oil pressure MITSUBISHI LANCER EVOLUTION IV 1998 Owner's Manual

INTAKE AND EXHAUST –
Service Specifications /
Special Tool / On-vehicle Service15-2
SERVICE SPECIFICATIONS
ItemsStandard valueLimit
Turbocharger boost pressure kPa {kg/cm2}53 – 87 {0.54 – 0.89}–
Wastegate actuator activation pressure kPa {kg/cm2}Approx. 100 {1.02}–
Wastegate solenoid valve coil resistance (at 20
C) Ω62 – 74–
Air bypass valve activation pressure kPa {mmHg}Approx. 53 {400}–
Secondary air control solenoid valve coil resistance (at 20
C) Ω28 – 36–
Intake manifold and exhaust manifold mounting surface distortion
mmWithin 0.150.20
SPECIAL TOOL
ToolNumberNameApplication
MB998770Oxygen sensor
wrenchRemoval and installation of oxygen sensor
ON-VEHICLE SERVICE
1. TURBOCHARGER BOOST PRESSURE
CHECK
Caution
Carry out driving tests in a location where full-throttle
acceleration is possible with utmost safety. Two persons
should be in the vehicle during the test, the assistant
in the front passenger seat reading the pressure gauge.
(1) Disconnect the hose (black) from the boost pressure
control solenoid valve and fit the pressure gauge to this
hose.
After the hose (black) has been disconnected, fit a blank
plug to the solenoid valve nipple.
(2) Drive at full-throttle acceleration in second gear and
measure the boost pressure when the engine speed
exceeds about 3,000 r/min.
Standard value:
53 – 87 kPa {0.54 – 0.89 kg/cm
2} <EVOLUTION-IV>
59 – 84 kPa {0.61 – 0.86 kg/cm2} <EVOLUTION-V>
Wastegate
solenoid valve
Blank plug

INTAKE AND EXHAUST – On-vehicle Service15-4
3. WASTEGATE ACTUATOR CHECK
(1) Connect a hand pump (pressure type) to the nipple.
(2) Gradually increase the pressure being applied to check
for the pressure at which the wastegate actuator rod starts
moving (approx. 1 mm stroke).
Standard value: Approx. 100 kPa {1.02 kg/cm
2}
Caution
Do not apply a pressure more than 120 kPa {1.23
kg/cm
2} to prevent the diaphragm from being
damaged.
(3) If the pressure drastically deviates from the standard
value, check the actuator or wastegate valve and, if
necessary, replace the actuator or turbocharger assembly.
4. WASTEGATE SOLENOID VALVE CHECK
4-1 OPERATION CHECK
(1) Connect a hand vacuum pump to nipple A of the solenoid
valve.
(2) Using jumper wires, connect the solenoid valve terminal
to battery terminals.
(3) Disconnecting and reconnecting the jumper wire on the
(–) terminal side, apply vacuum to check for airtightness.
Jumper wireNipple B conditionNormally
ConnectedOpenVacuum leaks.
PluggedVacuum retained.
DisconnectedOpenVacuum retained.
4-2 COIL RESISTANCE CHECK
Measure the resistance across solenoid valve terminals.
Standard value: 62 – 74 Ω (at 20
C)
5. AIR BYPASS VALVE CHECK
(1) Remove the air bypass valve.
(2) Connect a hand vacuum pump to the air bypass valve
nipple.
(3) Apply a vacuum of approx. 45 kPa {340 mmHg} and
check that the valve is airtight.
(4) Increase the vacuum and check for valve operation.
VacuumValve operation
Approx. 53 kPa {400 mmHg}Starts moving

