Subaru Legacy (2005 year). Service manual — part 772
ABS(diag)-53
ABS (DIAGNOSTICS)
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
J: DTC C0120 FRONT INLET SOLENOID VALVE LH MALFUNCTION IN ABS
CONTROL MODULE AND HYDRAULIC CONTROL UNIT (ABSCM&H/U)
NOTE:
For the diagnostic procedure, refer to DTC C0126. <Ref. to ABS(diag)-53, DTC C0126 REAR INLET SOLE-
NOID VALVE RH MALFUNCTION IN ABS CONTROL MODULE AND HYDRAULIC CONTROL UNIT (AB-
SCM&H/U), Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
K: DTC C0122 FRONT INLET SOLENOID VALVE RH MALFUNCTION IN ABS
CONTROL MODULE AND HYDRAULIC CONTROL UNIT (ABSCM&H/U)
NOTE:
For the diagnostic procedure, refer to DTC C0126. <Ref. to ABS(diag)-53, DTC C0126 REAR INLET SOLE-
NOID VALVE RH MALFUNCTION IN ABS CONTROL MODULE AND HYDRAULIC CONTROL UNIT (AB-
SCM&H/U), Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
L: DTC C0124 REAR INLET SOLENOID VALVE LH MALFUNCTION IN ABS
CONTROL MODULE AND HYDRAULIC CONTROL UNIT (ABSCM&H/U)
NOTE:
For the diagnostic procedure, refer to DTC C0126. <Ref. to ABS(diag)-53, DTC C0126 REAR INLET SOLE-
NOID VALVE RH MALFUNCTION IN ABS CONTROL MODULE AND HYDRAULIC CONTROL UNIT (AB-
SCM&H/U), Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
M: DTC C0126 REAR INLET SOLENOID VALVE RH MALFUNCTION IN ABS
CONTROL MODULE AND HYDRAULIC CONTROL UNIT (ABSCM&H/U)
DTC DETECTING CONDITION:
• Defective harness connector
• Defective inlet solenoid valve in ABSCM&H/U
TROUBLE SYMPTOM:
• ABS does not operate.
• EBD does not operate.
NOTE:
Brake warning light comes on as well as ABS warning light.
9
CHECK ANY OTHER DTC ON DISPLAY.
Is any other DTC displayed?
Perform the diag-
nosis according to
DTC.
It results from a
temporary noise
interference.
NOTE:
Though ABS warn-
ing light remains to
illuminate at this
time, it is normal.
Drive the vehicle at
more than 12 km/h
(7 MPH) in order to
make ABS warning
light go off. Be sure
to drive the vehicle
and check the
warning light goes
off.
Step
Check
Yes
No
ABS(diag)-54
ABS (DIAGNOSTICS)
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
WIRING DIAGRAM:
ABS00622
MAIN SBF
SBF-6
No.33
B301
E
E
15
18
ABSCM & H/U
B301
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
BATTERY
IGNITION
SWITCH
GENERATOR
ABS(diag)-55
ABS (DIAGNOSTICS)
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
Step
Check
Yes
No
1
CHECK INPUT VOLTAGE OF ABSCM&H/U.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from ABSCM&H/
U.
3) Run the engine at idle.
4) Measure the voltage between ABSCM&H/
U connector and chassis ground.
Connector & terminal
(B301) No. 18 (+) — Chassis ground (
−
):
Is the voltage 10 — 15 V?
Repair the
ABSCM&H/U
power circuit.
2
CHECK GROUND CIRCUIT OF ABSCM&H/U.
1) Turn the ignition switch to OFF.
2) Measure the resistance between
ABSCM&H/U connector and chassis ground.
Connector & terminal
(B301) No. 15 — Chassis ground:
Is the resistance less than 0.5
Ω?
Repair the
ABSCM&H/U
ground harness.
3
CHECK POOR CONTACT IN CONNECTOR. Is there poor contact in con-
nector between generator, bat-
tery and ABSCM&H/U?
Repair the con-
nector.
4
CHECK ABSCM&H/U.
1) Connect all the connectors.
2) Perform clear memory mode.
3) Perform the inspection mode.
4) Read the DTC.
Is the same DTC displayed?
Replace
ABSCM&H/U.
<Ref. to ABS-6,
ABS Control Mod-
ule and Hydraulic
Control Unit
(ABSCM&H/U).>
5
CHECK ANY OTHER DTC ON DISPLAY.
Is any other DTC displayed?
Inspect the DTC
using “List of Diag-
nostic Trouble
Code (DTC)”.
<Ref. to
ABS(diag)-38, List
of Diagnostic Trou-
ble Code (DTC).>
Temporary poor
contact occurs.
ABS(diag)-56
ABS (DIAGNOSTICS)
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
N: DTC C0121 FRONT OUTLET SOLENOID VALVE LH MALFUNCTION IN ABS
CONTROL MODULE AND HYDRAULIC CONTROL UNIT (ABSCM&H/U)
NOTE:
For the diagnostic procedure, refer to DTC C0127. <Ref. to ABS(diag)-56, DTC C0127 REAR OUTLET SO-
LENOID VALVE RH MALFUNCTION IN ABS CONTROL MODULE AND HYDRAULIC CONTROL UNIT
(ABSCM&H/U), Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
O: DTC C0123 FRONT OUTLET SOLENOID VALVE RH MALFUNCTION IN ABS
CONTROL MODULE AND HYDRAULIC CONTROL UNIT (ABSCM&H/U)
NOTE:
For the diagnostic procedure, refer to DTC C0127. <Ref. to ABS(diag)-56, DTC C0127 REAR OUTLET SO-
LENOID VALVE RH MALFUNCTION IN ABS CONTROL MODULE AND HYDRAULIC CONTROL UNIT
(ABSCM&H/U), Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
P: DTC C0125 REAR OUTLET SOLENOID VALVE LH MALFUNCTION IN ABS
CONTROL MODULE AND HYDRAULIC CONTROL UNIT (ABSCM&H/U)
NOTE:
For the diagnostic procedure, refer to DTC C0127. <Ref. to ABS(diag)-56, DTC C0127 REAR OUTLET SO-
LENOID VALVE RH MALFUNCTION IN ABS CONTROL MODULE AND HYDRAULIC CONTROL UNIT
(ABSCM&H/U), Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
Q: DTC C0127 REAR OUTLET SOLENOID VALVE RH MALFUNCTION IN ABS
CONTROL MODULE AND HYDRAULIC CONTROL UNIT (ABSCM&H/U)
DTC DETECTING CONDITION:
• Defective harness connector
• Defective outlet solenoid valve in ABSCM&H/U
TROUBLE SYMPTOM:
• ABS does not operate.
• EBD does not operate.
NOTE:
Brake warning light comes on as well as ABS warning light.
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