Subaru Impreza 2003 Service Manual page 2371

DIAGNOSTICS PROCEDURE WITHOUT DIAGNOSTIC TROUBLE CODE (DTC)
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 warning light and brake
warning light.
3 CHECK BATTERY SHORT OF ABS HAR-
NESS.
1)Disconnect the connector (i2) from connec-
tor (B37).
2)Measure the voltage between connector (i2)
and chassis ground.
Connector & terminal
LHD: (i2) No. 15 (+) — Chassis ground
( − − − − ):
RHD: (i2) No. 1 (+) — Chassis 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. 15 (+) — Chassis ground
( − − − − ):
RHD: (i2) No. 1 (+) — Chassis ground ( − − − − ):
5 CHECK WIRING HARNESS.
1)Turn the ignition switch to OFF.
2)Install the combination meter.
3)Turn the ignition switch to ON.
4)Measure the voltage between connector (i2)
and chassis ground.
Connector & terminal
LHD: (i2) No. 15 (+) — Chassis ground
( − − − − ):
RHD: (i2) No. 1 (+) — Chassis 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. 15 (+) — Chassis ground
( − − − − ):
RHD: (B37) No. 1 (+) — 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. 15 (+) — Chassis ground
( − − − − ):
RHD: (B37) No. 1 (+) — Chassis ground
( − − − − ):
Check
Is the ABS warning light bulb
open?
Is the voltage less than 3 V?
Is the voltage less than 3 V?
Is the voltage 10 — 15 V?
Is the voltage less than 3 V?
Is the voltage less than 3 V?
ABS-31
ABS (DIAGNOSTICS)
Yes
Replace the ABS Go to step 3.
and brake warn-
ing light bulb.
<Ref. to IDI-14,
Combination
Meter Assembly.>
Go to step 4. Repair battery
short in the warn-
ing light harness.
Go to step 5. Repair battery
short in the warn-
ing light harness.
Go to step 6. Repair open circuit
in the wiring har-
ness.
Go to step 7. Repair battery
short in the wiring
harness.
Go to step 8. Repair battery
short in the wiring
harness.
No