1991 MITSUBISHI ECLIPSE battery

BRAKES - Anti-lock Braking System Troubleshooting5-39
E-6Abnormality of valve relay drive circuitI
j-a [Explanation]When the ignition switch is turned ON, the ABSnormal. In addition, normally it monitors whether or
ECU switches the valve relay OFF and ON for annot there is power in the valve power monitor line
initial check, compares the voltage of the signal tosince the valve relay is normally ON. Then, if the
the valve relay and valve power monitor line voltagesupply of power to the valve power monitor line is
to check whether the valve relay operation is
interrupted, the warning light illuminates.
IGNITIONMAIN FUSIBLESWITCHLINK @W-31)When the valve relay is
checked, are the followingconditions found?No.85-No.86:resistancevalue 60-120 Q
No.30-No.87a: continuityNo.30-No.87: No continui-
When battery voltage is ap-plied between terminals
No.86 and No. 85 grounded.
No. 30-No. 87: continuity
No.
30-No. 87a: no continui-
tyremove the HU connec-
NoValve relay malfunction
Replace valve relay.
IConnect the HU
remove the ECU con-
I Yes
IValve relay drive circuit isnormal.I

5-40BRAKES - Anti-lock Braking System Troubleshooting
E-7Abnormality of motor drive circuit
[Explanation]The ABS ECU illuminates the warning light for the
motor relay and motor in the following cases.
l When the motor relay does not function
lWhen there is trouble with the motor itself and it
does not revolve
[Hint]If there is motor operation noise when wheel speed
exceeds
Gkm/h (4mph) when starting up after the
engine is started, there is a broken or short circuitedmotor monitor wire.
lWhen the motor ground line is disconnected andthe motor does not revolve
l When the motor continues to revolve
Does the motor make a
YesBroken wire or short cir-noise when wheel speed
-cuit in motor monitor line
exceeds 6 km/h (4 mph)?
b
NoRepair the harness between HU and ECU.
emove the motor rela
ABS ECU
14A0105
Remove the motor relav and
check resistance values.
No.
85-No. 86:resistancevalue 30-60 QNo.30-No.87: no continui-
ty
Battery voltage is applied on
terminals No. 86 and No. 85
grounded
No. 30-No. 87: continuity
Yes
q Motor relay malfunction 1
Replace motor relay.I
Is pump motor ground con-netted normally?Connect ground wire.I
b
Does voltage between bodyNo
connector terminal 51 andIBroken wire in pumpmotor power circuit
ground indicate battery vol-
tage?1Repair the harness.
YesIs resistance between body
- No L Malfunction of harness
connector terminal No. 2 andbetween HU and ECU
No.26 30-60 ohms?b
YesRepair harness.
Motor drive circuit is normal.

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.

7-14COOLING - Radiator
A
OFF
ON
h
--- ,
BWatertemperature
16v1100
Standard value:Continuity
at 82-88X (180-190°F). . . . . . . . . . .at A pointNo continuity at
78°C (172°F) or less . . . . . . . . at 6 point.r;;;
RADIATOR FAN MOTOR RELAY INSPECTION
(1) Remove radiator fan motor relay from the relay box locatedat the right side in the engine compartment.
16LO312
1Mating marks(2) Check for continuity between the terminals when the
battery power-supply is applied to terminal 0, and terminal
@ is grounded.
When currentBetween
flowsterminals l-3Continuity
When no
current flowsSERVICE POINTS OF
JNSTALLATIONNOMDAF
7. INSTALLATION OF RADIATOR LOWER HOSE/
6. RADIATOR UPPER HOSEAlign the mating marks on the radiator hose and hose
clamp and then connect them; then, applying force in the
direction indicated by the arrow in the illustration, seat the
~
1clamp to the trace marks of the previous connection.Caution
Be sure to install the hose clamps at the trace marks ofthe
previous connection.

9-24ENGINE - Service Adjustment Procedures
ENGINE 4.8L Engine>
SERVICE ADJUSTMENT PROCEDURES -
CHECKING COMPRESSION PRESSURENOSFFAI
(1) Before checking compression, ensure that engine oil, the
starter motor, and battery are all in good condition.
(2) Start the engine and wait until engine coolant temperature
has risen to
85-95°C (185-205°F).
(3) Stop the engine and pull the spark plug cables.
(4) Remove the spark plugs.
(5) Crank the engine to remove any foreign objects in the
cylinders.Caution
Cover the spark plug holes with shop towel, etc., in
order to keep expelled foreign objects from flying out,
and keep away from the holes. When measuring
compression with water, oil, or fuel having entered the
cylinder through a crack, etc., these will come flying
out of the spark plug hole hot and fast, so be sure to
take the proper precautions.
(6) Set the compression gauge to the spark plug hole.
(7) Holding the throttle valve full open, crank the engine and
measure compression.
Limit: Min. 920
kPa (130 psi) [250-400 rpm]
(8) Perform 6 and 7 above for all the cylinders, ensuring that
compression pressure differential for each of the cylinders
/Iis within the specified limit.
__Differential limit: Max. 100
kPa (14 psi)
(9) If a cylinder’s compression or pressure differential exceeds
the limit, add a small amount of oil through the spark plug
hole and repeat steps (6)-(8).
0If the addition of oil brings compression up, it is possiblethat there is poor contact between the piston ring and
cylinder wall.
@ If not compression does not come up, valve seizure,
poor valve seating, or a compression leak from the
gasket are all possible.
/y
-