1991 MITSUBISHI ECLIPSE check engine

BRAKES - Service Adjustment Procedures5-47
14AO399-6. Clean piston and insert into cylinder with tool.
7. Be careful that the piston boot does not become caught,
when lowering the caliper assembly and install the guide
pin.8. Check brake drag torque as follows.
(1) Start engine and hold brake pedal down for 5 seconds.
(2) Stop engine.
(3) Turn brake disc forward
10 times.
(4) Check brake drag torque with spring scale.
If the difference between brake drag torque and hub torqueexceeds the standard value, disassemble piston and clean
the piston. Check for corrosion or worn piston seal, and
check the sliding condition of the lock pin and guide pin.
Standard value: 70
N (15 Ibs.) or less
[4 Nm (3 ftlbs.)] or less
FRONT BRAKE DISC THICKNESS CHECK
NQ5FRASRemove dirt and rust from brake disc surface. Measure disc
thickness at 4 locations or more.
Limit: 22.4 mm
(.882 in.)
Replace the discs and pad assembly for both sides left and
right of the vehicle if they are worn beyond the specified limit.
FRONT BRAKE DISC RUN-OUT CHECKNOIFSAB
1.Remove the caliper support; then raise the caliper assem-
bly upward and secure by using wire.
2. Place a dial gauge approximately 5 mm
(2 in.) from the
outer circumference of the brake disc, and measure the
run-out of the disc.
Limit: 0.08 mm
(.0031 in.)
NOTETighten the nuts in order to secure the disc to the hub.

BRAKES - Service Adjustment Procedures5-494. Remove the following parts from caliper support.
14AO405
14AOs
grooves
Q
0 0
Projection
14R0037
14A0401
14AO406
MAO204Outer shim
Pad assembly
Pad clips
CPad clips
B
5.Measure hub torque with pad removed to measure brake
drag torque after pad installation.
NOTETo secure the disc to the hub, tighten the nuts.
6. Securely attach the pad clip to the caliper support.
Caution
Do not deposit grease or other dirt on pad or brake disc
friction surfaces.7. Clean the piston; then use the special tool to thread the
piston into the cylinder.
Be sure, at this time, that the stopper groove of the piston
correctly fits to the projection on the pad’s rear surface.
8. Be careful that the piston boot does not become caught,
when lowering the caliper assembly and install the lock pin.
With the engine running, forcefully depress the brake pedalfive or six times, and then check whether or not the stroke
of the parking brake lever is within the standard value.
If there is a deviation from the standard value, adjust the
stroke of the parking brake lever.
(Refer to
P.5-42.)9. Check brake drag torque as follows.
(1) Start engine and hold brake pedal down for 5 seconds.
(2) Stop engine.
(3) Turn brake disc forward 10 times.
(4) Check brake drag torque with spring scale.
If the difference between brake drag torque and hub torqueexceeds the standard value, disassemble piston and clean
piston. Check for corrosion or worn piston seal, and check
the sliding condition of the lock pin sleeve and guide pin
sleeve.Standard value: 70
N (15 Ibs.) or less
[4 Nm (3 ft.lbs)] or less
REAR BRAKE DISC THICKNESS CHECKNOSWAB
1. Remove dirt and rust from brake disc surface.
2. Measure disc thickness at 4 locations or more.
Limit: 8.4 mm
(.331 in.)
Replace the discs and pad assembly for both sides left andright of the vehicle if they are worn beyond the specified
limit.

5-52BRAKES - Service Adjustment Procedures
16LO312lOWOO
(1) Remove the ABS power relay from the ABS control unit q
bracket.-/ABS POWER RELAY CHECK
NO5FOAN(2) Connect battery to terminal 2 and check continuity
between terminals with terminal 4 grounded.
Power is supplied
Power is not
supplied
l-3 terminals
1-3 terminals
2-4 terminalsContinuity
No continuity
Continuity
A
IFLAT BATTERY REMEDYNOWOAF
When booster cables are used to start the engine when the
battery is completely flat and then the vehicle is immediately
driven without waiting for the battery to recharge itself to some
extent, the engine may misfire, and driving might not be
possible. This happens because ABS consumes a great
amount of current for its self-check function; the remedy is to
either allow the battery to recharge sufficiently, or to discon-
nect the connector for ABS circuit, thus disabling ABS.
The ABS warning light will illuminate when the connector (for
ABS) is disconnected.
After the battery has sufficiently charged, connect the connec-
tor (for
ABS) and restart the engine; then check to be sure the
ABS warning light is not illuminated.

BRAKES - Brake Booster5-61Vacuum hose
MAO394
14uoo50
14Y626Vacuum hose
mm (in.)
14A0395
SERVICE POINTS OF REMOVALNow9Al
6. REMOVAL OF VACUUM HOSE WITH CHECK VALVE
NOTE
Since the check valve is fit to the vacuum hose, replace thecheck valve as an assembly unit together with the vacuum
hose if the check valve is defective.
SERVICE POINTS OF INSTALLATIONNOWDAV
10. APPLICATION OF GREASE TO CLEVIS PIN/g. WASHERAfter applying the specified grease to the
clevis pin and
washer, insert the clevis pin and bend the cotter pin tightly.
Grease: MOPAR Multi-mileage Lubricant
Part No. 2525035 or equivalent
7. APPLICATION OF SEALANT TO
FITTINGWhen installing the vacuum hose fitting, apply semi-drying
sealant to its threaded portion.
6. INSTALLATION OF VACUUM HOSE WITH CHECK
VALVE(1) Attach the vacuum hose so that it may be inserted to a
dimension illustrated.
Caution
Prevent interference between the check valve and
brake booster.(2) The vacuum hose at the engine should be securely
connected until it contacts the hexagonal edge of the
fitting, and then should be secured by the hose clip.

