ABS(diag)-55
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
ABS (DIAGNOSTICS)
Step
Check
Yes
No
1
CHECK OUTPUT OF STOP LIGHT SWITCH
USING SUBARU SELECT MONITOR.
1) Select {Current Data Display & Save} in the
Subaru Select Monitor.
2) Release the brake pedal.
3) Read the stop light switch signal in Subaru
Select Monitor.
Is “OFF” displayed on the
screen?
Go to step 2.
Go to step 3.
2
CHECK OUTPUT OF STOP LIGHT SWITCH
USING SUBARU SELECT MONITOR.
1) Depress the brake pedal.
2) Read the stop light switch output in Subaru
Select Monitor.
Is “ON” displayed on the
screen?
Go to step 6.
Go to step 3.
3
CHECK IF STOP LIGHTS ILLUMINATE.
Depress the brake pedal.
Does the stop light illuminate?
Go to step 4.
Repair the stop
light circuit.
4
CHECK FUSE.
Check the relay block fuse (B225).
Is the fuse OK?
Go to step 5.
Replace the fuse.
5
CHECK OPEN CIRCUIT IN HARNESS.
1) Turn the ignition switch to OFF.
2) Disconnect the ABSCM&H/U connectors.
3) Depress the brake pedal.
4) Measure the voltage between ABSCM&H/U
connector and chassis ground.
Connector & terminal
(B301) No. 20 (+) — Chassis ground (–):
Is the voltage 10 — 15 V?
Go to step 6.
Repair the harness
between stop light
switch and
ABSCM&H/U con-
nector.
6
CHECK POOR CONTACT IN CONNECTOR.
Is there poor contact in the con-
nector between stop light
switch and ABSCM&H/U?
Repair the connec-
tor.
Go to step 7.
7
CHECK ABSCM&H/U.
1) Connect all connectors.
2) Clear the memory. <Ref. to ABS(diag)-20,
Clear Memory Mode.>
3) Perform the Inspection Mode. <Ref. to
ABS(diag)-19, Inspection Mode.>
4) Read the DTC.
Is the same DTC displayed?
Replace the
ABSCM only. <Ref.
to ABS-8,
REPLACEMENT,
ABS Control Mod-
ule and Hydraulic
Control Unit
(ABSCM&H/U).>
Go to step 8.
8
CHECK FOR ANY OTHER DTC ON DISPLAY. Is any other DTC displayed?
Check DTC using
“List of Diagnostic
Trouble Code
(DTC)”. <Ref. to
ABS(diag)-29, List
of Diagnostic Trou-
ble Code (DTC).>
Temporary poor
contact occurs.