Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Subaru Legacy 1995-1999 Approved Subaru Legacy 1997 1997 Service Manual 1997 LEGACY MANUAL SUPPLEMENT ABS 5.3I SYSTEM Diagnostics Section MSA5T9712A29603
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4-4a [TBAO1 BRAKES [ABS 5.31 TYPE]
8. Diagnostics Chart with Trouble Code by ABS Warning Light
8 . Diagnostics Chart with Trouble Code
by ABS Warning Light
A: LIST OF TROUBLE CODE
Trouble code Contents of diagnosis Ref. to
Start code
11 e Trouble code is shown after start code . -
* Only start code is shown in normal condition .
21 Front right ABS sensor [T8B0]*10
23 Abnormal ABS sensor Front left ABS sensor [T8C0]*10
25 (Open circuit or input voltage too high) Rear right ABS sensor [T8D0]*10
27 Rear left ABS sensor [T8E0]x10
22 Front right ABS sensor [T8F0]*10
24 Front left ABS sensor [T8G0]dr10
Abnormal ABS sensor
26 Rear right ABS sensor [T8H0]*10
(Abnormal ABS sensor signal)
28 Rear left ABS sensor [T810]*10
29 Any one of four [T8J0]*10
31 Front right inlet valve [T8K0]*10
32 Front right outlet valve [7800]*10
33 Front left inlet valve [TSLO]*10
34 Abnormal solenoid valve circuit(s) in Front left outlet valve [T8PO]*10
35 ABS control module and hydraulic unit Rear right inlet valve [T8M0]*10
36 Rear right outlet valve [T8QOj*10
37 Rear left inlet valve [T8N0]x10
38 Rear left outlet valve [T8R0]*10
41 Abnormal ABS control module [T8SO1*10
42 Source voltage is abnormal . [7870]*10
44 A combination of AT control abnormal [T8U0]t`r10
51 Abnormal valve relay [T8V0]*10
52 Abnormal motor and/or motor relay [T8W0]*10
54 Abnormal stop light switch (78X0]*10
56 Abnormal G sensor output voltage [T8Y0)*10
30
4-4d [rsBO] BRAKES [ABS 5.31 TYPE]
8. Diagnostics Chart with Trouble Code by ABS Warning Light
B: TROUBLE CODE 21 (FRONT RH)
C: TROUBLE CODE 23 (FRONT LH)
D : TROUBLE CODE 25 (REAR RH)
E : TROUBLE CODE 27 (REAR LH)
- ABNORMAL ABS SENSOR (OPEN CIRCUIT
OR INPUT VOLTAGE TOO HIGH) -
DIAGNOSIS :
" Faulty ABS sensor (Broken wire, input voltage too high)
Faulty harness connector
TROUBLE SYMPTOM:
* ABS does not operate.
WIRING DIAGRAM:
F49
Front ABS
sensor LH
Front ABS
sensor RH
ABS
control
module
and Rear ABS
hydraulic sensor LH
control
unit
RearABS
sensor RH
r----------------
I OUTBACK with step roof model I
I Q I
RearABS
-C~l sensor LH
I I
RearABS j
~--m sensor RH
I Q I
------------J
OUTBACK
with step
roof model B~5 O
O P8 OO Ft 100 f{9
1 345678911112131415
1 3 1 10 11 16 117 1181191202 122 4 26
4 78 70969 7128129130131 1
B4M1238
32
BRAKES [ABS 5 .31 TYPE] [TSE2] 4-4d
8. Diagnostics Chart with Trouble Code by ABS Warning Light
Except OUTBACK model $E1 CHECK ABS SENSOR .
1) Turn ignition switch to OFF.
1 2 2) Disconnect connector from ABS sensor.
3) Measure resistance of ABS sensor connector terminals .
Terminal
Front RH No. 1 - No. 2:
D Front LH No. 1 - No. 2:
S2 Rear RH No. 1 - No, 2:
B4MOSO6E Rear LH No. 1 - No. 2:
CHECK : Is the resistance between 0.8 and 1 .2 kS2?
OUTBACK model
,rES : Go to step 8E2.
Rear
Front
No : Replace ABS sensor.
1 2 2 1
D
84M1036C
Except OUTBACK model 8E2 I CHECK BATTERY SHORT OF ABS SENSOR .
1) Disconnect connector from ABSCM&H1U .
1 2 2) Measure voltage between ABS sensor and chassis
ground .
