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SEF332I
Component Description
NGEC0711
The knock sensor is attached to the cylinder block. It senses
engine knocking using a piezoelectric element.Aknocking 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
NGEC0712
Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECM’s transistor. Use a ground other than the ECM terminals, such as the ground.
TERMI-
NAL
NO.
WIRE
COLOR
ITEM CONDITION DATA (DC Voltage)
64 W Knock sensor
[Engine is running]
쐌 Idle speed
Approximately 2.5V
On Board Diagnosis Logic
NGEC0713
Malfunction is detected when an excessively low or high voltage
from the knock sensor is sent to ECM.
POSSIBLE CAUSE
NGEC0713S01
쐌 Harness or connectors
(The knock sensor circuit is open or shorted.)
쐌 Knock sensor
SEF059Y
DTC Confirmation Procedure
NGEC0714
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 bat-
tery voltage is more than 10V at idle.
With CONSULT-II
1) Turn ignition switch ON and select “DATA MONITOR” mode
with CONSULT-II.
2) Start engine and run it for at least 5 seconds at idle speed.
3) If DTC is detected, go to “Diagnostic Procedure”, EC-938.
With GST
Follow the procedure “With CONSULT-II”.
DTC P0325 KNOCK SENSOR (KS)
VG33E
Component Description
EC-936
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