DTC P0328: Knock Sensor Circuit High

CIRCUIT OPERATION

The knock sensor (terminal No. 2) sends a signal voltage to the ECM (terminal No. 25).
The ground terminal (terminal No. 1) is grounded with ECM (terminal No. 42).

TECHNICAL DESCRIPTION

The knock sensor converts the vibration of the cylinder block into a voltage and outputs it.
The ECM checks whether the voltage is within a specified range.

DESCRIPTIONS OF MONITOR METHODS

MONITOR EXECUTION

MONITOR EXECUTIONS (Other monitor and Sensor)

Other Monitor (There is no temporary DTC stored in memory for the item monitored below)

Not applicable

Sensor (The sensor below is determined to be normal)

Not applicable

DTC SET CONDITIONS

Logic Flow Chart

Check Condition

2 seconds or more have passed since the engine starting sequence was completed.

Judgement Criterion

Knock sensor output voltage has continued to be higher than 2.3 volts for 2 seconds.

OBD-II DRIVE CYCLE PATTERN

Refer to Diagnostic Function - OBD-II Drive Cycle - Pattern 23

TROUBLESHOOTING HINTS (The most likely causes for this code to be set are:)

Shorted knock sensor circuit or connector damage.
ECM failed.

DIAGNOSIS

STEP 1. Check harness connector B-116 at the knock sensor and harness connector B-108 at ECM for damage.

Q. Is the harness connector in good condition?

	Go to Step 2.

	Repair or replace it. Refer to GROUP 00E, Harness Connector Inspection . Then go to Step 3.

STEP 2. Check for short circuit to power supply between knock sensor connector B-116 (terminal No. 2) and ECM connector B-108 (terminal No. 25).

note

Check harness after checking intermediate connector B-16. If intermediate connector is damaged, repair or replace it. Refer to GROUP 00E, Harness Connector Inspection

. Then go to Step 3.

Q. Is the harness wire in good condition?

	Replace the ECM. When the ECM is replaced, register the ID code. Refer to GROUP 42B, Diagnosis - ID Code Registration Judgment Table <Vehicles with KOS> or GROUP 42C, Diagnosis - ID Codes Registration Judgment Table <Vehicles with WCM> . Then go to Step 3.

	Repair it. Then go to Step 3.

STEP 3. Test the OBD-II drive cycle.

(1)Carry out a test drive with the drive cycle pattern. Refer to Diagnostic Function - OBD-II Drive Cycle - Pattern 23

(2)Check the diagnostic trouble code (DTC).

Q. Is DTC P0328 set?

	Retry the troubleshooting.

	The inspection is complete.