Subaru Legacy (2005 year). Service manual — part 774
ABS(diag)-61
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)-62
ABS (DIAGNOSTICS)
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
Step
Check
Yes
No
1
CHECK GENERATOR.
1) Start the engine.
2) Run the engine at idle after warming up.
3) Measure the voltage between generator B
terminal and chassis ground.
Terminals
Generator B terminal (+) — Chassis
ground (
−
):
Is the voltage 10 — 15 V?
Repair the genera-
tor.
2
CHECK BATTERY TERMINAL.
Turn the ignition switch to OFF.
Are the positive and negative
battery terminals clamped
tightly?
Tighten the termi-
nal.
3
CHECK INPUT VOLTAGE OF ABSCM&H/U.
1) Disconnect the connector from ABSCM&H/
U.
2) Run the engine at idle.
3) Operate the devices such as headlights, air
conditioner, defogger, etc. which produce
much electrical loading.
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.
4
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.
5
CHECK POOR CONTACT IN CONNECTOR. Is there poor contact in con-
nector between generator, bat-
tery and ABSCM&H/U?
Repair the con-
nector.
6
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 the
ABSCM only.
<Ref. to ABS-8,
REPLACEMENT,
ABS Control Mod-
ule and Hydraulic
Control Unit
(ABSCM&H/U).>
7
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)-63
ABS (DIAGNOSTICS)
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
T: DTC C0140 CAN COMMUNICATION MALFUNCTION
DTC DETECTING CONDITION:
Defective CAN communication
TROUBLE SYMPTOM:
Possibly the vehicle speed cannot output on CAN.
Step
Check
Yes
No
1
CHECK LAN SYSTEM.
Perform the diagnosis for LAN system. <Ref. to
LAN(diag)-24, OPERATION, Read Diagnostic
Trouble Code (DTC).>
Is there any fault in LAN sys-
tem?
Repair it according
to DTC of LAN
system.
Replace the
ABSCM only.
<Ref. to ABS-8,
REPLACEMENT,
ABS Control Mod-
ule and Hydraulic
Control Unit
(ABSCM&H/U).>
ABS(diag)-64
ABS (DIAGNOSTICS)
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
U: DTC C0114 VALVE RELAY MALFUNCTION
DTC DETECTING CONDITION:
Defective valve relay
TROUBLE SYMPTOM:
• ABS does not operate.
• EBD does not operate depending on the trouble contents.
NOTE:
Brake warning light comes on as well as ABS warning light when EBD does not operate.
WIRING DIAGRAM:
B301
ABS00686
B301
E
14
15
ABSCM & H/U
18
M
MAIN SBF
SBF-6
No.1
No.33
E
7 8 9 10 11
6
5
4
1
15
14
13
12
2 3
22 23 24 25 26
21
20
19
16 17 18
BATTERY
IGNITION
SWITCH
MOTOR RELAY
VALVE
RELAY
SOLENOID
VALVE
PUMP MOTOR
FL INLET
RL INLET
FR INLET
RR INLET
FL OUTLET
RL OUTLET
FR OUTLET
RR OUTLET
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