Reproduce the failure, and then perform the diagnosis again. NOTE: In this case, it is assumed that the active grille shutter may have temporarily had a foreign matter adhered/pinched or a frost.
2.CHECK ACTIVE GRILLE SHUTTER. Check the area around the active grille shutter louver, louver link and actuator.	Is there any abnormality such as a foreign matter adhered or pinched and a frost-	Remove the foreign matter from the active grille shutter and go to the next step. Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC P059F ACTIVE GRILLE AIR SHUTTER "A" PERFORMANCE/STUCK OFF	Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC P059F ACTIVE GRILLE AIR SHUTTER "A" PERFORMANCE/STUCK OFF
3.CHECK ACTIVE GRILLE SHUTTER. 1) Turn the ignition switch to ON (engine OFF). 2) Using the Subaru Select Monitor, perform the operation check of the active grille shutter to measure time needed for open or close operation. NOTE: For detailed operation procedures, refer to the “Active Test”. Active Test	Is the time less than 15 seconds-	Even if DTC is detected, it has returned to a normal condition at this time. Reproduce the failure, and then perform the diagnosis again.	Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC P059F ACTIVE GRILLE AIR SHUTTER "A" PERFORMANCE/STUCK OFF
4.CHECK CURRENT DATA. Read the value of «Active Grille Shutter Voltage Error Status» using Subaru Select Monitor. NOTE: For detailed operation procedures, refer to “Current Data Display For Engine”. Subaru Select Monitor	Is «Normal» displayed-	Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC P059F ACTIVE GRILLE AIR SHUTTER "A" PERFORMANCE/STUCK OFF	Check the power supply circuit. If the power supply circuit is normal. replace the active grille shutter. Active Grille Shutter
5.CHECK CURRENT DATA. 1) Turn the ignition switch to OFF, and cool down the engine enough. NOTE: Cool down the engine unit until it can be easily touched by hand. 2) Turn the ignition switch to ON. 3) Read the value of «Active Grille Shutter Temperature Error Status» using Subaru Select Monitor. NOTE: For detailed operation procedures, refer to “Current Data Display For Engine”. Subaru Select Monitor	Is «Normal» displayed-	Even if DTC is detected, it has returned to a normal condition at this time. Reproduce the failure, and then perform the diagnosis again.	Replace the active grille shutter. Active Grille Shutter

1. OUTLINE OF DIAGNOSIS

Detect the malfunction of the response to open/close request for the active grille shutter.

Judge as NG if out of specification.

2. COMPONENT DESCRIPTION

(1)	Active grille shutter	(3)	Resistance value (k-)	(4)	Ambient air temperature (°C (°F))
(2)	Ambient sensor

3. EXECUTION CONDITION

Secondary Parameters	Execution condition
Battery voltage	≥ 10.9 V
Active grille shutter drive	Yes

4. GENERAL DRIVING CYCLE

Always perform the diagnosis continuously.

5. DIAGNOSTIC METHOD

Judge as NG when the following conditions are established.

Judgment Value

Malfunction Criteria	Threshold Value
Changing rate of the active grille shutter in 15000 ms	< 94%

Time Needed for Diagnosis: 15000 ms

Malfunction Indicator Light Illumination: Illuminates when malfunction occurs in 2 continuous driving cycles.

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