Knock Sensor 1 Circuit Malfunction - Toyota T100 1996 Service Manual

DTC P0325
CIRCUIT DESCRIPTION
Knock sensor is 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.
No knock sensor 1 signal to ECM with engine speed 1,200 rpm
P0325
or more
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
1996 TOYOTA T100 (RM449U)
DIAGNOSTICS

Knock Sensor 1 Circuit Malfunction

DTC Detecting Condition
Knock Sensor 1
1
− ENGINE (3RZ−FE)
S Open or short in knock sensor 1 circuit
S Knock sensor 1 (looseness)
S ECM
13
B
E6 E6
(M/T) (A/T)
Trouble Area
ECM
6
KNK
E1
DI−63
DI0TQ−03
P19613