Locks SUBARU LEGACY 1996 Service User Guide

G3M0151
6) After the display is gone, turn Subaru select monitor
switch and ignition switch to OFF.
NOTE:
When the ECM, battery terminals, etc. are disconnected
after memory is cleared, idling speed may increase. This is
not considered a problem because the ISC valve duty con-
trolled learning value has been cleared. To return the
engine to idling speed, idle for approximately 2 minutes
with air conditioner off.
2. OBD-II GENERAL SCAN TOOL
For clear memory procedures using the OBD-II general
scan tool, refer to the OBD-II General Scan Tool Instruction
Manual.
OBD0072A
E: INSPECTION MODE
1. PREPARATIONS FOR THE INSPECTION MODE
Raise the vehicle using a garage jack and place on safety
stands or drive the vehicle onto free rollers.

FULL-TIME AWD MODELS
WARNING:

Before raising the vehicle, ensure parking brakes
are applied.

Do not use a pantograph jack in place of a safety
stand.

Secure a rope or wire to the front and rear towing or
tie-down hooks to prevent the lateral runout of front
wheels.

Do not abruptly depress/release clutch pedal or
accelerator pedal during works even when engine is
operating at low speeds since this may cause vehicle
to jump off free rollers.

In order to prevent the vehicle from slipping due to
vibration, do not place any wooden blocks or similar
items between the safety stands and the vehicle.
58
2-7ON-BOARD DIAGNOSTICS II SYSTEM
3. Diagnosis System

Since the rear wheels will also rotate, do not place
anything near them. Also, make sure that nobody goes
in front of the vehicle.
OBD0073A

FWD MODELS
WARNING:

Before raising the vehicle, ensure parking brakes
are applied.

Do not use a pantograph jack in place of a safety
stand.

If only the front wheels are raised or placed on a free
roller, apply parking brakes and lock the rear wheels.

Secure a rope or wire to the front and rear towing or
tie-down hooks to prevent the lateral runout of front
wheels.

Do not abruptly depress/release clutch pedal or
accelerator pedal during works even when engine is
operating at low speeds since this may cause vehicle
to jump off free rollers.

In order to prevent the vehicle from slipping due to
vibration, do not place any wooden blocks or similar
items between the safety stands and the vehicle.

Since the rear wheels will also rotate, do not place
anything near them. Also, make sure that nobody goes
in front of the vehicle.
OBD0057A
2. SUBARU SELECT MONITOR
After performing diagnostics and clearing the memory,
check for any remaining unresolved trouble data.
1) Prepare Subaru select monitor and cartridge.
ST1 498307500 SELECT MONITOR KIT
ST2 498345700 CARTRIDGE
G3M0151
2) Turn ignition switch and Subaru select monitor switch to
OFF.
59
2-7ON-BOARD DIAGNOSTICS II SYSTEM
3. Diagnosis System

WIRING DIAGRAM:
B4M1034
7B1CHECK INSTALLATION OF ABSCM CON-
NECTOR.
Turn ignition switch to OFF.
: Is ABSCM connector inserted into ABSCM
until the clamp locks onto it?
: Go to step7B2.
: Insert ABSCM connector into ABSCM until the
clamp locks onto it.
19
4-4cBRAKES [ABS 5.3 TYPE]
7. Diagnostics Chart for ABS Warning Light Circuit and Diagnosis Circuit Failure

B4M0430
10C1
CHECK GENERATOR.
1) Start the engine.
2) Idle the engine.
3) Measure voltage between generator and chassis
ground.
: Terminal
Generator B terminal (+)—Chassis ground
():
Is voltage 10—15 V?
: Go to step10C2.
: Repair generator.
10C2
CHECK BATTERY TERMINAL.
Turn ignition switch to OFF.
: Is there poor contact at battery terminal?
: Repair battery terminal.
: Go to step10C3.
10C3CHECK COMMUNICATION OF SELECT
MONITOR.
Using the select monitor, check whether communication to
other system (such as engine, AT, etc.) can be executed
normally.
: Are the name and year of the system dis-
played on the select monitor?
: Go to step10C4.
: Repair select monitor communication cable and
connector.
10C4CHECK INSTALLATION OF ABSCM CON-
NECTOR.
Turn ignition switch to OFF.
: Is ABSCM connector inserted into ABSCM
until the clamp locks onto it?
: Go to step10C5.
: Insert ABSCM connector into ABSCM until the
clamp locks onto it.
127
4-4cBRAKES [ABS 5.3 TYPE]
10. Diagnostics Chart with Select Monitor

11. General Diagnostics Table
A: SYMPTOMS AND PROBABLE CAUSES
Symptom Probable faulty units/parts
Vehicle instability during brakingVehicle pulls to either side.
Hydraulic unit (solenoid valve)

ABS sensor

Brake (caliper & piston, pads)

Wheel alignment

Tire specifications, tire wear and air pressures

Incorrect wiring or piping connections

Road surface (uneven, camber)
Vehicle spins.
Hydraulic unit (solenoid valve)

ABS sensor

Brake (pads)

Tire specifications, tire wear and air pressures

Incorrect wiring or piping connections
Poor brakingLong braking/stopping distance
Hydraulic unit (solenoid valve)

Brake (pads)

Air in brake line

Tire specifications, tire wear and air pressures

Incorrect wiring or piping connections
Wheel locks.
Hydraulic unit (solenoid valve, motor)

