A01859
Knock Sensor
Engine ECU
KNK
13
E5
GR
1
DI--134
--
DIAGNOSTICS
ENGINE (2RZ--FE, 3RZ--FE)
DTC P0325/52 Knock Sensor Circuit Malfunction
CIRCUIT DESCRIPTION
Knock sensor are fitted to 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 vi-
brates due to knocking. If engine knocking occurs, ignition timing is retarded to suppress it.
DTC No.
DTC Detecting Condition
Trouble Area
N k
k
1 i
l t
i
ECU ith
i
d
S
Open or short in knock sensor circuit
P0325/52
No knock sensor 1 signal to engine ECU with engine speed
between 1 700 rpm and 5 200 rpm
S
Open or short in knock sensor circuit
S
Knock sensor (looseness)
P0325/52
between 1,700 rpm and 5,200 rpm
Knock sensor (looseness)
S
Engine ECU
WIRING DIAGRAM
DI1IJ--01
CLICK HERE TO VIEW CHAPTER INDEX
Pages From Supplement
3RZ-F,3RZ-FE