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Subaru Legacy Service Manual: Dtc p0014 "b" camshaft position - timing over-advanced or system performance bank 1

Subaru Legacy Service Manual / Engine (diagnostics)(h6do) / Diagnostic procedure with diagnostic trouble code (dtc) / Dtc p0014 "b" camshaft position - timing over-advanced or system performance bank 1

DTC DETECTING CONDITION:

Detected when two consecutive driving cycles with fault occur.

TROUBLE SYMPTOM:

Engine stalls.

Improper idling

CAUTION:

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

STEPCHECKYESNO

1.IDENTIFYING FAULTY PART.

1) Perform the Clear Memory Mode. Clear Memory Mode

2) Replace the defective oil control solenoid by the other (RH or LH, intake side or exhaust side) oil control solenoid.

3) Perform appropriate drive cycle. Drive Cycle

4) Make sure that the fault occurrence (DTC and incorrect advancing) has shifted to the other location.

Did the detected DTC shift to the location where the oil control solenoid was replaced-

Replace the faulty oil control solenoid.

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC P0014 "B" CAMSHAFT POSITION - TIMING OVER-ADVANCED OR SYSTEM PERFORMANCE BANK 1

2.CHECK CURRENT DATA.

1) Start the engine and let it idle.

2) Read the value of «Exh. VVT Retard Ang. R» using the Subaru Select Monitor.

NOTE:

For detailed operation procedures, refer to “Read Current Data For Engine”. Subaru Select Monitor

Is the value of «Exh. VVT Retard Ang. R» approx. 0 deg-

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC P0014 "B" CAMSHAFT POSITION - TIMING OVER-ADVANCED OR SYSTEM PERFORMANCE BANK 1

Check the following item and repair or replace if necessary.

Oil pipe (clog)

Oil flow control solenoid valve (clog or dirt of oil routing, setting of spring)

Exhaust camshaft (dirt, damage of camshaft)

3.CHECK CURRENT DATA.

1) Drive with acceleration and deceleration at 80 km/h (50 MPH) or less.

NOTE:

Drive to an extent that the duty output of oil flow control solenoid valve increases.

2) Read the values of «Exh. OCV Duty R» and «Exh. VVT Retard Ang. R» using the Subaru Select Monitor.

NOTE:

For detailed operation procedures, refer to “Read Current Data For Engine”. Subaru Select Monitor

When the value of «Exh. OCV Duty R» increases more than 10%, is the value of «Exh. VVT Retard Ang. R» approx. 0 deg-

Check the following item and repair or replace if necessary.

Oil pipe (clog)

Oil flow control solenoid valve (clog or dirt of oil routing, setting of spring)

Exhaust camshaft (dirt, damage of camshaft)

Perform the following procedures, and clean the oil routing.

Replace the engine oil and idle the engine for 5 minutes, and then replace the oil filter and engine oil. Engine Oil > REPLACEMENT Engine Oil Filter

1. OUTLINE OF DIAGNOSIS

Detect the exhaust AVCS system malfunction.

Judge NG when the amount of exhaust AVCS actual timing advance does not approach the amount of exhaust AVCS target timing advance.

2. COMPONENT DESCRIPTION

(1)

Exhaust AVCS timing controller

(3)

Engine control module (ECM)

(5)

Hydraulic

(2)

Vane

(4)

Oil flow control solenoid valve

3. EXECUTION CONDITION

Secondary Parameters

Execution condition

Battery voltage

≥ 10.9 V

Exhaust AVCS control

Operation

Engine oil temperature

≥ 50 °C (122 °F)

4. GENERAL DRIVING CYCLE

Perform the diagnosis continuously while exhaust AVCS is operating.

5. DIAGNOSTIC METHOD

When the conditions during which the differences of exhaust AVCS target timing advance amount and exhaust AVCS actual timing advance amount is large continues for certain amount of time.

Judge as NG when the following conditions are established within the predetermined time.

Judgment Value

Malfunction Criteria

Threshold Value

(Target position − Actual position)

> 10 °CA

or

< −10 °CA

Time Needed for Diagnosis:

10000 ms

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

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