P0325

Component Description
The knock sensor is attached to the cylinder block. It senses engine knocking using a piezoelectric element. A knocking vibration from the cylinder block is sensed as vibrational pressure. This pressure is converted into a voltage signal and sent to the ECM.
Freeze frame data will not be stored in the ECM for the knock sensor. The MIL will not light for knock sensor malfunction. The knock sensor has one trip detection logic.




ECM Terminals and Reference Value
Specification data are reference values and are measured between each terminal and 32 (ECM ground).




On Board Diagnostic Logic




DTC Confirmation Procedure

NOTE: If "DTC Confirmation Procedure" has been previously conducted, always turn ignition switch "OFF" and wait at least 5 seconds before conducting the next test.

TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 10V. at idle.

With CONSULT
1. Turn ignition switch "ON" and select "DATA MONITOR" mode with CONSULT.
2. Start engine and run it for at least 5 seconds at idle speed.
3. If DTC is detected, go to "Diagnostic Procedure" below.

With GST
1. Start engine and run it for at least 5 seconds at idle speed.
2. Select "MODE 3" with GST.
3. If DTC is detected, go to "Diagnostic Procedure" below.

Without Scan Tool
1. Start engine and run it for at least 5 seconds at idle speed.
2. Turn ignition switch "OFF", wait at least 5 seconds and then turn "ON".
3. Perform "Diagnostic Test Mode II" (Self-diagnostic results) with ECM.
4. If DTC is detected, go to "Diagnostic Procedure" below.

Wiring Diagram

EC-KS-01:

EC-KS-01 Connectors View:

Diagnostic Procedure

Step 1:

Step 2:

Step 3:

Step 4:

Step 5:

Step 6:

Step 7:

Step 8:

1mComponent Inspection




KNOCK SENSOR
- Use an ohmmeter which can measure more than 10 M (ohms).
1. Disconnect knock sensor harness connector.
2. Check resistance between terminal 2 and ground.

Resistance: 500 - 620 K Ohms [at 25°C (77°F)]

CAUTION: Do not use any knock sensors that have been dropped or physically damaged. Use only new ones.