Subaru IMPREZA 2002 Service Manual page 651

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
ENGINE (DIAGNOSTICS)
short circuit in har-
ness between
ECM and TCM
connector.
Repair poor con-
tact in ECM con-
nector.
Go to step 5.
Step
CHECK INPUT SIGNAL FOR ECM.
1)Turn the ignition switch to ON.
2)Measure the voltage between ECM and
chassis ground.
Connector & terminal
(8135) No. 16 (+)
-
Chassis ground ( - ) :
CHECK INPUT SIGNAL FOR ECM.
Measure the voltage between ECM and chas-
sis ground.
Connector & terminal
CHECK POOR CONTACT.
Check poor contact in ECM connector.
(8135) No. 16 (+)
-
Chassis ground ( - ) :
Replace the ECM.
<Ref. to
Engine Control
Module.>
Repair open circuit
in harness
between ECM and
TCM connector.
FU( S0HC)-47,
CHECK HARNESS BETWEEN ECM AND
TCM CONNECTOR.
1)Turn the ignition switch to OFF.
2)Disconnect the connectors from ECM and
TCM.
3)Measure the resistance of harness between
ECM and TCM connector.
Connector & terminal
(B 135) NO. 16
-
(656) NO. 5:
CHECK HARNESS BETWEEN ECM AND
TCM CONNECTOR.
Measure the resistance of harness between
ECM and chassis ground.
Connector & terminal
(B 135) No. 16
-
Chassis ground:
CHECK POOR CONTACT.
Check poor contact in TCM connector.
Check
s the voltage more than 4.5 V?
Is the voltage more than 10 V?
Is
there poor contact in ECM
:onnector?
Is the resistance less than 1
n?
Is the resistance less than 10
n?
Is there poor contact in TCM
connector?
Repair battery
I
Go to step
3 .
short circuit in har-
ness between
ECM and TCM
connector.
nector. Transmission Con-
trol Module
( T C M b
EN(S0HC)-327