ECU MITSUBISHI LANCER EVOLUTION VIII 2004 Workshop Manual

ENGINE (4G6) – GENERAL, BASE ENGINE (6 M/T)18
Control system (6M/T)
The following changes have been made, based on the control system in the 4G63DOHCT/C engine fitted in the current
Lancer Evolution VIII.
* Addition of wastegate solenoid valve (1 valve –> 2 valves)
System Block Diagram
Air flow sensor (AFS)
Air temperature sensor
Atmospheric pressure sensor
Water temperature sensor
Throttle position sensor (TPS)
A/C switch
A/C load signal
Cam position sensor
Crank angle sensor
Alternator FR terminal
Vehicle speed sensor
Power steering fluid pressure
switch
Knock sensor
Intercooler water spray (auto)
Intercooler water spray (manual)
O
2sensor
Ignition switch –IG
Ignition switch –STPower supplyEngine ECU
Fuel injection control
Idle speed control (ISC)
Ignition timing control
Engine control relay control
Fuel pump relay control
A/C relay control
Fan motor control (radiator)
Fan relay control (A/C
condenser)
Alternator control
Air flow sensor filter reset
control
Fuel pressure control
Supercharging pressure
control
Secondary air controlIntercooler water spay control
Engine warning light control
O
2sensor heater control
Purge control
Diagnosis output
RAM data transmissionNo. 1 indicator
No. 2 indicator
No. 3 indicatorNo. 4 indicator
ISC servo (stepper motor)
Ignition coil A (No.1 – No.4)
Ignition coil B (No.2 – No.3)
Engine control relay
Fuel pump relay 2
Fuel pump relay 3
A/C relay
Fan controller (radiator fan)
Fan motor relay (HI, LOW)
(A/C condenser)
Alternator G terminal
Air flow sensor
Fuel pressure control valve
No. 1 wastegate solenoid valve
No. 2 wastegate solenoid valve
Secondary air control solenoid
valve
Intercooler water spray relay
Intercooler water spray lamp
Tachometer
Engine warning lights O
2sensor heater
Purge control solenoid valve
Diagnosis output terminal
Diagnosis output terminal (for
MUTII)

ENGINE (4G6) – GENERAL, BASE ENGINE (6 M/T)19
1. O2 sensor2. Air flow sensor3. Air intake sensor4. Throttle position
sensor
5. Cam position sensor6. Crack angle sensor7. Atmospheric pressure
sensor
8. Water temperature
sensor
9. Knock sensor•Power supply
• Ignition switch IG
•Ignition switch ST
•Vehicle speed sensor
• A/C switch
1. Injector2. ISC servo (stepper
motor)
3. Fuel pressure control
solenoid valve
4. No.1 wastegate solenoid
valve
5. No.2 wastegate solenoid
valve
6. Purge control solenoid
valve
7. Secondary air control
solenoid valve•Engine control relay
•Fuel pump relay 2, 3
•A/C relay
•Ignition coil
• Fan controller
Engine ECU
6. Purge control
solenoid valveCanister
7. Secondary air
control solenoid valveFrom fuel tank
Secondary
air valveBypass
valve
1. O2sensor
3. Fuel pressure
control solenoid valve
4. Throttle
position
sensor
7. Atmospheric pressure
sensor
3. Air intake
sensor2. Air flow sensor
4. No.1
wastegate
solenoid valve
5. No.2 wastegate
solenoid valve
Only operates on 6M/TWastegate actuatorFuel pressure
regulator
1. Injector5.Cam position sensor8.Water temperature sensor
9.Knock sensor
Crack angle sensor
Catalytic converter Air
intakeCheck
valve
2. ISC servo
Vacuum
tank
From fuel
pump To fuel
tank
Control system diagram

ENGINE (4G6) – CONTROL SYSTEM (6 M/T)110
1. Supercharging pressure control
The maximum torque has been increased, compared to the 4G63DOHCT/C engine in the current Lancer Evolution VIII, by
installing an additional wastegate solenoid valve (increased from 1 to 2 valves).
By adding a parallel No.2 wastegate solenoid valve to the previous system, provides extra relief capacity for the pressure
applied to the wastegate actuator thus increasing the range of supercharging pressure..
The engine ECU raises the supercharging pressure even further, thus raising the maximum torque, by driving the No.2
wastegate solenoid valve when the engine approaches maximum torque.
The No.1 wastegate solenoid valve is essentially controlled in the same way as previously.
Air flow
sensor
Knock
sensor
Engine
ECUBatterySecondary air
control solenoidvalve
Secondary
air valve
Ignition
switch
Air
intakeBypass valveVacuum tank
Intercooler
Turbocharger
Wastegate
actu
ator No. 1
wastegate
solenoid
valve
No. 2 wastegate
solenoid valve Crank angle
sensor

