key SUBARU LEGACY 1997 Service Repair Manual

B4M0730A
1. CHECK RESISTANCE OF MOTOR RELAY.
1) Turn ignition switch OFF.
2) Remove motor relay.
3) Measure resistance between motor relay terminals.
Terminal / Specified resistance:
No. a—b/57Ω
NOTE:
Apply + to b terminal.
Apply to a terminal.
B4M0451A
2. CHECK INPUT VOLTAGE OF MOTOR RELAY.
1) Turn ignition switch OFF.
2) Disconnect motor relay.
3) Measure voltage between motor relay connector and
body.
Connector & terminal / Specified voltage:
(F10) No. 1—body / 10—13 V
(F10) No. 3—body/0V
4) Turn ignition switch ON.
5) Measure voltage between motor relay connector and
body.
Connector & terminal / Specified voltage:
(F10) No. 1—body / 10—13 V
(F10) No. 3—body / 10—13 V (In 1 second after
turning ignition key ON.)
B4M0452A
3. CHECK BODY SHORT OF HARNESS.
1) Turn ignition switch OFF.
2) Disconnect motor relay.
3) Disconnect ABS/TCS control module.
4) Measure resistance between ABS/TCS control module
connector and body.
Connector & terminal / Specified resistance:
(P6) No. 9—body/1MΩor more
68
4-4bBRAKES
8. Diagnostics Chart with Trouble Code

B4M0733A
3. CHECK GROUND SHORT OF HARNESS.
1) Turn ignition switch OFF.
2) Remove No. 18 fuse from fuse and joint box.
3) Disconnect ABS/TCS control module connectors.
4) Measure resistance between ABS/TCS control module
connector and body.
Connector & terminal / Specified resistance:
(P5) No. 1—body/1MΩor more
B4M0405A
4. CHECK GROUND CIRCUIT OF ABS/TCS CONTROL
MODULE.
1) Turn ignition switch OFF.
2) Disconnect connector from ABS/TCS control module.
3) Measure resistance between ABS/TCS control module
connector and body.
Connector & terminal / Specified resistance:
(P4) No. 6—body / 1Ωor less
(P5) No. 5—body / 1Ωor less
(P7) No. 15—body / 1Ωor less
5. CHECK GENERATOR FUNCTION.
1) When the ignition key is at OFF, check the charge warn-
ing light is off.
2) Turn the key ON and ensure the light comes on.
3) Keep the engine running at idle and ensure the light
goes off.
B4M0473A
B4M0395A
6. CHECK INPUT VOLTAGE OF ABS/TCS CONTROL
MODULE.
1) Turn ignition switch OFF.
2) Disconnect ABS/TCS control module connectors.
3) Turn ignition switch ON.
4) Measure voltage between ABS/TCS control module
connector and body.
Connector & terminal / Specified voltage:
(P7) No. 20—body/2Vorless (Engine OFF)
(P7) No. 20—body / 10—14 V (Engine idling)
(P5) No. 1—body / 10—13 V (Engine OFF)
80
4-4bBRAKES
8. Diagnostics Chart with Trouble Code

B4M0485
K: MODE FC0
—CLEAR MEMORY MODE (D⋅CLR)—

Deletes the recorded trouble codes in ABS/TCS control
module.
B4M0736
1) Use function keys to put inFCOENT.
B4M0487
2) System indicates as shown.
B4M0488
3) Key in 0, to clear memories. The indication ofis
added to screen.
B4M0489
4) Key in ENT. System indicates as shown.
5) Turn the key OFF.
92
4-4bBRAKES
9. Select Monitor Function Mode

B: CHECK LIST FOR INTERVIEW
Check the following items about the vehicle’s state.
1. THE STATE OF THE WARNING LIGHTS
a. ABS warning light

