DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
I
ENGINE
(DIAGNOSTICS)
Step
CHECK HARNESS BETWEEN KNOCK SEN-
SOR
AND ECM CONNECTOR.
Measure the resistance of harness between
ECM connector and chassis ground.
Connector
&
terminal
(8135)
No.
4
-
Chassis ground:
!
CHECK KNOCK SENSOR.
1)Disconnect the connector from knock sensor.
Check
Is
the resistance less than
400
kR?
Is
the resistance less than
400
kR?
I
CHECK INPUT SIGNAL
FOR
ECM.
1)Connect the connectors to ECM and knock
sensor.
2)Turn the ignition switch to ON.
3)Measure the voltage between ECM and
chassis ground.
Connector
&
terminal
(6135)
No.
4
(+)
-
Chassis ground
(-):
Replace the knock
sensor. <Ref. to
FU(D0HC
Knock Sensor.>
TURBO)-32,
Even
if
MIL lights
up, the circuit has
returned to a nor-
s
the voltage more than 2
V?
Repair ground
short circuit in har
ness between
knock sensor con-
nector and ECM
connector.
NOTE:
The harness be
tween both con
nectors
i!
shielded. Repai
short circuit
of
har
ness together witt
shield.
Repair poor con-
tact in ECM con-
nector.
EN(D0HC TURBO)-185
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