Subaru 2002 IMPREZA Service Manual page 289

DIAGNOSTICS FOR ENGINE STARTING FAILURE
ENGINE (DIAGNOSTICS)
Yes
30 to step
2.
3ecord the DTC.
3epair the trouble
:ase. <Ref. to
!N(DOHC
rURBO)-88, Diag-
iostic Procedure
Nith Diagnostic
rrouble Code
DTC) . >
30
to step
4.
Step
CHECK OPERATION OF STARTER MOTOR
No
Go to step 3.
Go to step 3.
Go to step 5.
CHECK DTC.
<Ref. to EN(D0HC TURBO)-45, OPERATION,
Read Diagnostic Trouble Code.>
)heck the starter
notor. <Ref. to
X - 6 , Starter.>
CHECK INPUT SIGNAL FOR STARTER MO-
TOR.
1)Turn the ignition switch to OFF.
2)Disconnect the connector from starter motor
3)Turn the ignition switch to ST.
4)Measure the power supply voltage between
starter motor connector terminal and engine
ground.
Connector & terminal
(814) No. 1 (+)
-
Engine ground (-):
CHECK GROUND CIRCUIT OF STARTER
MOTOR.
1)Turn the ignition switch to OFF.
2)Disconnect the terminal from starter motor.
3)Measure the resistance of ground cable
between ground cable terminal and engine
ground.
CHECK HARNESS BETWEEN ECM AND
STARTER MOTOR CIRCUIT.
1)Turn the ignition switch to OFF.
2)Measure the resistance between starter
motor and ECM.
.
Connector & terminal
(814) No. 1
-
Engine ground:
CHECK HARNESS BETWEEN ECM AND
STARTER MOTOR CIRCUIT.
1)Turn the ignition switch to START.
2)Measure the resistance of fuse.
Connector & terminal
(6 14) No. 1
-
Engine ground:
CHECK HARNESS BETWEEN BATTERY
AND IGNITION SWITCH CONNECTOR.
1)Turn the ignition switch to OFF.
2)Disconnect the connector from ignition
switch .
3)Measure the power supply voltage between
ignition switch the connector and chassis
ground.
Connector & terminal
(872) No. 1 (+)
-
Chassis ground ( - ) :
CHECK HARNESS BETWEEN BATTERY
AND IGNITION SWITCH CONNECTOR.
1)Connect the connector to ignition switch.
2)Turn the ignition switch to START.
3)Measure the voltage between ignition switch
and chassis ground.
Connector & terminal
(872) No. 3 (+)
-
Chassis ground (-):
Repair open circuil
of ground cable.
Check
Ioes the starter motor operate
qepair ground
short circuit.
vhen the switch starts?
Go to step 6.
s the trouble code stored in
nemory? <Ref. to EN(D0HC
-URBO)-80, LIST, List of Diag.
iostic Trouble Code (DTC).>
30 to step 8.
s the voltage more than 10 V?
Repair open circuii
in harness
between ignition
switch and battery,
s the resistance less than 5
a?
s the resistance less than 1
2?
s the resistance less than 1
3?
s the voltage more than 10 V?
s the voltage more than 10 V?
I
short circuit.
3epair open circuit Go to step 9.
3etween ignition
;witch and starter
notor
I
circuit.
EN(D0HC TURBO)-65