1997 SUBARU LEGACY Service Repair Manual

Page 2641 of 3342

SUBARU LEGACY 1997  Service Repair Manual G4M0700
1) Measure tone wheel to pole piece gap over entire
perimeter of the wheel.
: Is the gap within the specifications shown
in the following table?
SpecificationsFront wheel Rear wheel
0.9—1.4

Page 2642 of 3342

SUBARU LEGACY 1997  Service Repair Manual 9) Connect connector to ABS control module.
10) Connect the oscilloscope to the ABS control module
connector in accordance with trouble code.
11) Turn ignition switch ON.
B4M0816A
12) Rotate wheels an

Page 2643 of 3342

SUBARU LEGACY 1997  Service Repair Manual B4M0806B
B4M1036A
8C2
CHECK RESISTANCE OF ABS SENSOR.
1) Turn ignition switch OFF.
2) Disconnect connector from ABS sensor.
3) Measure resistance between ABS sensor connector ter-
minals.
: Trouble co

Page 2644 of 3342

SUBARU LEGACY 1997  Service Repair Manual B4M0809A
8C4CHECK HARNESS CONNECTOR
BETWEEN ABSCM AND ABS SENSOR.
1) Connect connector to ABS sensor.
2) Disconnect connector from ABS control module.
3) Measure resistance at ABSCM connector terminal

Page 2645 of 3342

SUBARU LEGACY 1997  Service Repair Manual 8C7CHECK POOR CONTACT IN CONNEC-
TOR BETWEEN ABSCM AND ABS SEN-
SOR.
: Is there poor contact in connectors between
ABSCM and ABS sensor?
: Repair connector.
: Go to step8C8.
8C8
CHECK SOURCES OF SIGNA

Page 2646 of 3342

SUBARU LEGACY 1997  Service Repair Manual 8C10
CHECK ABSCM.
1) Connect all connectors.
2) Erase the memory.
3) Perform inspection mode.
4) Read out the trouble code.
: Is the same trouble code as in the current
diagnosis still being output?
:

Page 2647 of 3342

SUBARU LEGACY 1997  Service Repair Manual D: TROUBLE CODE 29
—ABNORMAL ABS SENSOR SIGNAL (ANY
ONE OF FOUR)—
DIAGNOSIS:
Faulty ABS sensor signal (noise, irregular signal, etc.)
Faulty tone wheel
Wheels turning freely for a long time
TRO

Page 2648 of 3342

SUBARU LEGACY 1997  Service Repair Manual WIRING DIAGRAM:
B4M1035
8D1CHECK IF THE WHEELS HAVE TURNED
FREELY FOR A LONG TIME.
: Check if the wheels have been turned freely
for more than one minute, such as when the
vehicle is jacked-up, under