Subaru 2002 IMPREZA Service Manual page 2128

DIAGNOSTICS CHART WITH DIAGNOSIS CONNECTOR
ABS (DIAGNOSTICS)
Step
2 CHECK ABS AND BRAKE WARNING LIGHT
BULB.
1)Turn the ignition switch to OFF.
2)Remove the combination meter.
3)Remove the ABS and brake warning light
bulb from combination meter.
3 CHECK BATTERY SHORT OF ABS AND
BRAKE WARNING LIGHT HARNESS.
1)Disconnect the connector (i2) from connec-
tor (B37).
2)Measure the voltage between connector (i2)
and chassis ground.
Connector & terminal
LHD: (i2) No. 2 (+) and No. 4 (+) — Chas-
sis ground ( − − − − ):
RHD: (i2) No. 1 (+) and No. 3 (+) — Chas-
sis ground ( − − − − ):
4 CHECK BATTERY SHORT OF ABS AND
BRAKE WARNING LIGHT HARNESS.
1)Turn the ignition switch to ON.
2)Measure the voltage between connector (i2)
and chassis ground.
Connector & terminal
LHD: (i2) No. 2 (+) and No. 4 (+) — Chas-
sis ground ( − − − − ):
RHD: (i2) No. 1 (+) and No. 3 (+) — Chas-
sis ground ( − − − − ):
5 CHECK WIRING HARNESS.
1)Turn the ignition switch to OFF.
2)Install the ABS and brake warning light bulb
to combination meter.
3)Install the combination meter.
4)Turn the ignition switch to ON.
5)Measure the voltage between connector (i2)
and chassis ground.
Connector & terminal
LHD: (i2) No. 2 (+) and No. 4 (+) — Chas-
sis ground ( − − − − ):
RHD: (i2) No. 1 (+) and No. 3 (+) — Chas-
sis ground ( − − − − ):
6 CHECK BATTERY SHORT OF ABS AND
BRAKE WARNING LIGHT HARNESS.
1)Turn the ignition switch to OFF.
2)Measure the voltage between connector
(B37) and chassis ground.
Connector & terminal
LHD: (B37) No. 2 (+) and No.4 (+) —
Chassis ground ( − − − − ):
RHD: (B37) No. 1 (+) and No. 3 (+) —
Chassis ground ( − − − − ):
7 CHECK BATTERY SHORT OF ABS AND
BRAKE WARNING LIGHT HARNESS.
1)Turn the ignition switch to ON.
2)Measure the voltage between connector
(B37) and chassis ground.
Connector & terminal
LHD: (B37) No. 2 (+) and No.4 (+) —
Chassis ground ( − − − − ):
RHD: (B37) No. 1 (+) and No. 3 (+) —
Chassis ground ( − − − − ):
Check
Are the ABS and brake warn-
ing light bulb OK?
Is the voltage less than 3 V?
Is the voltage less than 3 V?
Is the voltage between 10 and
15 V?
Is the voltage less than 3 V?
Is the voltage less than 3 V?
ABS-30
Yes
Go to step 3. Replace the ABS
and brake warn-
ing light bulb.
<Ref. to IDI-15,
Combination
Meter Assembly.>
Go to step 4. Repair the warning
light harness.
Go to step 5. Repair the warning
light harness.
Go to step 6. Repair the wiring
harness.
Go to step 7. Repair the wiring
harness.
Go to step 8. Repair the wiring
harness.
No