Subaru IMPREZA 2002 Service Manual page 273

DIAGNOSTICS CHART WITH DIAGNOSIS CONNECTOR
M
ABS (DIAGNOSTICS)
Yes
Go to step 2.
Go to step 3 .
No
Repair the stop
lights circuit.
Repair harness
between stop light
switch and
ABSCM&H/U.
Step
CHECK STOP LIGHTS COME ON.
Depress the brake pedal.
CHECK OPEN CIRCUIT IN HARNESS.
1)Turn the ignition switch to OFF.
2)Disconnect the connector from ABSCM&
H/U.
3)Depress the brake pedal.
4)Measure the voltage between ABSCM&H/U
connector and chassis ground.
I
!
Connector
&
terminal
(F49) No. 2 (+)
-
Chassis ground (-):
CHECK POOR CONTACT IN CONNECTORS.
3
1 CHECK ABSCM&WU.
1)Connect all connectors.
2)Erase the memory.
3)Perform the inspection mode.
4)Read out the diagnostic trouble code.
5
CHECK ANY OTHER DIAGNOSTIC TROU-
BLE CODES APPEARANCE.
nector.
Check
Do the stop lights come on?
Is the voltage between 10 and
15 V?
Is there poor contact in con-
nector between stop light
switch and ABSCM&H/U?
Is the same diagnostic trouble
code as in the current diagno-
sis still being output?
Are other diagnostic trouble
codes being output?
Replace the
ABSCM&H/U.
<Ref. to ABS-7,
ABS Control Mod-
ule and Hydraulic
Control Unit
(ABSCM&H/U).>
Proceed with the
diagnosis corre-
sponding to the
diagnostic trouble
code.
Go to step 5.
A temporary poor
contact.
ABS-87