Subaru Impreza 2003 Service Manual page 2518

DIAGNOSTICS PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
ABS (DIAGNOSTICS)
Step
10 CHECK LATERAL G SENSOR.
Measure the voltage between lateral G sensor
connector terminals.
Connector & terminal
(B257) No. 2 (+) — No. 3 ( − − − − ):
11 CHECK POOR CONTACT IN CONNECTORS.
Turn the ignition switch to OFF.
12 CHECK ABSCM&H/U.
1)Connect all connectors.
2)Erase the memory.
3)Perform the inspection mode.
4)Read out the DTC.
13 CHECK ANY OTHER DTC APPEARANCE.
Check
Is the voltage 0.5 — 0.9 V
when lateral G sensor is
inclined left to 90°?
Is there poor contact in con-
nector between ABSCM&H/U
and lateral G sensor?
Is the same DTC as in current
diagnosis still being output?
Are other DTCs being output? Proceed with the
ABS-178
Yes
Go to step 11. Replace the lateral
G sensor. <Ref. to
ABS-23, Lateral G
Sensor.>
Repair the con- Go to step 12.
nector.
Replace the Go to step 13.
ABSCM&H/U.
<Ref. to ABS-7,
ABS Control Mod-
ule and Hydraulic
Control Unit
(ABSCM&H/U).>
A temporary poor
diagnosis corre- contact.
sponding to DTC.
No