Subaru Legacy (2005 year). Manual — part 763

ABS(diag)-17

ABS (DIAGNOSTICS)

Subaru Select Monitor

3. CLEAR MEMORY MODE

1) On the «Main Menu» display screen, select the
{2. Each System Check} and press the [YES] key.
2) On the «System Selection Menu» display
screen, select the {Brake Control} and press the
[YES] key.
3) Press the [YES] key after the {ABS} is displayed.
4) On the «Brake Control Diagnosis» display
screen, select the {Clear Memory} and press the
[YES] key.

5) When “Done” and “Turn ignition switch OFF” are
shown on the display screen, turn the Subaru Se-
lect Monitor power switch and ignition switch to
OFF.

NOTE:
For details concerning operation procedure, refer
to the SUBARU SELECT MONITOR OPERATION
MANUAL.

4. ABS SEQUENCE CONTROL

5. FREEZE FRAME DATA

NOTE:
• Data stored at the time of trouble occurrence is
shown on display.
• Each time trouble occurs, the latest information
is stored in the freeze frame data in memory.
• Freeze frame data will be memorized up to three.
• If a Freeze Frame Data is not properly stored in
memory (due to a drop in ABS control module pow-
er supply, etc.), the DTC which is suffixed with a
question mark “?” appears on the Subaru Select
Monitor display. This shows it may be an unreliable
reading.

Display

Contents to be monitored

Clear memory?

Function of clearing DTC.

Display

Contents to be monitored

Index No.

ABS
sequence
control

Operate the valve and
pump motor continuously
to perform the ABS
sequence control.

<Ref. to ABS-
10, ABS
Sequence Con-
trol.>

Display

Contents to be monitored

FR Wheel

Wheel speed detected by the Front ABS
wheel speed sensor RH is displayed in
km/h or MPH.

FL Wheel

Wheel speed detected by the Front ABS
wheel speed sensor LH is displayed in
km/h or MPH.

RR Wheel

Wheel speed detected by the Rear ABS
wheel speed sensor RH is displayed in
km/h or MPH.

RL Wheel

Wheel speed detected by the Rear ABS
wheel speed sensor LH is displayed in
km/h or MPH.

IG power supply
voltage

Voltage supplied (V) to ABSCM&H/U is
displayed.

G Sensor

Vehicle acceleration detected by analog
G sensor is displayed.

Motor relay mon-
itor

Motor relay condition is displayed.

BLS Signal

Brake ON/OFF is displayed.

Vehicle speed

Vehicle speed calculated by ABS control
module is displayed.

ABS Control
Flag

ABS control condition is displayed.

Power Supply
Failure

Whether abnormal voltage occurred or
not is displayed during malfunction.

ABS(diag)-18

ABS (DIAGNOSTICS)

Subaru Select Monitor

B: INSPECTION

1. COMMUNICATION FOR INITIALIZING IMPOSSIBLE

DETECTING CONDITION:
Defective harness connector
TROUBLE SYMPTOM:
Communication is impossible between ABS and Subaru Select Monitor.
WIRING DIAGRAM:

ABS00621

B301

B40

1 2 3 4 5 6 7 8

9 10 11 12 13 14 15 16

MAIN SBF

SBF-6

No.33

B40

B301

E

E

1

10

7

15

18

ABSCM & H/U

1 2 3 4 5 6 7 8 9 10 11

16 17 18 19 20 21 22 23 24 25 26

13

12

15

14

IGNITION
SWITCH

BATTERY

DATA LINK
CONNECTOR

No.13

ABS(diag)-19

ABS (DIAGNOSTICS)

Subaru Select Monitor

Step

Check

Yes

No

1

CHECK IGNITION SWITCH.

Does the ignition switch turn to
ON?

Go to step 2.

Turn the ignition
switch to ON, and
select ABS mode
using Subaru
Select Monitor.

2

CHECK BATTERY.
1) Turn the ignition switch to OFF.
2) Measure the battery voltage.

Is the voltage more than 11 V? Go to step 3.

Charge or replace
the battery.

3

CHECK BATTERY TERMINAL.

Is there poor contact at battery
terminal?

Repair or tighten
the battery termi-
nal.

Go to step 4.

