Subaru Legacy IV (2008 year). Manual — part 911
ABS(diag)-43
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
ABS (DIAGNOSTICS)
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 illuminates as well as the ABS warning light.
WIRING DIAGRAM:
ABS00805
MAIN SBF
SBF-6
No.33
B301
E
E
15
18
ABSCM & H/U
BATTERY
GENERATOR
IGNITION
SWITCH
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
ABS(diag)-44
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
ABS (DIAGNOSTICS)
Step
Check
Yes
No
1
CHECK INPUT VOLTAGE OF ABSCM&H/U.
1) Turn the ignition switch to OFF.
2) Disconnect the ABSCM&H/U connectors.
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?
Go to step 2.
Repair the
ABSCM&H/U
power circuit.
2
CHECK THE ABSCM&H/U GROUND CIR-
CUIT.
1) Turn the ignition switch to OFF.
2) Measure the resistance between the
ABSCM&H/U connector and chassis ground.
Connector & terminal
(B301) No. 15 — Chassis ground:
Is the resistance less than 0.5
:? Go to step 3.
Repair the
ABSCM&H/U
ground harness.
3
CHECK POOR CONTACT IN CONNECTOR.
Is there poor contact in connec-
tor between generator, battery
and ABSCM&H/U?
Repair the connec-
tor.
Go to step 4.
4
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&H/U.
<Ref. to ABS-6,
ABS Control Mod-
ule and Hydraulic
Control Unit
(ABSCM&H/U).>
Go to step 5.
5
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.
ABS(diag)-45
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
ABS (DIAGNOSTICS)
R: DTC C0110 ABS CONTROL MODULE MALFUNCTION
DTC DETECTING CONDITION:
Defective ABSCM&H/U
TROUBLE SYMPTOM:
• ABS does not operate.
• EBD does not operate.
NOTE:
Brake warning light illuminates as well as the ABS warning light.
WIRING DIAGRAM:
ABS00415
E
ABSCM & H/U
B301
15
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
ABS(diag)-46
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
ABS (DIAGNOSTICS)
Step
Check
Yes
No
1
CHECK THE ABSCM&H/U GROUND CIR-
CUIT.
1) Turn the ignition switch to OFF.
2) Disconnect the ABSCM&H/U connectors.
3) Measure the resistance between the
ABSCM&H/U and chassis ground.
Connector & terminal
(B301) No. 15 — Chassis ground:
Is the resistance less than 0.5
:? Go to step 2.
Repair the
ABSCM&H/U
ground harness.
2
CHECK POOR CONTACT IN CONNECTOR.
Is there poor contact of the con-
nector between the battery,
ignition switch and ABSCM&H/
U?
Repair the connec-
tor.
Go to step 3.
3
CHECK CAUSE OF SIGNAL NOISE.
Is the car telephone or the radio
properly installed?
Go to step 4.
Properly install the
car telephone or
the radio.
4
CHECK CAUSE OF SIGNAL NOISE.
Is there a noise source (such as
an antenna) installed near the
sensor harness?
Install the noise
source apart from
the sensor har-
ness.
Go to step 5.
5
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 6.
6
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.
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