Subaru Legacy BN/BS (2015-2019) Service Manual: Dtc p0328 knock/combustion vibration sensor 1 circuit high bank 1 or single sensor

Subaru Legacy BN/BS (2015-2019) Service Manual / Engine (diagnostics)(h4do) / Diagnostic procedure with diagnostic trouble code (dtc) / Dtc p0328 knock/combustion vibration sensor 1 circuit high bank 1 or single sensor

DTC DETECTING CONDITION:

Immediately at fault recognition

TROUBLE SYMPTOM:

• Poor driving performance

• Knocking occurs

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 HARNESS BETWEEN ECM AND KNOCK SENSOR CONNECTOR. 1) Turn the ignition switch to OFF. 2) Disconnect the connector from ECM. 3) Measure the resistance between ECM connectors. Connector & terminal (E158) No. 30 — (E158) No. 34:	Is the resistance 600 k- or more-	Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC P0328 KNOCK/COMBUSTION VIBRATION SENSOR 1 CIRCUIT HIGH BANK 1 OR SINGLE SENSOR	Repair the poor contact of ECM connector.
2.CHECK KNOCK SENSOR. 1) Disconnect the connector from the knock sensor. 2) Measure the resistance between knock sensor terminals. Terminals No. 1 — No. 2:	Is the resistance 600 k- or more-	Replace the knock sensor. Knock Sensor	Repair the harness and connector. NOTE: In this case, repair the following item: • Open circuit in harness between ECM connector and knock sensor connector • Poor contact of knock sensor connector • Poor contact of coupling connector

1. OUTLINE OF DIAGNOSIS

Detect the open or short circuit of knock sensor.

Judge as NG if out of specification.

2. COMPONENT DESCRIPTION

(A)	To knock sensor harness

(1)	Case	(3)	Piezoelectric element	(5)	Resistance
(2)	Weight	(4)	Nut

3. EXECUTION CONDITION

Secondary Parameters	Execution condition
None

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
Output voltage	≥ 4.591 V

Time Needed for Diagnosis: 1000 ms

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

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Dtc p0327 knock/combustion vibration sensor 1 circuit low bank 1 or single sensor

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Other materials:

Clear memory mode operation
1. On «Start» display, select «Diagnosis».2. On «Vehicle selection» display, input the target vehicle information and select «Confirmed».3. On «Main Menu» display, select «Each System».4. On «Select System» display, select «Subaru Rear Vehicle Detection(RH)» or «Subaru Rear Vehicle ...