4

CHECK SUBARU SELECT MONITOR COM-
MUNICATION.
1) Turn the ignition switch to ON.
2) Using Subaru Select Monitor, check
whether communication to other system can
be executed normally.

Is the system name and model
year displayed on Subaru
Select Monitor?

Go to step 8.

Go to step 5.

5

CHECK SUBARU SELECT MONITOR COM-
MUNICATION.
1) Turn the ignition switch to OFF.
2) Disconnect the ABSCM&H/U connector.
3) Turn the ignition switch to ON.
4) Check whether communication to other
systems can be executed normally.

Is the system name and model
year displayed on Subaru
Select Monitor?

Replace
ABSCM&H/U.
<Ref. to ABS-6,
ABS Control Mod-
ule and Hydraulic
Control Unit
(ABSCM&H/U).>

Go to step 6.

6

CHECK HARNESS CONNECTOR BETWEEN
EACH CONTROL MODULE AND DATA LINK
CONNECTOR.
1) Turn the ignition switch to OFF.
2) Disconnect ABSCM&H/U, ECM and TCM.
3) Measure the resistance between data link
connector and chassis ground.

Connector & terminal

(B40) No. 10 — Chassis ground:

Is the resistance more than 1
M

Ω?

Go to step 7.

Repair the har-
ness and connec-
tor between each
control module
and data link con-
nector.

7

CHECK OUTPUT SIGNAL FOR ABSCM&H/
U.
1) Turn the ignition switch to ON.
2) Measure the voltage between data link con-
nector and chassis ground.

Connector & terminal

(B40) No. 10 (+) — Chassis ground (

−

):

Is the voltage less than 1 V?

Go to step 8.

Repair the har-
ness and connec-
tor between each
control module
and data link con-
nector.

8

CHECK HARNESS CONNECTOR BETWEEN
ABSCM&H/U AND DATA LINK CONNEC-
TOR.
Measure the resistance between ABSCM&H/U
connector and data link connector.

Connector & terminal

(B301) No. 7 — (B40) No. 10:

Is the resistance less than 0.5
Ω?

Go to step 9.

Repair the har-
ness and connec-
tor between
ABSCM&H/U and
data link connec-
tor.

9

CHECK INSTALLATION OF ABSCM&H/U
CONNECTOR.
Turn the ignition switch to OFF.

Is the ABSCM&H/U connector
inserted into ABSCM&H/U until
it is locked by clamps?

Go to step 10.

Insert ABSCM&H/
U connector into
ABSCM&H/U.

10

CHECK POWER SUPPLY CIRCUIT.
1) Turn the ignition switch to ON. (engine
OFF)
2) Measure the ignition power supply voltage
between ABSCM&H/U connector and chassis
ground.

Connector & terminal

(B301) No. 18 (+) — Chassis ground (

−

):

Is the voltage 10 — 15 V?

Go to step 11.

Repair the open
circuit in harness
between
ABSCM&H/U and
battery.

ABS(diag)-20

ABS (DIAGNOSTICS)

Subaru Select Monitor

2. WITHOUT DTC

DETECTING CONDITION:
• Defective combination meter
• Open in harness
TROUBLE SYMPTOM:
• ABS warning light does not go off.
• “NO TROUBLE CODE” will be displayed on the Subaru Select Monitor.

NOTE:
When the ABS warning light is OFF and “NO TROUBLE CODE” is displayed on Subaru Select Monitor, the
system is in normal condition.

11

CHECK HARNESS CONNECTOR BETWEEN
ABSCM&H/U AND CHASSIS GROUND.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from ABSCM&H/
U.
3) Measure the resistance of harness
between ABSCM&H/U connector and chassis
ground.

Connector & terminal

(B301) No. 15 — Chassis ground:

Is the resistance less than 0.5
Ω?

Go to step 12.

Repair the open
circuit in harness
between
ABSCM&H/U and
inhibitor side con-
nector, and poor
contact in cou-
pling connector.

12

CHECK POOR CONTACT IN CONNECTOR. Is there poor contact in control

module power supply, ground
circuit and data link connector?

Repair the con-
nector.

Replace the
ABSCM only.
<Ref. to ABS-8,
REPLACEMENT,
ABS Control Mod-
ule and Hydraulic
Control Unit
(ABSCM&H/U).>

Step

Check

Yes

No