Subaru 2002 IMPREZA Service Manual page 448

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
ENGINE (DIAGNOSTICS)
Step
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
(6 135) NO. 15
-
(R 15) NO. 10:
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
(8135)
NO.
9
-
(R15)
NO.
9:
I
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. 11
-
(R47) NO. 2:
0
CHECK FUEL TANK CORD.
Measure the resistance of fuel tank cord.
Connector & terminal
(R57) NO. 10
-
(R47)
NO.
1:
1 CHECK POOR CONTACT.
Check poor contact in fuel tank pressure sen-
sor connector.
I2
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:
Gubaru Select Monitor
For detailed operation procedure, refer to the
"READ CURRENT DATA FOR ENGINE". <Ref.
to EN(D0HC TURBO)-38, Subaru Select Mon
itor.>
-0BD-II general scan tool
For detailed operation procedures, refer to the
OBD-ll General Scan Tool Instruction Manual.
Check
j
the resistance less than 1
I?
;the resistance less than 1
2?
j
the resistance less than 1
1?
;the resistance less than 1
I?
;
there poor contact in fuel
snk pressure sensor connec-
x ?
s the value more than 2.8 kPa
21
.O
mmHg, 0.827 inHg)?
~~
Yes
30 to step 8.
30 to step 9.
So to step 10.
Go to step 11.
Repair poor con-
tact in fuel tank
pressure sensor
connector.
Repair battery
short circuit in har
ness between
ECM and fuel tank
pressure sensor
connector.
No
3epair harness
md connector.
\IOTE:
n this case, repaii
he following:
Open circuit in
iarness between
X M and rear wir-
ng harness con-
lector
Poor contact in
:oupling connectoi
3epair ground
;hort circuit in har-
less between
X M and rear wir-
ng harness con-
lector.
3epair open circuit
n fuel tank cord.
3epair open circuit
n fuel tank cord.
3eplace the fuel
ank pressure sen-
;or. <Ref. to
X(DOHC
rURBO)-I 1, Fuel
rank Pressure
Sensor. >
3eplace the fuel
:ank pressure sen.
;or. <<Ref. to
EC(D0HC
rURBO)-I 1, Fuel
rank Pressure
Sensor.>
EN(D0HC TURBO)-224