Subaru IMPREZA 2002 Service Manual page 627

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
ENGINE (DIAGNOSTICS)
Check
Does the Subaru Select Moni-
tor or OBD-ll general scan tool
indicate DTC P0720?
Does the speedometer operate
normally?
Step
CHECK DTC PO720 ON DISPLAY.
Yes
Check front vehi-
cle speed sensor
signal circuit.
<Ref. to AT-57,
DTC 33 FRONT
VEHICLE SPEED
SENSOR, Diag-
nostic Procedure
with Diagnostic
Trouble Code
(DTC).>
Go to step
3 .
CHECK SPEEDOMETER OPERATION IN
COMBINATION METER.
CHECK HARNESS BETWEEN ECM AND
COMBINATION METER CONNECTOR.
1)Turn the ignition switch to OFF.
Is the resistance less than 10 Repair poor con-
a?
tact in ECM con-
nector.
No
I
50
to step 2.
;heck speedome-
er and vehicle
;peed sensor.
:Ref. to IDI-13,
3peedometer.z
3epair harness
md connector.
UOTE:
n this case, repair
,he following:
1
Open circuit in
iarness between
I C M and combi-
iation meter con-
lector
1
Poor contact in
ECM connector
1
Poor contact in
:ombination meter
:onnector
Poor contact in
:oupling connector
(i2)
EN(S0HC)-303