5,966BRAKES - Front Disc Brake
14A04001410399
SERVICE POINTS OF INSTALLATIONNO5LDAG
2. INSTALLATION OF FRONT BRAKE ASSEMBLY(1) Measure hub torque with pad removed to measure
brake drag torque after pad installation.
NOTETighten the nuts in order to secure the disc to the hub.
(2) After installing the caliper support to the knuckle,
expand the piston, and then install the caliper body.
1. INSTALLATION OF BRAKE HOSEInstall brake hose without twisting or kinking.
Check brake drag torque as follows.
(1) Start engine and hold brake pedal down for 5 seconds.
(2) Stop engine.
(3) Turn brake disc forward 10 times.
(4) Check brake drag torque with spring scale.
If the difference between brake drag torque and hub torque
exceeds the standard value, disassemble piston and cleanthe piston. Check for corrosion or worn piston seal.
Standard value: 70
N (15 Ibs.) or less[4 Nm (3
ft.lbs.)J or less

5-76BRAKES - Rear Disc Brake
hide pin end
Caliper supportLock pin end
6. APPLICATION OF GREASE TO GUIDE PIN BOOT/
5. LOCK PIN BOOT/4. LOCK PIN SLEEVEApply the specified grease to the following points:
(1) Guide pin boot inner surface (lip)
(2) Lock pin boot inner surface (lip)
(3) Lock pin sleeve (not on threads)
Specified grease: Repair kit grease (orange)
After assembling the rear disc brake assembly, install to thebody, and then make the adjustment of the parking brake
lever as described below.
(1) Free the parking brake cable.
(2) With the engine running, firmly depress the brake pedalfive or six times.
(3) Check whether or not the stroke of the parking brake
lever is within the standard value.
Standard value: 5-7 notches
(4) If there is a deviation from the standard value, adjust
the stroke of the parking brake lever.
(Refer to
P.5-42.)

7-l
COOLING
CONTENTS
ENGINE COOLANT TEMPERATURE GAUGEUNIT,
ENGINE COOLANT TEMPERATURE
SENSOR AND ENGINE COOLANT
TEMPERATURE SWITCH................................34
RADIATOR.......................................................12
RADIATORFANMOTOR ASSEMBLY..........15
SERVICE ADJUSTMENT PROCEDURES.......8
Alternatormater Pump Drive Belt Tension
Adjustment
....................................................9Alternator/Water Pump Drive Belt Tension
Inspection..
....................................................8Cap Pressure Test
.......................................8Engine Coolant Concentration Test
.............8
EngineCoolantLeakCheck........................8Engine Coolant Replacement
.......................8
SPECIFICATIONS.............................................2
GeneralSpecifications..................................2
Lubricant.......................................................4
Sealant..........................................................4Service Specifications
...................................2Torque Specifications
...................................3THERMOSTAT
.................................................15
TROUBLESHOOTING......................................5
Noriseintemperature................................5
Overheat.......................................................5
WATER HOSE AND WATER PIPE
<1.8L Engine>................................................25
WATER HOSE AND WATER PIPE
<2.0LDOHCEngine(Non-Turbo)>.............28
WATER HOSE AND WATER PIPE
<2.0LDOHCEngine(Turbo)>....................31
WATERPUMP<1.8LEngine>.....................17
WATER PUMP <2.0L DOHC Engine>.........21

COOLING - Troubleshooting7A7
OPERATION
1. When the output of the air conditioner*--control unit is “LO” (OV)(when the
compressor magnet clutch isdeenergized)
l When the ignition switch is at “ON” , and if
engine coolant temperature rises to
85°C
(185”F), the thermosensor contacts close,
causing current to flow through the radiator
fan motor relay (coil), thermosensor and
ground, causing the radiator fan motor relay
contacts to close.
l Current flows through the radiator fan motor
relay contacts, radiator fan motor and ground,causing the radiator fan motor to rotate.
2. When the output of the air conditioner
control unit is “HI” (approx. 12V)(when the
compressor magnet clutch is
energized)l If the therm0 sensor is “ON” when the
engine coolant temperature exceeds
85°C
(185°F). the condenser fan motor control relay
is also “ON”, thus the condenser fan as well
as the radiator fan start rotating at a high
speed.
TROUBLESHOOTING HINTS
1. Neither the radiator fan nor condenser fanrotate at
all.l Check sub fusible link
No.3.
2. Only the condenser fan does not operate.l Check dedicated fuse
No.5.
3. The radiator fan and condenser fan do notoperate
in the low speed mode, but operateotherwise.
(1)The A/C compressor magnet clutch does not
enter the “ON” state.
l Check whether the output of the air con-
ditioner control unit is available.
NOTEFor troubleshooting of the air conditioner
control unit, refer to GROUP 24.
(2)The A/C compressor magnet clutch enters
the “ON” state.
l Check the resistor.Conditions
under which the Air Conditioner Control Unit Outputs a “HI” Signal
Ignition switch (IG2)
Blower switchAir conditioner switch
Compressor magnet clutch
ON
ON
ON
ON
Remarksl If any of the switches and sensors is OFF,
the air conditioner control unit will
output a “LO” signal (OV).
Fan Operating Mode
Switch conditions
Air conditioner switch
Therm0 sensor
LO
(OV)OFFLO
(OV)ONHI
(12V)OFFHI
(12V)ONFan rotating condition
Cooling (radiator) fanCondenser fan
OFFOFF
HIGHOFF
LOWLOW
HIGHHIGH
NOTE
_-The therm0 sensor is ON when the temperature reaches 85°C (185°F) or more.