ABS sensor

Incorrect wiring or piping connections
Brake dragging
Hydraulic unit (solenoid valve)

ABS sensor

Master cylinder

Brake (caliper & piston)

Parking brake

Axle & wheels

Brake pedal play
Long brake pedal stroke
Air in brake line

Brake pedal play
Vehicle pitching
Suspension play or fatigue (reduced damping)

Incorrect wiring or piping connections

Road surface (uneven)
Unstable or uneven braking
Hydraulic unit (solenoid valve)

ABS sensor

Brake (caliper & piston, pads)

Tire specifications, tire wear and air pressures

Incorrect wiring or piping connections

Road surface (uneven)
Vibration and/or noise (while
driving on slippery roads)Excessive pedal vibration
Incorrect wiring or piping connections

Road surface (uneven)
Noise from hydraulic unit
Hydraulic unit (mount bushing)

ABS sensor

Brake piping
Noise from front of vehicle
Hydraulic unit (mount bushing)

ABS sensor

Master cylinder

Brake (caliper & piston, pads, rotor)

Brake piping

Brake booster & check valve

Suspension play or fatigue
Noise from rear of vehicle
ABS sensor

Brake (caliper & piston, pads, rotor)

Parking brake

Brake piping

Suspension play or fatigue
272
4-4cBRAKES [ABS 5.3 TYPE]
11. General Diagnostics Table

24) Turn ignition switch“OFF”, disconnect battery ground cable,
and wait 20 seconds. Remove driver side airbag module and
connect test harness C connector (1C) to (AB7) [W3A1].> with airbag resistor attached to test harness C con-
nector (3C).
G5M0430
25) Reconnect battery ground cable and turn ignition switch“ON”. Does airbag warning light go“OFF”after 8 seconds and remain off
for more than 30 seconds? See notes 1) and 2). (Refer to end of chart.) If“YES”, proceed to step 26). If“NO”, proceed to step
27).
26) Turn ignition switch“OFF”, disconnect battery ground cable, and wait 20 seconds. Install driver side airbag module [W3B0].> and proceed to step 27).
27) Replace combination switch, and proceed to step 26).
28) Reconnect battery and turn ignition switch“ON”. Does airbag warning light go off after 8 seconds and remain off for more than 30
seconds? See notes 1) and 2). (Refer to end of chart.) If“YES”, proceed to step 29). If“NO”, proceed to step 31).
29) Perform clear memory procedure.
30) If memory cannot be cleared, another trouble code exists. Return to step 1).
31) Turn ignition switch“OFF”, disconnect battery ground cable, and wait 20 seconds. Replace driver side airbag module. 5-5 [W3A1].> Proceed to step 28).
NOTES:
1) Always remember to secure the green double locks before turning the ignition switch “ON”.
2) In some cases the airbag warning light will go “OFF” after 8 seconds but will turn “ON” again within 30 seconds. In this
case continue diagnostics with the basic diagnostics procedures or trouble code procedures.
14
5-5SUPPLEMENTAL RESTRAINT SYSTEM
4. Diagnostics Chart for On-board Diagnostic System

G5M0589
11) Turn ignition switch“OFF”, disconnect battery ground
cable, and wait 20 seconds. Disconnect passenger side
airbag module connector (AB9) to (AB10). [W3A2].>
Connect test harness C connector (1C) to (AB9). Connect
airbag resistor to test harness C connector (3C).
Connect battery ground cable and turn ignition switch
“ON”. Does airbag warning light go“OFF”after 8 seconds
and remain off for more than 30 seconds?
See“NOTE:”.
If“YES”proceed to step 12).
If“NO”proceed to step 3).
12) Turn ignition switch“OFF”, disconnect battery ground
cable, and wait 20 seconds. Replace with a new passen-
ger side airbag module then pro-
ceed to step 15).
13) Turn ignition switch“OFF”, disconnect battery ground
cable and wait 20 seconds. Replace with a new passenger
side airbag module then proceed
to step 7).
14) Turn ignition switch“OFF”, disconnect battery ground
cable, and wait 20 seconds. Replace with a new combina-
tion switch, and install driver side
airbag module .
Connect battery ground cable and turn ignition switch
“ON”. Does airbag warning light go“OFF”after 8 seconds
and remain off for more than 30 seconds?
See“NOTE:”.
If“YES”proceed to step 16).
If“NO”proceed to step 9).
15) Connect battery ground cable and turn ignition switch
“ON”. Does airbag warning light go“OFF”after 8 seconds
and remain off for more than 30 seconds? See“NOTE:”.
If“YES”proceed to step 16).
If“NO”proceed to step 1).
16) Perform clear memory procedure. [T4C0].>
If memory cannot be cleared, another trouble code exists.
Return to step 1).
If memory can be cleared, proceed to step 17).
17) END
NOTE:
Always remember to secure the green double locks
before turning the ignition switch“ON”.
In some cases the airbag warning light will go“OFF”
after 8 seconds but will turn“ON”again within 30 seconds.
In this case continue diagnostics with the basic diagnostics
procedures or trouble code procedures.
15
5-5bSUPPLEMENTAL RESTRAINT SYSTEM (ELECTRIC SENSOR TYPE)
4. Diagnostics Chart for On-board Diagnostic System