21Power Train – Differential
SECTION 2
POWER TRAIN
CONTENTS
Differential ..............................................21
Differential
The following changes have been made to the Super AYC differential.
• Reduced weight: The weight of the differential has been reduced by building the clutch case from aluminium, rather than
steel, and partially revising the thickness of the clutch discs.
• Improved strength and durability: Strength and durability have been raised by adopting special highstrength steel for the
hypoid gears (pinion gear and drive gear), instead of the cast steel used previously.
• Improved control when ABS is operating: Revisions to the communications with the ABSECU and the control procedure
during ABS operation, as well as active ACD/AYC control in high friction road surfaces, such as circuits, have led to
increased steerability and stability.
Structural Diagram
Hypoid gears
Clutch case
Clutch discs

TitleNo.Issue dateTitleNo.Issue date
New model manualsBody Service Manuals
•Mirage, Lancer1036F3010/1995•Mirage, Lancer
(supplement)1036F528/1996
•Mirage, Lancer1036F311/1996•Lancer Sedia1036K505/2000
•Mirage, Lancer1036F328/1996•Lancer Sedia
(supplement)1036K517/2000
•Mirage, Lancer1036F337/1997•Lancer Evolution VII
(supplement)1036K525/2001
•Lancer1036F341/1998•Lancer Sedia
(supplement)1036K5310/2001
•Mirage, Lancer1036F3510/1998
•Lancer1036F361/1999
•Lancer1036F3712/1999
•Lancer Sedia1036K305/2000
•Lancer Sedia1036K317/2000
•Lancer Evolution VII1036K321/2001Wiring layout diagram
Service Manuals
•Lancer Sedia1036K335/2001•Lancer Evolution VIII1036K771/2003
•Lancer Sedia1036K345/2001•Lancer Evolution VII
MR (Supplement)1036K802/2004
•Lancer Evolution VII1036K351/2001
•Lancer Sedia1036K365/2002
•Lancer Evolution VIII1036K371/2003
•Lancer1036K382/2003
•Lancer1036K3912/2003
•Lancer Evolution VIII MR1036K402/2004
Service ManualsEngine Service Manuals
•Lancer Sedia1036K005/2000•4G6 Engine1039G461/2001
•Lancer Sedia1036K017/2000•4G6 Engine1039G631/2003
•Lancer Evolution VII
(supplement)1036K021/2001
•Lancer Sedia (supplement)1036K035/2001
•Lancer Sedia (supplement)1036K0410/2001Transmission Service
Manuals
•Lancer Evolution VII
(supplement)1036K051/2002•W5M51 Manual
Transmission1039M171/2001
•Lancer Sedia (supplement)1036K065/2002•W5M51Manual
transmission(Supplement)1039M221/2003
•Lancer Evolution VII
(supplement)1036K071/2003•W6MAA Manual
transmission1039M231/2003
•Lancer (supplement)1036K082/2003
•Lancer (supplement)1036K0912/2003
•Lancer Evolution VIII MR1036K102/2004
Related information
Precautions to be taken when servicing vehicles with seatbelts fitted with SRS Airbag and Pretensioners
Precautions
1. Incorrect inspection or servicing of SRS airbag and pretensioner fitted seatbelt parts, as well as any related
components, could lead to major damage or nonoperation as a result of sudden, unintentional operation of SRS
airbag and pretensioner fitted seatbelts (incorrect deployment).
2.In cases where heating from painting processes occurs, the SRSECU, driver side airbag module, passenger side
airbag module, pretensioner fitted seatbelts, and cross springs, should be removed.
• 93°C and above: SRSECU, driver side airbag module, passenger side airbag module, cross springs
• 90°C and above: pretensioner fitted seatbelts3.Inspections and servicing of SRS airbag and pretensioner fitted seatbelt parts and any related components must,
without fail, be done by a Mitsubishi Motors authorized dealer.
4. Inspections and servicing of SRS airbag and pretensioner fitted seatbelt parts and any related components must be
done paying scrupulous attention to the relevant service manual (particularly in the case of Group 52B – SRS
airbags).

