Subaru IMPREZA 2002 Service Manual page 536

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
ENGINE (DIAGNOSTICS)
s the resistance less than
1
Step
I
CHECK HARNESS BETWEEN ECM AND
COUPLING CONNECTOR IN REAR WIRING
HARNESS.
1)Turn the ignition switch to OFF.
2)Disconnect the connector from ECM.
3)Measure the resistance of harness between
ECM and rear wiring harness connector.
Connector & terminal
( 8 1 3 6 ) NO. 1 2
-
( R 1 5 ) NO. 10:
1Go to step 9.
I
CHECK HARNESS BETWEEN ECM AND
COUPLING CONNECTOR IN REAR WIRING
HARNESS.
Measure the resistance of harness between
rear wiring harness connector and chassis
ground.
Connector & terminal
( 8 1 3 6 ) N o . l 6 - ( R 1 5 ) N O . 11:
1
CHECK FUEL TANK CORD.
1)Disconnect the connector from fuel tank
pressure sensor.
2)Measure the resistance of fuel tank cord.
Connector & terminal
(R57) NO. 1 0
-
(R47) NO.
2:
0 CHECK FUEL TANK CORD.
Measure the resistance of fuel tank cord.
Connector & terminal
(R57) NO. 11
-
(R47) NO. 2:
I1
CHECK POOR CONTACT.
Check poor contact in fuel tank pressure sen-
sor connector.
2 CHECK HARNESS BETWEEN ECM AND
FUEL TANK PRESSURE SENSOR CONNEC.
TOR.
1)Turn the ignition switch to OFF.
2)Disconnect the connector from fuel tank
pressure sensor.
3)Turn the ignition switch to ON.
4)Read the data of fuel tank pressure sensor
signal using Subaru Select Monitor or the
OBD-ll general scan tool.
NOTE:
*Subaru Select Monitor
For detailed operation procedure, refer to the
"READ CURRENT DATA FOR ENGINE". <Ref.
to EN(S0HC)-32, Subaru Select Monitor.>
*OBD-11 general scan tool
For detailed operation procedures, refer to the
OBD-ll General Scan Tool Instruction Manual.
Check
s the resistance less than 1
n?
Yes
So
to
step 8.
n?
I
1
s the resistance less than 1 Go to step 10.
s the resistance less than 1
R?
I
Go to step 11.
s there poor contact in fuel Repair poor con-
ank pressure sensor connec- tact in fuel tank
,
connector. pressure sensor
I
s
the value more than 2.8 kPa
1
Repair battery
121 .O mmHg, 0.827 inHg)?
short circuit in har.
ness between
ECM and fuel tank
pressure sensor
connector.
EN(S0HC)-212
No
3epair harness
md connector.
\IOTE:
n this case, repaii
he following:
'
Open circuit in
iarness between
ICM and rear wir-
ng harness con-
lector (R57)
Poor contact in
:ouplingconnector
898)
3epair ground
ihort circuit in har-
less between
X M and rear wir-
ng harness con-
lector (R57).
3epair open circuit
n fuel tank cord.
3epair open circuit
n fuel tank cord.
3eplace the fuel
ank pressure sen-
ior. <Ref. to
%el Tank Pres-
iure Sensor.>
3eplace the fuel
ank pressure sen-
ior. <Ref. to
%el Tank Pres-
jure Sensor.>
IC(S0HC)-1 0,
EC(SOHC)-lO,