Subaru Legacy BN/BS (2015-2019) Service Manual: Dtc p059a active grille air shutter "a" position sensor circuit

Subaru Legacy BN/BS (2015-2019) Service Manual / Engine (diagnostics)(h4do) / Diagnostic procedure with diagnostic trouble code (dtc) / Dtc p059a active grille air shutter "a" position sensor circuit

DTC DETECTING CONDITION:

Immediately at fault recognition

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 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 P059A ACTIVE GRILLE AIR SHUTTER "A" POSITION SENSOR CIRCUIT	Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC P059A ACTIVE GRILLE AIR SHUTTER "A" POSITION SENSOR CIRCUIT
2.CHECK ACTIVE GRILLE SHUTTER. 1) Turn the ignition switch to OFF, and wait for approx. 30 seconds. 2) Turn the ignition switch to ON. NOTE: Make sure that the ambient temperature is equal to or higher than 3°C (37.4°F). 3) Start the engine. 4) Three minutes after starting the engine, perform the operation check for the active grille shutter using the Subaru Select Monitor. NOTE: For detailed operation procedures, refer to the “Active Test”. Active Test	Does the open/close operation finish correctly-	Even if DTC is detected, it has returned to a normal condition at this time. NOTE: In this case, it is assumed that the active grille shutter may have temporarily had a foreign matter adhered/pinched or a frost.	Replace the active grille shutter. Active Grille Shutter

1. OUTLINE OF DIAGNOSIS

Detect the malfunction of active grille shutter position sensor.

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
Command to active grille shutter	Open or Closed

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
Input pulse of the active grille shutter position sensor	= 0

Time Needed for Diagnosis: 2500 ms

Malfunction Indicator Light Illumination: Illuminates as soon as a malfunction occurs.

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