Subaru IMPREZA 2002 Service Manual page 392

I
DIAGNOSTICS FOR ENGINE STARTING FAILURE
ENGINE (DIAGNOSTICS)
Step
6
CHECK HARNESS BETWEEN ECM AND IG-
NlTlON COIL & IGNITOR ASSEMBLY CON-
NECTOR.
1)Turn the ignition switch to OFF.
2)Disconnect the connector from ECM.
3)Disconnect the connector from ignition coil &
ignitor assembly.
4)Measure the resistance of harness between
ECM and ignition coil & ignitor assembly con-
nector.
Connector & terminal
(8134) NO. 25
-
(E12) NO. 1:
9 CHECK HARNESS BETWEEN ECM AND IG-
NlTlON COIL & IGNITOR ASSEMBLY CON-
NECTOR.
Measure the resistance of harness between
ECM and ignition coil & ignitor assembly con-
nector.
Connector & terminal
(8134) NO. 26
-
(E12) NO. 4:
10 CHECK HARNESS BETWEEN ECM AND IG-
NlTlON COIL & IGNITOR ASSEMBLY CON-
NECTOR.
Measure the resistance of harness between
ECM and engine ground.
Connector & terminal:
(8134) No. 25
-
Engine ground:
11 CHECK HARNESS BETWEEN ECM AND IG-
NlTlON COIL & IGNITOR ASSEMBLY CON-
N ECTOR.
Measure the resistance of harness between
ECM and engine ground.
Connector & terminal
(8134) No. 26
-
Engine ground:
Check poor contact in ECM connector.
12 CHECK POOR CONTACT.
Check
Is the resistance less than 1
R?
Is the resistance less than 1
R?
Is the resistance more than
1
MR?
Is the resistance more than
1
MR?
Is there poor contact in ECM
Zonnector?
Yes
; o to step 9.
; o to step 10.
; o to step 11.
; o to step 12.
3epair poor con-
3ct in ECM con-
lector.
No
Repair harness
and connector.
NOTE:
In this case, repa
the following:
Open circuit in
harness between
ECM and ignition
coil & ignitor
assembly connec-
tor
Poor contact in
coupling connecto
(822)
Repair harness
and connector.
NOTE:
In this case, repai
the following:
Open circuit in
harness between
ECM and ignition
coil & ignitor
assembly connec-
tor
Poor contact in
coupling connecto
Repair ground
short circuit in har
ness between
ECM and ignition
coil & ignitor
assembly connec-
tor.
Repair ground
short circuit in har
ness between
ECM and ignition
coil & ignitor
assembly connec-
tor.
Check fuel pump
circuit. <Ref. to
(822)
EN(S0HC)-70,
FUEL PUMP CIR-
CUIT, Diagnostics
for Engine Start-
inq Failure.>
EN(S0HC)-68