Toyota Camry Manual page 1310

DTC P0325
DTC P0330
CIRCUIT DESCRIPTION
Knock sensors are fitted one to the right bank and left bank of the cylinder block to detect engine knocking.
This sensor contains a piezoelectric element which generates a voltage when it becomes deformed, which
occurs when the cylinder block vibrates due to knocking. If engine knocking occurs, ignition timing is retarded
to suppress it.
DTC No.
No knock sensor 1 signal to ECM with engine speed between
P0325
2,000 rpm and 5,600 rpm.
No knock sensor 2 signal to ECM with engine speed between
P0330
2,000 rpm and 5,600 rpm.
If the ECM detects the above diagnosis conditions, it operates the fail–safe function in which the corrective
retard angle value is set to the maximum value.
WIRING DIAGRAM
DIAGNOSTICS
Knock Sensor 1 Circuit Malfunction
Knock Sensor 2 Circuit Malfunction
DTC Detecting Condition
Knock Sensor 1
(On right bank)
1 W
Knock Sensor 2
(On left bank)
1 W
– ENGINE (1MZ–FE)
D Open or short in knock sensor 1 circuit
D Knock sensor 1 (looseness)
D ECM
D Open or short in knock sensor 2 circuit
D Knock sensor 2 (looseness)
D ECM
1
27
W
EC1
E11
2
28
W
EC1 E11
Author :
Trouble Area
ECM
KNKR
E1
KNKL
E1
Date :
DI–283
DI07T–06
A03315
518