Terminal
Front RH No. 1 (+) - Chassis ground ():
Front LH No. 1 (+) - Chassis ground ():
f L
- Vq 1 Rear RH No. 1 ( +) - Chassis ground ():
B4MO807E Rear LH No. 1 (+) - Chassis ground ():
CHECK : Is the voltage less than 1 V?
OUTBACK model
vES : Go to step 8E3.
Front Rear No : Replace ABS sensor.
2 1
D
_v B4M1037C
33
4-4d [T8E3] BRAKES [ABS 5.31 TYPE]
8. Diagnostics Chart with Trouble Code by ABS Warning Light
Except OUTBACK model
8E3 I CHECK BATTERY SHORT OF ABS SENSOR .
1) Turn ignition switch to ON .
M112 2) Measure voltage between ABS sensor and chassis
ground .
Terminal
Front RH No. 1 (+) - Chassis ground ():
L21 V Front LH No. 1 (+) - Chassis ground ():
Rear RH No. 1 (+) - Chassis ground (-) :
B4MOB07E Rear LH No. 1 (+) - Chassis ground ():
CHECK : Is the voltage less than 1 V?
OUTBACK model
vES : Go to step 8E4.
Front Rear No : Replace ABS sensor.
DI
1 2 2 1
D
-_
_v B4M1037C
8E4 CHECK ETWEEN
ABSCM&HU AND,ABS SENSOR .
1) Turn ignition switch to OFF .
2) Connect connector to ABS sensor.
3) Measure resistance between ABSCM&H/U connector
terminals.
Connector & terminal
Trouble code 21 / (F49) No. 11 - No. 12:
Trouble code 23 / (F49) No. 9 - No. 10 :
Trouble code 25 l (F49) No. 14 - No. 15:
Trouble code 27 l (F49) No. 7 - No. 8:
CHECK : Is the resistance between 0.8 and 1 .2 kSZ?
vES : Go to step 8E5 .
No : Repair harness/connector between ABSCM&H/U
and ABS sensor.
34
BRAKES [ABS 5.31 TYPE] [r8E71 4-4d
8. Diagnostics Chart with Trouble Code by ABS Warning Light
fCHECK BATTERY SHORT OF HARNESS.
Measure voltage between ABSCM&H/U connector and
chassis ground .
Connector & terminal
Trouble code 21 I (F49) No. 11 (+) - Chassis ground
Trouble code 23 l (F49) No. 9 (+) - Chassis ground
Trouble code 25 l (F49) No. 14 (+) - Chassis ground
Trouble code 27 / (F49) No . 7 (+) - Chassis ground
(-):
CHECK : Is the voltage less than 1 V?
ves : Go to step 8E6.
No : Repair harness between ABSCM&H/U and ABS
sensor.
F49 18E6 I CHECK BATTERY SHORT OF HARNESS.
1) Turn ignition switch to ON .
2) Measure voltage between ABSCM&H/U connector and
chassis ground .
Connector & terminal
Trouble code 21 / (F49) No. 11 (+) - Chassis ground
Trouble code 23 l (F49) No. 9 (+) - Chassis ground
B4M 1240A 'I
Trouble code 25 l (F49) No. 14 (+) - Chassis ground
Trouble code 27 / (F49) No . 7 (+) - Chassis ground
CHECK : Is the voltage less than 1 V?
ves : Go to step 8E7.
No : Repair harness between ABSCM&H/U and ABS
sensor.
8E7 CHECK INSTALLATION OF ABS SENSOR .
Tightening torque:
32 f 10 N~m (3.3 f 1 .0 kg-m, 24 f 7 ft-Ib)
CHECK : Are the ABS sensor installation bolts tight-
ened securel y?
vES : Go to step 8E8.
No : Tighten ABS sensor installation bolts securely .
35
4-4d [TSES1 BRAKES [ABS 5.31 TYPE]
8. Diagnostics Chart with Trouble Code by ABS Warning Light
8E8 CHECK INSTALLATION OF TONE WHEEL.
I
Tightening torque:
13 f 3 N~m (1.3 f 0.3 kg-m, 9 f 2.2 ft-Ib)
CHECK : Are the tone wheel installation bolts tight-
ened securely?
,rES : Go to step 8E9.
No : Tighten tone wheel installation bolts securely .
8E9 CHECK ABS SENSOR GAP.
I
Measure tone wheel-to-pole piece gap over entire perim-
eter of the wheel .