INTAKE AND EXHAUST – Intake Manifold15-9
INTAKE MANIFOLD
REMOVAL AND INSTALLATION
Pre-removal Operation
(1) Fuel Discharge Prevention
(2) Throttle Body Removal (Refer to GROUP 13.)
(3) Front Exhaust Pipe Removal (Refer to P.15-14.)
(4) Air Control Valve Bracket Removal (Refer to P.15-8.)
(5) Strut Tower Bar RemovalPost-installation Operation
(1) Strut Tower Bar Installation
(2) Air Control Valve Bracket Installation
(Refer to P.15-8.)
(3) Front Exhaust Pipe Installation (Refer to P.15-14.)
(4) Throttle Body Installation (Refer to GROUP 13.)
O-ring
Unit: Nm {kgf
m}
15
Engine oil
3 {0.3} 10 – 13 {1.0 – 1.3}
10 – 12
{1.0 – 1.2}
12 – 15 {1.2 – 1.5}
35 {3.6}
9 {0.9}30 {3.1}35 {3.6}20 {2.0}22 {2.2}20 {2.0}
14 14
167
5
17
1521
3
4 6
7 7
19
20
18 8
9 12
1011
13
Removal steps
1. Center cover
2. Ignition coil connector connection
3. Oxygen sensor connector connec-
tion
4. Crank angle sensor connector con-
nection
5. Injector connector connection
6. PCV hose
7. Vacuum hose connection
8. Brake booster vacuum hose con-
nection
9. Vacuum tank, solenoid valve, and
vacuum hose assembly10. Intake manifold stay
11. Oil level gauge guide assembly
12. Vacuum hose and pipe mounting
bolt
13. Fuel return hose connection
A14. Fuel high pressure hose connection
A15. Delivery pipe, injector, and pres-
sure regulator assembly
16. Insulator
17. Insulator
18. Alternator brace stay
19. Intake manifold
20. Intake manifold gasket

INTAKE AND EXHAUST – Intake Manifold15-10
REMOVAL SERVICE POINT
ADELIVERY PIPE, INJECTOR AND PRESSURE
REGULATOR REMOVAL
Remove the delivery pipe with the injectors and pressure
regulator attached to it.
Caution
Care must be taken, when removing the delivery pipe,
not to drop the injector.
INSTALLATION SERVICE POINT
AHIGH-PRESSURE FUEL HOSE INSTALLATION
(1) When connecting the high-pressure fuel hose to the
delivery pipe, apply a small amount of new engine oil
to the O-ring and then insert the high-pressure fuel hose,
being careful not to damage the O-ring.
Caution
Be careful not to let any engine oil get into the delivery
pipe.
(2) Check to be sure that the high pressure hose turns
smoothly.
If it does not turn smoothly, the O-ring may be trapped.
Remove the high-pressure fuel hose to check for damaged
O-ring and then re-insert it into the delivery pipe and
check once again.
(3) Tighten the mounting bolts to the specification.
INSPECTION
INTAKE MANIFOLD CHECK
(1) Check the intake manifold for damage or cracking and
replace it if defective.
(2) Using a straight edge and feeler gauge, check for distortion
of the cylinder head installation surface.
Standard value: 0.15 mm or less
Limit: 0.2 mm
High-pressure
fuel hoseDelivery pipe
O-ring

ENGINE ELECTRICAL – Charging System16-2
CHARGING SYSTEM
ALTERNATOR
REMOVAL AND INSTALLATION
Pre-removal Operation
(1) Under Cover Removal
(2) Engine Mount Removal
(3) Strut Tower Bar RemovalPost-installation Operation
(1) Strut Tower Bar Installation
(2) Engine Mount Installation
(3) Under Cover Installation
(4) Drive Belt Tension Adjustment
(Refer to GROUP 11 – On-vehicle Service.)
Unit: Nm {kgf
m}
44 {4.5}
7 3
2
6
15 4
24 {2.4} 22 {2.2} 9 {0.9}12 – 15
{1.2 – 1.5}10 – 13
{1.0 – 1.3}
12 {1.2}
Removal steps

A1. Drive belt (Power steering, A/C)

B2. Delivery pipe, injector and pressure
regulator assembly
3. Oil level gauge guide4. Pressure hose connection

