Subaru Legacy BN/BS (2015-2019) Service Manual: Dtc p0336 crankshaft position sensor "a" circuit range/performance

Subaru Legacy BN/BS (2015-2019) Service Manual / Engine (diagnostics)(h4do) / Diagnostic procedure with diagnostic trouble code (dtc) / Dtc p0336 crankshaft position sensor "a" circuit range/performance

DTC DETECTING CONDITION:

Detected when two consecutive driving cycles with fault occur.

TROUBLE SYMPTOM:

• Engine stalls.

• Failure of engine to start

CAUTION:

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

STEP

CHECK

YES

1.CHECK CONDITION OF CRANKSHAFT POSITION SENSOR.

Turn the ignition switch to OFF.

Is the crankshaft position sensor installation bolt tightened securely-

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC P0336 CRANKSHAFT POSITION SENSOR "A" CIRCUIT RANGE/PERFORMANCE

Tighten the crankshaft position sensor installation bolt securely. Crankshaft Position Sensor > INSTALLATION

2.CHECK CRANKSHAFT POSITION SENSOR PLATE.

Is there crack or damage in the crankshaft position sensor plate teeth-

Replace the crankshaft position sensor plate. Cylinder Block

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC P0336 CRANKSHAFT POSITION SENSOR "A" CIRCUIT RANGE/PERFORMANCE

3.CHECK INSTALLATION CONDITION OF TIMING CHAIN.

Turn the crankshaft, and align alignment mark on crank sprocket with alignment mark on cylinder block.

ST 18252AA000

CRANKSHAFT SOCKET

Is the timing chain dislocated from its proper position-

Correct the installation condition of timing chain. Timing Chain Assembly

Replace the crankshaft position sensor. Crankshaft Position Sensor

1. OUTLINE OF DIAGNOSIS

Detect for faults in crankshaft position sensor output properties.

Judge as NG when there is a problem in the number of crankshaft signals for every revolution of crankshaft.

2. COMPONENT DESCRIPTION

(A)

Camshaft signal (RH)

(B)

Camshaft signal (LH)

(C)

Crankshaft signal

(1)

Crankshaft position sensor

(2)

Crankshaft position sensor plate

(3)

One crankshaft rotation

3. EXECUTION CONDITION

Secondary Parameters	Execution condition
Battery voltage	≥ 8 V

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
The number of crankshaft position sensor signals in one crankshaft revolution during driving	≠ 30

Time Needed for Diagnosis: 10 engine revs engine revs.

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

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