CHECK ; Is the gap within the specifications shown in
the following table?
Front wheel Rear wheel
Sensor gap Specifications 0 .9 - 1 .4 mm 0 .7 - 1 .2 mm
G4M0700 I (0.035 - 0 .055 in) (0 .028 - 0 .047 in)
ves : Go to step 8E10 .
Rear
No : Adjust the gap .
NOTE :
Adjust the gap using spacers (Part No. 26755AA000) . If
spacers cannot correct the gap, replace worn sensor or
worn tone wheel.
Sensor gap
G4M0701
8E10 CHECK HUB RUNOUT.
Measure hub runout.
CHECK : Is the runouf less than 0.05 mm (0 .0020 in)?
vES : Go to step 8E11 .
No : Repair hub.
36
BRAKES [ABS 5.3i TYPE] [T8E13] 4-4d
8. Diagnostics Chart with Trouble Code by ABS Warning Light
Except OUTBACK model CHECK GROUND SHORT OF ABS SENSOR .
1) Turn ignition switch to ON .
1 2 2) Measure resistance between ABS sensor and chassis
ground .
Terminal
Front RH No. 1 - Chassis ground:
L D Front LH No. 1 - Chassis ground:
S2 Rear RH No. 1 - Chassis ground:
B4M0818E Rear LH No. 1 - Chassis ground:
CHECK : Is the resistance more than 1 MS2?
OUTBACK model
,rES : Go to step 8E12.
Front Rear No : Replace ABS sensor and ABSCM&H/U .
JT~
1 2
L 2 2 1
B4M1042C
CHECK GROUND SHORT OF HARNESS .
1) Turn ignition switch to OFF .
2) Connect connector to ABS sensor.
3) Measure resistance between ABSCM&H/U connector
terminal and chassis ground .
Connector & terminal
Trouble code 21 I (F49) No . 11 - Chassis ground:
Trouble code 23 l (F49) No. 9 - Chassis ground:
Trouble code 25 I (F49) No . 14 - Chassis ground:
Trouble code 27 / (F49) No. 7 - Chassis ground:
CHECK ; Is the resistance more than 1 MS2?
,rES : Go to step 8E13.
No : Repair harness between ABSCM&H/U and ABS
sensor .
Replace ABSCM&H/U .
(CHECK POOR CONTACT IN CONNECTORS .
CHECK : Is there poor contact in connectors between
ABSCM&HIU and ABS sensor? < Ref. to
FOREWORD [T3C1] .*10 >
vES : Repair connector.
No : Go to step 8E14 .
37
4-4d [T8E14] BRAKES [ABS 5 .31 TYPE]
8. Diagnostics Chart with Trouble Code by ABS Warning Light
-
f 8E14 CHECK ABSCM&H/U.
I
1) Connect all connectors .
2) Erase the memory.
3) Perform inspection mode .
4) Read out the trouble code .
CHECK : Is the same trouble code as in the current
diagnosis still being output?
ves : Replace ABSCM&H/U.
No : Go to step 8E15 .
I8E1 5 CHECK ANY .THER TROUBLE CODES
IAPPEARANCE
Are other trouble codes being output?
Proceed with the diagnosis corresponding to the
trouble code.
No : A temporary poor contact.
NOTE :
Check harness and connectors between ABSCM&H/U
and ABS sensor .
38
4-4d [TSFO] BRAKES [ABS 5.31 TYPE]
8. Diagnostics Chart with Trouble Code by ABS Warning Light
F: TROUBLE CODE 22 (FRONT RH)
G : TROUBLE CODE 24 (FRONT LH)
H : TROUBLE CODE 26 (REAR RH)
I: TROUBLE CODE 28 (REAR LH)
- ABNORMAL ABS SENSOR (ABNORMAL
ABS SENSOR SIGNAL) -
DIAGNOSIS :
" Faulty ABS sensor signal (noise, irregular signal, etc .)
Faulty harness/connector
TROUBLE SYMPTOM:
9 ABS does not operate.
WIRING DIAGRAM :
f49
_-^ B15
~ B~~ _____===_-r m--~~ Front ABS
~ sensor LH
---- -----------
--- Front ABS
-
----------- [Z1-1 ~ sensor RH
ABS Twisted ~-
control wire F1 Pt O O
module
and Rear ABS
hydraulic sensor LH
control
unit ~ :M
: Twisted wire
RearABS
sensor RH
I OUTBACK with step roof model I
I ~ I
RearABS
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