Subaru IMPREZA GD 2007 Series Manual page 3201

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Diagnostic Procedure with Diagnostic Trouble Code (DTC)
ABS (DIAGNOSTICS)
Step
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.
2 CHECK OUTPUT OF STOP LIGHT SWITCH
USING SUBARU SELECT MONITOR.
1) Depress the brake pedal.
2) Read the stop light switch signal in Subaru
Select Monitor.
3 CHECK IF STOP LIGHTS COME ON.
Depress the brake pedal.
4 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 (–):
5 CHECK POOR CONTACT OF CONNECTOR. Is there poor contact in the con-
6 CHECK ABSCM&H/U.
1) Connect all connectors.
2) Erase the memory.
3) Perform the Inspection Mode.
4) Read the DTC.
7 CHECK OTHER DTC DETECTION.
Check
Is "OFF" displayed on the
screen?
Is "ON" displayed on the
screen?
Does the stop light illuminate? Go to step 4.
Is the voltage 10 — 15 V?
nector between stop light
switch and ABSCM&H/U?
Is the same DTC still output?
Is there any other DTC
detected?
ABS(diag)-72
Yes No
Go to step 2. Go to step 3.
Go to step 5. Go to step 3.
Repair the stop
light circuit.
Go to step 5.
Repair the harness
between stop light
switch and
ABSCM&H/U con-
nector.
Go to step 6. Repair the connec-
tor.
Replace the Go to step 7.
ABSCM&H/U.
<Ref. to ABS-6,
ABS Control Mod-
ule and Hydraulic
Control Unit
(ABSCM&H/U).>
Perform the diag- Temporary poor
nosis according to contact occurs.
DTC.