C5. Alternator
6. Water pump pulley
7. Alternator brace

REAR AXLE – Service Specifications / Lubricant / Sealant27-2
SERVICE SPECIFICATIONS
<Vehicles with AYC>
ItemsStandard valueLimit
Rear axle total backlash mm–5
Pressure generated by hydraulic unit MPa {kgf/cm2}0 – 1.6 {10.0 – 16.0}–
Wheel bearing axial play mm–0.05
Wheel bearing rotation starting torque Nm {kgf
cm}–1.0 {10.5} or less
<Vehicles without AYC>
ItemsStandard valueLimit
Right-to-left difference in combined thickness of friction plate and fric-
tion disc mm0 – 0.05–
Clearance between spring plate and differential case mm0.06 – 0.25–
LSD differential torque
Nm {kgf
m}
When new clutch plate is installed5 – 19 {0.5 – 1.9}–
Nm {kgf
m}
When existing clutch plate is installed2 – 19 {0.2 – 1.9}–
Distortion of friction plate and friction disc mm–0.08
Difference in thickness between friction plate, friction disc, and spring
plate mm–0.1
LUBRICANT
<Vehicles with AYC>
ItemsSpecified lubricantCapacity
Gear oilTorque
transfer
differential
DifferentialMITSUBISHI GENUINE DIA QUEEN SUPER
HYPOID GEAR OIL (GL-5)0.41 ± 0.02 dm3
{0.41 ± 0.02 }
differentialTorque transfer
mechanismMITSUBISHI GENUINE DIA QUEEN AYC FLUID0.700
0.05dm3
{0.700
0.05}
Hydraulic piping fluidMITSUBISHI GENUINE DIA QUEEN ATF-SPII1 dm3 {1 }
Torque transfer mechanism oil seal lipsVaselineAs required
SEALANT
<Vehicles with AYC>
ItemsSpecified sealant
Torque transfer differential vent plugSemi-drying sealant: THREEBOND 1281B (460 g)
Torque transfer mechanism cover

REAR AXLE – Special Tools27-3
SPECIAL TOOLS
ToolNumberNameUse
MB991529Diagnosis code
check harnessInspection of AYC (diagnosis display by AYC
warning lamp)
MD998330
(MD998331)Oil pressure
gauge
(2,942 kPa
{30 kgf/cm
2})
Hydraulic pressure measurement <vehicles
with AYC>
MB991705Hose adapter
MB990925Bearing & oil seal
installer setPressfitting of oil seal <differential>
MB991115Oil seal installerPressfitting of oil seal <differential> (used in
combination with MB990938)
MD998812Installer capPressfitting of oil seal <torque transfer mecha-
nism of vehicles with AYC>
MD998813Installer 100
MD998829Installer adapter
(60)
MB990767End yoke holderFixing of hub

REAR AXLE – Troubleshooting <AYC>27-19
Code No. 82: Electric pump systemProbable cause
This code is output if the pressure switch is not set to high-pressure position despite
the AYC-ECU’s command to drive the AYC relay for a given period of time.
Low hydraulic oil level

Oil leak

Defective fusible link

Defective AYC relay

Defective harness or connector

Defective AYC motor

Defective accumulator pressure switch

Defective AYC-ECU
OK
Replace AYC-ECU.
Check the harness
between AYC relay and
AYC motor, and between
AYC motor and body
ground.NG
Replace
NG
OK
Check the trouble symptom.
OK
Check the following
connectors:
A-126, B-94, B-27, F-32NG
Repair
OK
Replace AYC-ECU.
NG
Check the harness
between AYC-ECU and
accumulator pressure
switch.NG
Repair
NG
Check and repair the har-
ness between fusible link
no. 10 and AYC relay.
OK
Check the trouble symp-
tom.
OK
Replace the hydraulic unit
for a defective accumula-
tor pressure switch.
NO
Repair the leak.
OK
Check the trouble symptom.
NG
Check the following
connector: A-126NG
Repair
YES
Add hydraulic oil.
Is the hydraulic oil level correct in the reservoir tank?
(Refer to P.27-29.)NOIs there a hydraulic oil leak?
Measure at A-126 AYC relay connector.

Disconnect the connector and measure at the harness side.

Voltage across 5 and body ground
OK: Battery voltage
NG
NO
Can pump be operated?YESMeasure at F-31 accumulator pressure switch connector.

Disconnect the connector and measure at the harness side.

