1997 SUBARU LEGACY check engine light

F: TCS SEQUENCE CONTROL
1) Under the TCS sequence control, after the hydraulic
unit solenoid valve is driven, the operation of the hydraulic
unit can be checked by means of the brake tester or pres-
sure gauge.
2) TCS sequence control can be started by diagnosis con-
nector or select monitor.
B4M0082C
1. OPERATIONAL GUIDELINES OF THE TCS
SEQUENCE CONTROL WITH DIAGNOSIS
CONNECTOR
1) Connect diagnosis terminals to terminal No. 4 of the
diagnosis connector beside driver seat heater unit.
2) Ignition switch is turned to ON.
3) Make sure only the start code (code 11) is shown in
normal condition.
NOTE:
When trouble codes are stored in memory, repair the faulty
parts.
4) Set the speed of all wheels at 10 km/h (6 MPH) or less.
5) Turn ignition switch OFF.
6) Start engine, and within 0.5 seconds after the ABS
warning light and TCS warning light go out, press TCS OFF
switch. Within 1.0 second thereafter, release and press the
switch again. Then, keep the switch pressed.
NOTE:

When the TCS sequence control is set to on, the brake
pedal must not be depressed.

Engine must operate.

When TCS OFF switch is not depressed within 0.5 sec-
onds after ABS and TCS warning lights turn off, the trouble
code mode comes on.
7) After completion of TCS sequence control, turn ignition
switch OFF.
11 5
4-4SERVICE PROCEDURE
20. Hydraulic Unit for ABS/TCS System

D: ABS SEQUENCE CONTROL
1) Under the ABS sequence control, after the hydraulic
unit solenoid valve is driven, the operation of the hydraulic
unit can be checked by means of the brake tester or pres-
sure gauge.
2) ABS sequence control can be started by diagnosis con-
nector or select monitor.
B4M0082D
1. OPERATIONAL GUIDELINES OF THE ABS
SEQUENCE CONTROL WITH DIAGNOSIS
CONNECTOR
1) Connect diagnosis terminals to terminals No. 3 and No.
6 of the diagnosis connector beside driver’s seat heater
unit.
2) Set the speed of all wheels at 4 km/h (2 MPH) or less.
3) Turn ignition switch OFF.
4) Within 0.5 seconds after the ABS warning light goes
out, depress the brake pedal and hold it immediately after
ignition switch is turned to ON.
CAUTION:
Do not depress the clutch pedal.
NOTE:

When the ignition switch is set to on, the brake pedal
must not be depressed.

Engine must not operate.
5) After completion of ABS sequence control, turn ignition
switch OFF.
2. OPERATIONAL GUIDELINES OF THE ABS
SEQUENCE CONTROL WITH SELECT MONITOR
NOTE:
In the event of any trouble, the sequence control may not
be operative. In such a case, activate the sequence
control, referring to“OPERATIONAL GUIDELINES OF
THE ABS SEQUENCE CONTROL WITH DIAGNOSIS
CONNECTOR”.
1) Connect select monitor to data link connector beside
driver’s seat heater unit.
2) Turn ignition switch ON.
3) Put select monitor to ABS mode.
126
4-4SERVICE PROCEDURE
22. ABS Control Module and Hydraulic Control Unit (ABSCM&H/U) (ABS 5.3i Type)

G4M0330
E: INSTALLATION
1. BRAKE AND CLUTCH PEDAL (2200 cc MODEL)
1) Installation is in the reverse order of removal proce-
dures.
CAUTION:
Be careful not to bend clutch cable too much.
Never fail to cover outer cable end with boot.
Be careful not to kink accelerator cable.
2) Adjustment after pedal installation. [W1A1].>
B4M0159A
2. ACCELERATOR PEDAL
1) Make sure that holder and casing cap are securely con-
nected.


1Casing cap


2Accelerator cable


3Toe board


4Accelerator pedal bracket


5Holder
2) Adjustment after pedal installation. [W1A1].>
3. BRAKE AND CLUTCH PEDAL (2500 cc MODEL)
1) Set pedal bracket above steering column.
2) Insert bolts of brake booster into holes on toe board,
support it from engine room, and fit holes of pedal bracket
onto the bolts.
At this time, operating rod of brake booster should be
engaged with brake pedal.
3) While pushing pedal bracket upward firmly, tighten 4
nuts and 2 bolts at its upper surface.
B4M1189A
4) Connect operating rod of brake booster to brake pedal
using clevis pin and snap pin.
5) Connect electrical connectors for stop light switch, etc.
6) Install steering column or steering assembly as before.
7) Install nut which secures clutch master cylinder.
8) Install clevis pin which secures lever to push rod.
9) Check brake pedal free play.

10) Adjust clutch pedal.

15
4-5SERVICE PROCEDURE
1. Pedal

G4M0612
4. LEAK TEST — HIGH-PRESSURE SIDE
Operate the A/C system for approx. 10 minutes, then turn
the engine off and begin the leak test.
1) Begin at the connection of the high-pressure tube to the
evaporator, and work your way along the high- pressure
side of the system to the compressor. There are three
places to check on each tube connection.
2) Check the area.
(1) Check the area where the fitting joins the tube.
G4M0613
(2) Check the area where the two parts of the fitting
join each other.
G4M0614
(3) Check the area where the nut joins the tube.
3) Check the area of the sight glass and pressure switch
(dual switch), and also check the seams of the receiver
drier.
4) Check the connections of the tubes to the condenser,
and also check any welded joints on the condenser.
CAUTION:
An oily area on the fins of the condenser may indicate
a leak.
5) Check the area where the hoses attach to the compres-
sor.
6) Check around the machined portions of the compressor
(where the compressor sections join each other).
7) If equipped, check the thermal limiter on the compres-
sor housing.
8) Check the compressor shaft seal by probing near the
center of the compressor clutch pulley.
NOTE:
Some shaft seals have a very slight amount of normal
leakage [approximately 28 g (1.0 oz) per year].
24
4-7SERVICE PROCEDURE
8. Leak Testing

