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DTC P0328 KNOCK SENSOR 1 CIRCUIT HIGH INPUT (BANK 1 OR SINGLE SENSOR)

DTC P0328 KNOCK SENSOR 1 CIRCUIT HIGH INPUT (BANK 1 OR SINGLE SENSOR)

DTC DETECTING CONDITION:


• Immediately at fault recognition

• GENERAL DESCRIPTION


TROUBLE SYMPTOM:


• Poor driving performance

• Knocking occurs.


Important

After repair or replacement of faulty parts, conduct Clear Memory Mode and Inspection Mode .


WIRING DIAGRAM:


CHECK HARNESS BETWEEN KNOCK SENSOR AND ECM CONNECTOR.

Measure the resistance of harness between ECM connector and chassis ground.

Connector & terminal

(B136) No. 25 — Chassis ground:

Is the resistance less than 400 kΩ?

Yes


No


CHECK KNOCK SENSOR.

Disconnect the connector from knock sensor.

Measure the resistance between knock sensor connector terminal and engine ground.

Terminals

No. 2 — Engine ground:

Is the resistance less than 400 kΩ?

Yes

Replace the knock sensor.


No

• Repair ground short circuit in harness between knock sensor connector and ECM connector.

•
Note

The harness between both connectors is shielded. Repair short circuit of harness together with shield.



CHECK INPUT SIGNAL FOR ECM.

Connect the connectors to ECM and knock sensor.

Turn the ignition switch to ON.

Measure the voltage between ECM and chassis ground.

Connector & terminal

(B136) No. 25 (+) — Chassis ground (−):

Is the voltage more than 2 V?

Yes

• Even if malfunction indicator light lights up, the circuit has returned to a normal condition at this time. (However, the possibility of poor contact still remains.)

•
Note

In this case, repair the following:

• Poor contact in knock sensor connector

• Poor contact in ECM connector

• Poor contact in coupling connector



No

Repair poor contact in ECM connector.