high voltage SUBARU LEGACY 1997 Service Owner's Guide

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:
B4M1238
28
4-4dBRAKES [ABS 5.3i TYPE]
8. Diagnostics Chart with Trouble Code by ABS Warning Light

T: TROUBLE CODE 42
—SOURCE VOLTAGE IS ABNORMAL.—
DIAGNOSIS:

Power source voltage of the ABSCM&H/U is low or high.
TROUBLE SYMPTOM:

ABS does not operate.
WIRING DIAGRAM:
B4M1245
56
4-4dBRAKES [ABS 5.3i TYPE]
8. Diagnostics Chart with Trouble Code by ABS Warning Light

B: LIST OF TROUBLE CODE
Code Display screen (FB1) Contents of diagnosis Ref. to
—ERROR 3 (1) Select monitor communication failure 4-4d [T10C0]
11 NO TROUBLEAlthough no trouble appears on the select monitor display, the ABS
warning light remains on.4-4d [T10D0]
21 FR. SS HARD Open circuit or input voltage too high of FR sensor 4-4d [T10E0]
22 FR. SS SOFT Abnormal ABS sensor signal of FR sensor 4-4d [T10I0]
23 FL. SS HARD Open circuit or input voltage too high of FL sensor 4-4d [T10F0]
24 FL. SS SOFT Abnormal ABS sensor signal of FL sensor 4-4d [T10J0]
25 RR. SS HARD Open circuit or input voltage too high of RR sensor 4-4d [T10G0]
26 RR. SS SOFT Abnormal ABS sensor signal of RR sensor 4-4d [T10K0]
27 RL. SS HARD Open circuit or input voltage too high of RL sensor 4-4d [T10H0]
28 RL. SS SOFT Abnormal ABS sensor signal of RL sensor 4-4d [T10L0]
29 EITHER. SS SOFT Abnormal ABS sensor signal (any one of four) 4-4d [T10M0]
31 FR. EV VALVE Abnormal FR inlet valve 4-4d [T10N0]
32 FR. AV VALVE Abnormal FR outlet valve 4-4d [T10R0]
33 FL. EV VALVE Abnormal FL inlet valve 4-4d [T10O0]
34 FL. AV VALVE Abnormal FL outlet valve 4-4d [T10S0]
35 RR. EV VALVE Abnormal RR inlet valve 4-4d [T10P0]
36 RR. AV VALVE Abnormal RR outlet valve 4-4d [T10T0]
37 RL. EV VALVE Abnormal RL inlet valve 4-4d [T10Q0]
38 RL. AV VALVE Abnormal RL outlet valve 4-4d [T10U0]
41 ECU Abnormal ABSCM&H/U 4-4d [T10V0]
42LOW VOLTAGE Source voltage is low. 4-4d [T10W0]
HIGH VOLTAGE Source voltage is high. 4-4d [T10X0]
44CCM LINE A combination of AT control abnormals (ABS not in control) 4-4d [T10Y0]
CCM OPEN A combination of AT control abnormals (ABS in control) 4-4d [T10Z0]
51V. RELAY Abnormal valve relay 4-4d [T10AA0]
V. RELAY ON Valve relay ON failure 4-4d [T10AB0]
52M. RELAY OPEN Open circuit of motor relay 4-4d [T10AC0]
M. RELAY ON Motor relay ON failure 4-4d [T10AD0]
MOTOR Abnormal motor 4-4d [T10AE0]
54 BLS Abnormal stop light switch 4-4d [T10AF0]
56G SENSOR LINE Open or short circuit of G sensor 4-4d [T10AG0]
G SENSOR +B Battery short of G sensor 4-4d [T10AH0]
G SENSOR H µ Abnormal G sensor high µ output 4-4d [T10AI0]
G SENSOR STICK G sensor output is stuck. 4-4d [T10AJ0]
NOTE:
High µ means high friction coefficient against road sur-
face.
91
4-4dBRAKES [ABS 5.3i TYPE]
10. Diagnostics Chart with Select Monitor

B4M0945
E: TROUBLE CODE 21 FR. SS HARD
—ABNORMAL FRONT RH ABS SENSOR
(OPEN CIRCUIT OR INPUT VOLTAGE TOO
HIGH)—
B4M0946
F: TROUBLE CODE 23 FL. SS HARD
—ABNORMAL FRONT LH ABS SENSOR
(OPEN CIRCUIT OR INPUT VOLTAGE TOO
HIGH)—
B4M0947
G: TROUBLE CODE 25 RR. SS HARD
—ABNORMAL REAR RH ABS SENSOR
(OPEN CIRCUIT OR INPUT VOLTAGE TOO
HIGH)—
B4M0948
H: TROUBLE CODE 27 RL. SS HARD
—ABNORMAL REAR LH ABS SENSOR
(OPEN CIRCUIT OR INPUT VOLTAGE TOO
HIGH)—
99
4-4dBRAKES [ABS 5.3i TYPE]
10. Diagnostics Chart with Select Monitor

DIAGNOSIS:

Faulty ABS sensor (Broken wire, input voltage too high)

Faulty harness connector
TROUBLE SYMPTOM:

ABS does not operate.
WIRING DIAGRAM:
B4M1238
100
4-4dBRAKES [ABS 5.3i TYPE]
10. Diagnostics Chart with Select Monitor

B4M1268
X: TROUBLE CODE 42 LOW VOLTAGE
—SOURCE VOLTAGE IS HIGH—
DIAGNOSIS:

Power source voltage of the ABSCM&H/U is high.
TROUBLE SYMPTOM:

ABS does not operate.
WIRING DIAGRAM:
B4M1245
138
4-4dBRAKES [ABS 5.3i TYPE]
10. Diagnostics Chart with Select Monitor

B4M0984
AI: TROUBLE CODE 56 G SENSOR Hµ
—ABNORMAL G SENSOR HIGH µ OUTPUT
—
DIAGNOSIS:

Faulty G sensor output voltage
TROUBLE SYMPTOM:

ABS does not operate.
WIRING DIAGRAM:
B4M1260
174
4-4dBRAKES [ABS 5.3i TYPE]
10. Diagnostics Chart with Select Monitor