Subaru Legacy BN/BS (2015-2019) Service Manual: Dtc p0335 crankshaft position sensor "a" circuit

Subaru Legacy BN/BS (2015-2019) Service Manual / Engine (diagnostics)(h4do) / Diagnostic procedure with diagnostic trouble code (dtc) / Dtc p0335 crankshaft position sensor "a" circuit

DTC DETECTING CONDITION:

Immediately at fault recognition

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.

WIRING DIAGRAM:

• Engine Electrical System ENGINE TYPE FB (WITHOUT PUSH BUTTON START) Engine Electrical System > WIRING DIAGRAM

• Engine Electrical System ENGINE TYPE FB (WITH PUSH BUTTON START) Engine Electrical System > WIRING DIAGRAM

STEP	CHECK	YES	NO
1.CHECK INSTALLATION CONDITION OF CRANKSHAFT POSITION SENSOR.	Is the crankshaft position sensor installation bolt tightened securely-	Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC P0335 CRANKSHAFT POSITION SENSOR "A" CIRCUIT	Tighten the crankshaft position sensor installation bolt securely. Crankshaft Position Sensor > INSTALLATION
2.CHECK CRANKSHAFT POSITION SENSOR. 1) Turn the ignition switch to OFF. 2) Remove the crankshaft position sensor. 3) Measure the resistance between terminals of crankshaft position sensor. Terminals No. 1 — No. 2:	Is the resistance between 1 and 4 k--	Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC P0335 CRANKSHAFT POSITION SENSOR "A" CIRCUIT	Replace the crankshaft position sensor. Crankshaft Position Sensor
3.CHECK HARNESS BETWEEN ECM AND CRANKSHAFT POSITION SENSOR CONNECTOR. 1) Disconnect the connector from ECM. 2) Measure the resistance of harness between ECM connector and crankshaft position sensor connector. Connector & terminal (E158) No. 40 — (E10) No. 1: (E158) No. 27 — (E10) No. 2:	Is the resistance less than 1 --	Repair the poor contact of ECM and crankshaft position sensor connector.	Repair the harness and connector. NOTE: In this case, repair the following item: • Open circuit in harness between ECM connector and crankshaft position sensor connector • Poor contact of coupling connector

1. OUTLINE OF DIAGNOSIS

Detect the open or short circuit of the crankshaft position sensor.

Judge as NG when the crank signal is not input even though the starter was rotated.

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

If the duration of time while the following conditions are met is longer than the time indicated, judge as NG.

Judgment Value

Malfunction Criteria	Threshold Value
Number of crankshaft position sensor signals during cranking	= 0

Time Needed for Diagnosis: 3000 ms

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

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