3. Spark Plug
A: REMOVAL AND INSTALLATION
CAUTION:
All spark plugs installed on an engine, must be of the
same heat range.
Spark plug:
CHAMPION: RC10YC4
(Alternate)
NGK: BKR6E-11
NIPPONDENSO: K20PR-U11
1) Remove spark plug cords by pulling boot, not cord itself.
2) Remove spark plugs.
3) When installing spark plugs on cylinder head, use spark
plug wrench.
Tightening torque (Spark plug):
20.6±2.9 N⋅m (2.10±0.30 kg-m, 15.19±2.14 ft-lb)
CAUTION:
The above torque should be only applied to new spark
plugs without oil on their threads.
In case their threads are lubricated, the torque should
be reduced by approximately 1/3 of the specified
torque in order to avoid their over-stressing.
4) Connect spark plug cords.
G6M0086
B: INSPECTION
Check electrodes and inner and outer porcelain of plugs,
noting the type of deposits and the degree of electrode
erosion.
G6M0087
1) Normal
Brown to grayish-tan deposits and slight electrode wear
indicate correct spark plug heat range.
23
6-1SERVICE PROCEDURE
3. Spark Plug

2. Generator
Turn ignition switch ON
(engine OFF).
Check if charge bulb
comes on.
YES
NO
Disconnect generator
body harness
connector.
Turn ignition switch to
“START.”(engine starts.)Check if charge bulb
comes on when terminal
(L) of body harness
connector is grounded.
YES
NO
Replace charge bulb.
Check IC regulator.
Check positive terminal
of diode.
Check if charge bulb is
OFF while engine idles.
NO
YES (Remains ON or blinks.)
Check or replace fan belt.
Check generator.
Check S or BAT terminal for improper
contact.
Measure VB* of battery
while running engine at
1,500 rpm.15.5 V is less than VB.
Replace IC regulator
assembly.
VB is less
than 12.5 V.12.5 V is less than or equal to VB, and
VB is less than or equal to 15.5 V.
Check IC regulator as a
single unit.
Turn light switch ON
while engine idles.Check if charge bulb
comes on.
YES
NO
No problems
Check diode assembly.
*: Terminal voltage







39
6-1DIAGNOSTICS
2. Generator

1. Body Electrical
A: SPECIFICATIONS
BatteryReserve capacity 82 minutes (MT), 100 minutes (AT)
Cold cranking ampere 430 amperes (MT), 490 amperes (AT)
Fuse10 A, 15 A, 20 A
Combination
meterSpeedometer Electric pulse type
Tachometer Electric impulse type
Water temperature gauge Thermistor cross coil type
Fuel gauge Resistance cross coil type
Charge indicator light 12 V—1.4 W
Brake fluid level warning/parking brake indicator light 12 V—1.4 W
AT oil temperature warning light (AWD only) 12 V—1.4 W
ABS warning light 12 V—1.4 W
CHECK ENGINE warning light
(Malfunction indicator lamp)12 V—1.4 W
Oil pressure warning light 12 V—1.4 W
AIRBAG system warning light 12 V—1.4 W
Low fuel warning light 12 V—3W
FWD indicator light 12 V—1.4 W
TCS warning light 12 V—1.4 W
TCS indicator light 12 V—1.4 W
Turn signal indicator light 12 V—1.4 W (2 pieces)
Seat belt warning light 12 V—1.4 W
Door open warning light 12 V—1.4 W (5 pieces)
Headlight beam indicator light 12 V—1.4 W
Meter illumination light12 V—3 W (2 pieces)
12 V—3.4 W (4 pieces)
Headlight 12 V—60/55 W (Halogen)
Front clearance light 12 V—5W
Turn signal lightFront 12 V—21 W
Rear 12 V—21 W
Tail/Stop light 12 V—5/21 W
Back-up light 12 V—21 W
High-mount stop light12 V—18 W (SEDAN), 12 V—13 W
(WAGON)
License plate light 12 V—5W
Room light 12 V—8W
Trunk room light (SEDAN) 12 V—5W
Luggage room light (WAGON) 12 V—5W
Spot light 12 V—8 W (2 pieces)
Glove box light 12 V—3.4 W
Ash tray illumination light 12 V—1.7 W
Selector lever illumination light (AT model) 12 V—1.7 W
2
6-2SPECIFICATIONS
1. Body Electrical

B: BULB REPLACEMENT
B6M0761A
1Tachometer and temperature
gauge illumination

2Oil pressure

3CHECK ENGINE (Malfunction Indi-
cator Light)

4Tachometer illumination

5Turn signal (RH)

6Headlight beam

7Door open (Front-Right)
8Seat belt

9Door open (Front-Left)

10Door open (Rear-Right)

11Door open (Rear-Left)

12Rear gate open (Wagon)

13TCS (Operation indicator)
(TAIWAN model)

14Turn signal (LH)

15Speedometer illumination
16Speedometer and fuel gauge illumi-
nation

17Low fuel

18Charge

19Brake fluid level/parking brake

20FWD

21AT oil temperature

22ABS

23TCS (Warning) (TAIWAN model)
34
6-2SERVICE PROCEDURE
13. Combination Meter