1Is always on.2Sometimes comes on.3Comes on only once.4Does not come on.
When/how long does it come on?
Ignition key
position
1Lock2Acc3On (before starting engine)4Start5On after starting (Engine: run)
6On after starting (Engine: stop)
Timing
1Immediately after ignition is on.2Immediately after ignition starts.
3When advancing (Speedmiles/h,miles/h)4While traveling at a constant speed (Speedmiles/h)
5When decelerating (Speedmiles/h,miles/h)
6When turning (To right, to left, steering angledeg., steering timesec)
7When moving other electrical parts (Part name:, Operating condition)
2. SYMPTOMS
ABS operating
condition1Performs no work.2Operates only when abruptly applying brakes. (Conditions: vehicle speedmiles/h, how to step
on brake pedal)
3Operating time (sec., etc.)4Operating noise (Produced/Not produced)
5What kind of noise? (Knock, gong gong, bong, buzz, gong gong buzz, etc.)
6Reaction force of brake pedal (Stick, pressed down once with a clunk, pressed and released, etc.)
Behavior of
vehicle
1Directional stability cannot be obtained or steering arm refuses to work when applying brakes (vehicle turns to right, turns
to left, spins, etc.).
2Directional stability cannot be obtained or steering arm refuses to work when accelerating (vehicle turns to right, turns to
left, spins, etc.).
3Brakes are out of order (braking distance is long, brakes lock or drag, pedal stroke is long, pedal sticks, etc.).
4Poor acceleration (fails to accelerate, engine stalls, etc.).
5Vibration, abnormal noise (operating noise is loud, noise is produced during operation from the front of vehicle (right, left)
(tones:), noise is produced during operation from the rear of vehicle (tones:, others)
6Other phenomena (concrete symptoms)
3. CONDITIONS UNDER WHICH TROUBLE OCCURS
Environment1Weather (fine, cloudy, rain, snow, etc.)
2Ambient temperature (°C/°F)
3Road (urban area, suburbs, highway, general road, ascending slope, descending slope, paved road, gravel road, muddy
road, sandy place, etc.)
4Road surface (dry, wet, new-fallen snow, compressed snow, frozen slope, etc.)
Conditions
1Brakes (decelerationg, continuous/intermittent)2Accelerator (accelerationg, continuous/intermittent)
3Travel speed (miles, advancing, accelerating, reducing speed, low speed, turning, etc.)
4Condition of tire of each wheel (air pressure, degree of wear, whether or not genuine parts are used, whether
or not chain is passed around tires, whether or not T tire is used.) others ()
5Condition of suspension alignment ()
6Loading state ()
4. REPAIRED PARTS ARE USED OR NOT
11
4-4cBRAKES [ABS 5.3 TYPE]
6. Diagnostics Chart for On-board Diagnosis System

B4M0930
J: MODE FC0
—HISTORY OF TROUBLE CODES IS
ERASED (D⋅CLR)—

Deletes the recorded trouble codes in ABS control mod-
ule.
B4M0931
1) Use function keys to put inFCOENT.
B4M0930
2) System indicates as shown.
B4M0933
3) Key in 0, to clear memories. The indication of * is added
to screen.
B4M0934
4) Key in ENT. System indicates as shown.
5) Turn the key OFF.
11 8
4-4cBRAKES [ABS 5.3 TYPE]
9. Select Monitor Function Mode

B4M0977
10AH5
CHECK FREEZE FRAME DATA.
1) Press
F,
Eand
5on the select monitor.
: Is the reading indicated on monitor display
0 km?
: Go to next step.
: Go to step10AH9.
B4M0978
2) Press the scroll key so that FE6 appears on the moni-
tor display.
: Is the reading indicated on monitor display
0 km?
: Go to next step.
: Go to step10AH9.
B4M0979
3) Press the scroll key so that FE7 appears on the moni-
tor display.
: Is the reading indicated on monitor display
0 km?
: Go to next step.
: Go to step10AH9.
B4M0980
4) Press the scroll key so that FE8 appears on the moni-
tor display.
: Is the reading indicated on monitor display
0 km?
: Go to next step.
: Go to step10AH9.
B4M0981
5) Press the scroll key so that FE14 appears on the moni-
tor display.
: Is the reading indicated on monitor display
greater than 3.65 V?
: Go to step10AH6.
: Go to step10AH9.
253
4-4cBRAKES [ABS 5.3 TYPE]
10. Diagnostics Chart with Select Monitor

