Subaru Impreza 2003, Service Manual

Page: 3062 / 3610

IDI-6
INSTRUMENTATION/DRIVER INFO
COMBINATION METER SYSTEM
3. CHECK VEHICLE SPEED SENSOR
Step Check Yes No
1 CHECK VEHICLE SPEED SENSOR.
1)Lift-up the vehicle and support it with safety
stands.
2)Remove the combination meter with harness
connector.
3)Drive the vehicle at a speed greater than 20
km/h (12 MPH).
Warning:
Be careful not to get caught in the running
wheels.
4)Measure the voltage between combination
meter connector and chassis ground.
Connector & terminal
(i11) No. 2 (+) — Chassis ground (
−−−−
):
Is the voltage less than 1 V
←→
more than 5 V?
Check the speed-
ometer. <Ref. to
IDI-18,
REMOVAL,
Speedometer.> Go to step 2.
2 CHECK VEHICLE SPEED SENSOR POWER
SUPPLY.
1)Turn the ignition switch to OFF.
2)Disconnect the vehicle speed sensor har-
ness connector.
3)Turn the ignition switch to ON.
4)Measure the voltage between vehicle speed
sensor connector and engine ground.
Connector & terminal
(B17) No. 3 (+) — Chassis ground (
−−−−
):
Is the voltage more than 10 V? Go to step 3. Check the harness
for open or short
between ignition
switch and vehicle
speed sensor.
3 CHECK HARNESS BETWEEN VEHICLE
SPEED SENSOR AND ENGINE GROUND.
1)Turn the ignition switch to OFF.
2)Measure the resistance between vehicle
speed sensor connector and engine ground.
Connector & terminal
(B17) No. 2 — Chassis ground:
Is the resistance less than 10
Ω
?
Go to step 4. Repair the wiring
harness.
4 CHECK HARNESS BETWEEN VEHICLE
SPEED SENSOR AND COMBINATION
METER.
1)Disconnect the connector from combination
meter.
2)Measure the resistance between vehicle
speed sensor harness connector and combi-
nation meter harness connector.
Connector & terminal
(B17) No. 1 — (i11) No. 2:
Is the resistance less than 10
Ω
?
Replace the vehi-
cle speed sensor. Repair the wiring
harness.