34CHANGING WELDED PANELS – ROOF
Fitting
1.Temporarily set the new roof to the body, and drill holes for
rivets with drill (
5mm).
2. Remove the roof, smooth off any burring around the holes,
then clean the body.
3. Apply structural adhesive to the body side, then fit the roof.
4. Using the appropriate tool, set the rivets as follows:
Rivets: POP rivet SD62HR
(1) Insert the rivet into the hole in the base material (roof).
(2) Insert the appropriate tool into Part A of the rivet.
(3) Using the appropriate tool, use the tool handle to press therivet flange surface down.
(4) Secure the rivet, snapping at the thin part of A.
Note
In places where setting rivets so that flange makes good
contact is difficult, it is OK to set from inside the vehicle.
Reference:
Appropriate tool (use rivet
4.8mm)
Lobster Tools Ltd
Hand riveter: HR003B
5.When adhesive is dry, remove any excess adhesive then, to
prevent water ingress, apply body sealant to cover entire rivet
area and roof edge.
:black shading indicates body sealant
Product name:Sun Star Penguin Seal 353 (white)
Adhesive TypeProduct name
Epoxy structural
adhesiveSumitomo 3M Auto Mix
Panel Bond 8115
appropriate tool
part A appropriate
tool
flange
rivet
Roof panel
Body sealant
Rivet

TitleNo.Issue dateTitleNo.Issue date
New model manualsBody Service Manuals
•Mirage, Lancer1036F3010/1995•Mirage, Lancer
(supplement)1036F528/1996
•Mirage, Lancer1036F311/1996•Lancer Sedia1036K505/2000
•Mirage, Lancer1036F328/1996•Lancer Sedia
(supplement)1036K517/2000
•Mirage, Lancer1036F337/1997•Lancer Evolution VII
(supplement)1036K525/2001
•Lancer1036F341/1998•Lancer Sedia
(supplement)
•Lancer Evolution VIIIMR (supplement)1036K53
1036K5410/2001
2/2004
•Mirage, Lancer1036F3510/1998
•Lancer1036F361/1999
•Lancer1036F3712/1999
•Lancer Sedia1036K305/2000
•Lancer Sedia1036K317/2000
•Lancer Evolution VII1036K321/2001Wiring layout diagram
Service Manuals
•Lancer Sedia1036K335/2001•Lancer Evolution VIII1036K771/2003
•Lancer Sedia1036K345/2001•Lancer Evolution VIII
MR (supplement)1036K802/2004
•Lancer Evolution VII1036K351/2001
•Lancer Sedia1036K365/2002
•Lancer Evolution VIII1036K371/2003
•Lancer1036K382/2003
•Lancer1036K3912/2003
•Lancer Evolution VIII MR1036K402/2004
Service ManualsEngine Service Manuals
•Lancer Sedia1036K005/2002•4G6 Engine1039G461/2001
•Lancer Sedia1036K017/2000•4G6 Engine1039G631/2003
•Lancer Evolution VII
(supplement)1036K021/2001
•Lancer Sedia (supplement)1036K035/2001
•Lancer Sedia (supplement)1036K0410/2001Transmission Service
Manuals
•Lancer Evolution VII
(supplement)1036K051/2002•W5M51 Manual
Transmission1039M171/2001
•Lancer Sedia (supplement)1036K065/2002•W5M51Manual
transmission
(Supplement)1039M221/2003
•Lancer Evolution VIII
(supplement)1036K071/2003•W6MAA Manual
transmission1039M231/2003
•Lancer (supplement)1036K082/2003
•Lancer (supplement)1036K0912/2003
Related information
Precautions to be taken when servicing vehicles with seatbelts fitted with SRS Airbag and Pretensioners:
1. Incorrect inspection or servicing of SRS airbag and pretensioner fitted seatbelt parts, as well as any related
components, could lead to major damage or nonoperation as a result of sudden, unintentional operation of SRS
airbag and pretensioner fitted seatbelts (incorrect deployment).
2.In cases where heating from painting processes occurs, the SRSECU, driver side airbag module, passenger side
airbag module, pretensioner fitted seatbelts, and cross springs, should be removed.
• 93°C and above: SRSECU, driver side airbag module, passenger side airbag module, cross springs• 90°C and above:pretensioner fitted seatbelts
3.Inspections and servicing of SRS airbag and pretensioner fitted seatbelt parts and any related components must,
without fail, be done by a Mitsubishi Motors authorized dealer.
4. Inspections and servicing of SRS airbag and pretensioner fitted seatbelt parts and any related components must be
done paying scrupulous attention to the relevant service manual (particularly in the case of Group 52B – SRS
airbags).