When ABS warning light illuminates, read and record
trouble code indicated by ABS warning light.
B: CHECK LIST FOR INTERVIEW
Check the following items about the vehicle’s state.
1. THE STATE OF THE ABS WARNING LIGHT
ABS warning light
comes on.Always
Sometimes
Only once
Does not come on

When /how long does it come on?:
Ignition key positionLOCK
ACC
ON (before starting engine)
START
On after starting (Engine is running)
On after starting (Engine is stop)
TimingImmediately after ignition is ON.
Immediately after ignition starts.
When advancing km/h to km/h
MPH to MPH
While traveling at a constant speed km/h MPH
When decelerating km/h to km/h
MPH to MPH
When turning to right Steering angle : deg
Steering time : sec
When turning to left Steering angle : deg
Steering time : sec
When moving other electrical parts

Parts name :

Operating condition :
2. SYMPTOMS
ABS operating
conditionPerforms no work.
Operates only when abruptly applying brakes. Vehicle speed : km/h
MPH

How to step on brake pedal :
a) Operating time :sec
b) Operating noise :Produce /Does not produce

What kind of noise?Knock
Gong gong
Bong
Buzz
Gong gong buzz
Others :
c) Reaction force of brake pedal
Stick
Press down once with a clunk
Press and released
Others :
11
4-4dBRAKES [ABS 5.3i TYPE]
6. Diagnostics Chart for On-board Diagnosis System

B4M0930
J: MODE FC0
—HISTORY OF TROUBLE CODES IS
ERASED (D⋅CLR)—

Deletes the recorded trouble codes in ABS control mod-
ule.
B4M0931
1) Press the function key [F] [C] [O] [ENT] in that order.
B4M0930
2) System indicates as shown.
B4M0933
3) Press the function key [0], to clear memories. The indi-
cation of
is added to screen.
B4M0934
4) Press the function key [ENT]. System indicates as
shown.
5) Turn ignition switch to OFF.
86
4-4dBRAKES [ABS 5.3i TYPE]
9. Select Monitor Function Mode

B4M0977
10AG6
CHECK FREEZE FRAME DATA.
1) Press [F], [E] and [5] on the select monitor.
2) Read the select monitor display.
: Is the reading indicated on monitor display
0 km?
: Go to step10AG7.
: Go to step10AG15.
B4M0978
10AG7
CHECK FREEZE FRAME DATA.
1) Press the scroll key so that FE6 appears on the moni-
tor display.
2) Read the select monitor display.
: Is the reading indicated on monitor display
0 km?
: Go to step10AG8.
: Go to step10AG15.
B4M0979
10AG8
CHECK FREEZE FRAME DATA.
1) Press the scroll key so that FE7 appears on the moni-
tor display.
2) Read the select monitor display.
: Is the reading indicated on monitor display
0 km?
: Go to step10AG9.
: Go to step10AG15.
B4M0980
10AG9
CHECK FREEZE FRAME DATA.
1) Press the scroll key so that FE8 appears on the moni-
tor display.
2) Read the select monitor display.
: Is the reading indicated on monitor display
0 km?
: Go to step10AG10.
: Go to step10AG15.
B4M0981
10AG10
CHECK FREEZE FRAME DATA.
1) Press the scroll key so that FE14 appears on the moni-
tor display.
2) Read the select monitor display.
: Is the reading indicated on monitor display
more than 3.65 V?
: Go to step10AG11.
: Go to step10AG15.
166
4-4dBRAKES [ABS 5.3i TYPE]
10. Diagnostics Chart with Select Monitor

10) Relays are classified as normally-open or normally-
closed.
The normally-closed relay has one or more contacts.
The wiring diagram shows the relay mode when the ener-
gizing circuit is OFF.
G6M0204
Key to symbols:
→: Current flows.
X→: Current does not flow.
6
6-3WIRING DIAGRAM
1. General Description