P22425
Knock Sensor 1
KNK2
Knock Sensor 2
KNK1
ECM
E1
E1
E5
E5
6
14
B
L
−
W
(On front side)
1
(On rear side)
1
−
DIAGNOSTICS
ENGINE
DI
−
59
1996 LAND CRUISER (RM451U)
DTC
P0325
Knock Sensor 1 Circuit Malfunction
DTC
P0330
Knock Sensor 2 Circuit Malfunction
CIRCUIT DESCRIPTION
Knock sensors are fitted one each to the front and rear of the left side of the cylinder block to detect engine
knocking. This sensor contains a piezoelectric element which generates a voltage when it becomes de-
formed, which occurs when the cylinder block vibrates due to knocking. If engine knocking occurs, ignition
timing is retarded to suppress it.
DTC No.
DTC Detecting Condition
Trouble Area
P0325
No knock sensor 1 signal to ECM with engine speed, between
1,800 rpm and 5.200 rpm
S
Open or short in knock sensor 1 circuit
S
Knock sensor 1 (looseness)
S
ECM
P0330
No knock sensor 2 signal to ECM with engine speed, between
1,800 rpm and 5.200 rpm
S
Open or short in knock sensor 2 circuit
S
Knock sensor 2 (looseness)
S
ECM
If the ECM detects the above DTCs, it operates the fail safe function in which the corrective retard angle value
is set to the maximum value.
WIRING DIAGRAM
DI5PG
−
02
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Brought to you by BirfMark
Version 1.00 - 12/21/2010