MPI General13A2
General
Service information issued contains the changes noted below. Other service details remain unchanged.
• Change from one to two wastegate solenoid valves. However, the No.2 wastegate solenoid valve on the 5 M/T is not
functional.
• Diagnosis code No. P1500 changed to P0622. <6M/T>
MPI system diagram
1.O2 sensor2. Air flow sensor3. Air intake sensor4. Throttle position
sensor
5. Cam position sensor6. Crack angle sensor7.Barometric pressure
sensor
8. Water temperature
sensor
9. Knock sensor•Power supply
• Ignition switch IG
• Ignition switch ST
•Vehicle speed sensor
• A/C switch
• A/C load signal
•Power steering fluid
pressure switch
•Alternator FR signal
•Intercooler water spray
switch (auto)
•Intercooler water spray
switch (manual)
1.Injector2. ISC servo (stepper
motor)
3.Fuel pressure control
solenoid valve
4.No.1 wastegate solenoid
valve
5. No.2 wastegate solenoid
valve
6. Purge control solenoid
valve
7. Secondary air control
solenoid valve•Engine control relay
•Fuel pump relay 2, 3
• A/C relay
•Ignition coil
• Fan controller
• Condenser fan relay (HI)
•Condenser fan relay
(LOW)
•Engine warning lamp
•Diagnosis output
• Alternator G terminal
•Intercooler water spray
relay
•Intercooler water spray
lamp
Engine ECU
6.Purge control
solenoid valveCanister
7.Secondary air
control solenoid valveFrom fuel tank
Secondary
air valveBypass
valve
1. O2sensor
3.Fuel pressure
control solenoid valve
4.Throttle
position
sensor
7. Barometric pressure
sensor
3. Air intake
sensor2. Air flow sensor
4. No.1
wastegate
solenoid valve
5.No.2 wastegate
solenoid valve
Only operates on 6M/TWastegate actuatorFuel pressure
regulator
1. Injector5.Cam position sensor8.Water temperature sensor
9.Knock sensor
Crack angle sensor
Catalytic converter Air
intakeCheck
valve
2.ISC servo
Vacuum
tank
From fuel
pump To fuel
tank

MPI – Troubleshooting13A3
Connector inspection : B32
Change No.2 wastegate solenoid valve.
Check connector:B19X
Inspect, repair harness between No.2 wastegate
solenoid valve and engine control relay.
• Check for broken wire and shorting.
Check connector:C49
Replace engine ECU
Check harness between No.2 wastegate
solenoid valve and engine ECU.
• Check output wire to see if broken or shorting.
Check connector: C49
Replace engine ECU.
B32 No.2: measure at wastegate solenoid valve
connector
• Undo connector and take measurement on
solenoid valve side
• Resistance between 1 and 2
OK:29 35Ω(at 20˚C)
Measure at B32 No.2 waste gate solenoid valve
connector.
• Undo connector and take measurement on
harness side.
• Ignition switch ON:
• Resistance between 1 – earth
OK:battery voltage
Measurement at C49 engine ECU connector
•Engine ECU terminal voltage measurement
• Ignition switch: ON
• Voltage between 6 – Earth
OK:battery voltage
Check harness between No.2 wastegate
solenoid valve and engine ECU.
• Check for damage to output wire.
Check harness between No.2 wastegate
solenoid valve and engine control relay.
•Check for damage to power supply cable.
TROUBLESHOOTING
1.Inspection procedures for different types of malfunction
Inspection procedure 37
No.2 Wastegate solenoid valve system <6M/T>
The No.2 wastegate solenoid valve controls excess pressure
introduced via the turbocharger wastegate actuator.
Assumed cause of concern
• No.2 wastegate solenoid valve malfunction
• Engine ECU malfunction
Repair
Repair
Repair
Repair
OK
OK
OK
OK
OK
OK
OK
NG
NG
NG
NG
NG
NG
NG
NGRepair
NGRepair
Repair
OK OK OK

MPI – TROUBLESHOOTING13A4
2.ENGINE ECU CHECKS
21 List of terminal voltages
22 List of resistances and conductance between harness side connector – terminal
Terminal No.Check itemCheck item (engine condition)Normal value
41No.1 wastegate
solenoid valveIgnition switch ONBattery voltage
Engine: warm, idling (using premium petrol)1V or less
6No.2 wastegate
solenoid valve
<6M/T>Ignition switch: ONBattery voltage
Accelerating in 2nd gear with throttle full open (at least 3500 rpm)Voltage decrease
Terminal No.Check itemStandard value, normal condition (check condition)
4147No.1 wastegate solenoid valve2935Ω(at 20˚C)
647No.2 wastegate solenoid valve <6 M/T>2935 Ω(at 20˚C)