Ignition switch: ON

Voltage across 2 and body ground
OK:Battery voltage
YES
Is diagnosis code no. 81 output?YESCheck the AYC relay system. (Refer to P.27-18.)
NG
Check the following
connectors: B-95, B-94,
D-06, F-30, F-31NG
Repair
OK

Check AYC relay for
continuity.
(Refer to P.27-52.)

Check AYC motor for
operation.NG
Repair

REAR AXLE – Troubleshooting <AYC>27-22
INSPECTION PROCEDURE 2
AYC warning lamp remains lit up after the engine has
started.
Probable cause
The AYC warning lamp ON circuit is probably short-circuited.
Defective combination meter

Defective harness (short-circuit)

Defective AYC-ECU
NOTE
This symptom is limited only when AYC-ECU power supply is in normal condition and the diagnosis
code is correct.
OK
Replace combination meter.
NO
Check the harness between AYC
warning lamp and AYC-ECU.NG
Repair
Does the AYC warning lamp goes out
when the B-96 AYC-ECU connector
is disconnected?YESReplace AYC-ECU.
INSPECTION PROCEDURE 3
AYC is inoperative.
Unable to start or accelerate on slippery road surfaces.
Probable cause
The hydraulic oil level is probably low, there is an oil leak, the hydraulic unit is defective,
or the torque transfer differential is defective.
Low hydraulic oil level

Oil leak

Defective hydraulic unit

Defective torque transfer differential
NOTE
This symptom is limited only when the diagnosis code is correct.
NG
Replace the hydraulic unit.
NG
Replace the torque transfer differential.
Check the trouble symptom.
NG
Replace AYC fluid.
OK
Correct
Check the trouble symptom.NO
Replace the torque transfer differential.
OK
Is foreign matter trapped in the hydrau-
lic line?YES
Repair
OK
Check the AYC for operation.OKCheck the AYC fluid.
NG
Add hydraulic oil.
NG
Check hydraulic pressure.NGBleed the system of air.
Check the hydraulic oil level.NGCheck for oil leak.OK
Repair

REAR AXLE – On-vehicle Service <Vehicles with AYC>27-29
3-2 TORQUE TRANSFER MECHANISM
(1) Remove the drain plug to discharge the gear oil.
(2) Fit the drain plug and tighten it to the specified torque.
(3) Remove the filler plug and add the specified gear oil
up to the bottom end of the filler plug hole.
Specified gear oil:
MITSUBISHI GENUINE DIA QUEEN SUPER AYC
FLUID
Quantity used: 0.70
0
0.05dm3{0.700
0.05}
(4) Fit the filler plug and tighten it to the specified torque.
4. FLUID LEVEL CHECK
(1) Remove the maintenance lid located in the luggage
compartment.
(2) If the vehicle has been run, leave it for 5 min. or more
in an ordinary temperature (10
C to 30
C) to allow the
accumulator internal pressure to drop.
NOTE
If the ambient temperature is less than 10
C or less,
allow more time to leave the vehicle to stand idle.
(3) Check that the fluid level in the oil reservoir is in the
range between MAX and MIN.
(4) If the fluid level is lower than MIN, add the specified
fluid.
Specified fluid: MITSUBISHI DIA QUEEN ATF-SPII
(5) Reinstall the maintenance lid.
5. BLEEDING
(1) Lift up the vehicle.
(2) Remove the cap of the left bleeder screw on the torque
transfer differential and connect a vinyl hose.
(3) Gradually turn the steering wheel clockwise from the
straight-ahead position. At this time, loosen the left bleeder
screw and check that fluid is discharged with air.
(4) After air has been completely discharged, tighten the
bleeder screw.
Caution
While the system is being bled of air, add fluid as
necessary to ensure that it is left in the oil reservoir
during the entire procedure.
(5) Repeat steps (3) and (4) two to three times until no air
bubbles are recognized in the fluid that comes out. Then,
tighten the bleeder screw to the specified torque.
Tightening torque: 9 Nm {0.9 kgf
m}
(6) Perform steps (2) through (5) for the right bleeder screw.
Note, however, that the steering wheel should be turned
counterclockwise.
Filler plug
49 Nm {5.0 kgf
m}
Gear oil
Drain plug
49 Nm
{5.0 kgf
m}
Bleeder
screws Vinyl hose