Engine Electrical System

Diagnostic trouble code: P0325 “Malfunction in circuit of knock sensor”
Item
No.
Operation procedure
Inspection
results
Follow-up
procedure
1
Connect the diagnostic tester and adaptor,
and turn the ignition switch to “OFF”
position.
Proceed to next
step.
Yes
Proceed to next
step.
2
Disconnect the connector of knock sensor
on the wiring harness, inspect with
multimeter to verify that the resistance
between 1# pin and 2# pin of this sensor
is higher than 1MΩ.
No Replace the sensor.
Yes
Repair or replace
the wiring harness.
3
Verify that the circuits between 1# and 2#
pin of the knock sensor connector and
19# and 20# pins of ECU are open, or are
short to ground or power supply.
No
Proceed to next
step.
Yes
Refer to diagnosis
help.
4
Replace the knock sensor complying with
the operation instructions, trial run and
make the rotary speed of engine exceed
2200 rpm. Verify that the diagnostic code
of P0325 appears again.
No
Verify that it is a
random
malfunction.
E-39
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