Subaru 2002 IMPREZA Service Manual page 589

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
ENGINE (DIAGNOSTICS)
Yes
30 to step 2.
qepair battery
short circuit in har-
less between
ECM and TCM
:onnector. After
,epair, replace the
ECM. <Ref. to
FU(D0HC
TURBO)-47,
Engine Control
Module.>
I
No
Repair battery
short circuit in har-
ness between
ECM and TCM
connector. After
repair, replace the
ECM. <Ref. to
FU(D0HC
Engine Control
Module.>
Contact with SOA
(distributor) ser-
vice.
NOTE:
Inspection by DTM
is required, be-
cause probable
cause is deteriora.
tion of multiple
parts.
TURBO)-47,
Step
CHECK OUTPUT SIGNAL FROM ECM.
1)Start the engine, and warm-up the engine.
2)Turn the ignition switch to OFF.
3)Disconnect the connector from TCM.
4)Turn the ignition switch to ON.
5)Measure the voltage between ECM and
chassis ground.
Connector & terminal
(B 136) No. 14 (+)
-
Chassis ground ( - ) :
2
CHECK HARNESS BETWEEN ECM AND
TCM CONNECTOR.
1)Turn the ignition switch to OFF.
2)Measure the voltage between ECM and
chassis ground.
Connector & terminal
(B 136) No. 14 (+)
-
Chassis ground (-):
Check
Is the voltage less than 3 V?
Does the voltage change more
than 10 V by shaking harness
and connector of ECM while
monitoring the value with volt-
age meter?
EN(D0HC TURBO)-365