Mitsubishi Lancer Evolution 8 MR. Manual - part 14

MPI – Troubleshooting

13A-3

Connector inspection : B-32

Change No.2 wastegate solenoid valve.

Check connector: B-19X

Inspect, repair harness between No.2 wastegate
solenoid valve and engine control relay.
• Check for broken wire and shorting.

Check connector: C-49

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: C-49

Replace engine ECU.

B-32 No.2: measure at wastegate solenoid valve
connector
• Undo connector and take measurement on

solenoid valve side

• Resistance between 1 and 2

OK: 29 - 35

Ω

(at 20˚C)

Measure at B-32 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 C-49 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

MPI – TROUBLESHOOTING

13A-4

2. ENGINE ECU CHECKS

2-1 List of terminal voltages

2-2 List of resistances and conductance between harness side connector – terminal

Terminal No.

Check item

Check item (engine condition)

Normal value

No.1 wastegate
solenoid valve

Ignition switch ON

Battery voltage

Engine: warm, idling (using premium petrol)

1V or less

No.2 wastegate
solenoid valve
<6M/T>

Ignition switch: ON

Battery voltage

Accelerating in 2nd gear with throttle full open (at least 3500 rpm)

Voltage decrease

Terminal No.

Check item

Standard value, normal condition (check condition)

41-47

No.1 wastegate solenoid valve

29-35

Ω

(at 20˚C)

6-47

No.2 wastegate solenoid valve <6 M/T>

29-35

Ω

(at 20˚C)

13B-1

FUEL SUPPLY GENERAL, FUEL TANK

SECTION 13B

FUEL SUPPLY

CONTENTS

General........................................................1

Fuel tank .....................................................1

General

As well as changing the filler neck hose clamp from an M6 x 39 to M6 x 49, the mounting position has been changed. There
were no changes other than the following.

Fuel Tank

Removal and fitting

Cross section A – A

Rear cross member

NOTE
Fit the filler neck hose clamp so that it does not interfere with the rear cross member.

15-1

INTAKE, EXHAUST GENERAL, SERVICING STANDARD VALUES, VEHICLE SERVICING

SECTION 15

INTAKE, EXHAUST

CONTENTS

General........................................................1
Servicing standard values ........................1
Vehicle Servicing .......................................1

1. Turbocharger boost pressure check ..................1
2. Checking boost pressure control system ..........2

Air cleaner ..................................................3

General

The important service points were added as a result of the following changes. Other service points remain the same.
• Change to the turbocharger boost pressure (on 6M/T)
• Change from one to two wastegate solenoid valves. However, the No.2 wastegate on the 5M/T is not functional.

Servicing Standard Values

ITEM

STANDARD VALUE

Turbocharger boost pressure kPa <6M/T>

97-144

Vehicle servicing

1. Checking turbocharger boost pressure

<5M/T>
Since the No.2 wastegate solenoid valve does not function, the
same check of the No.1 wastegate solenoid valve as before is
carried out.
6M/T
Note
The driving test, which is done with the throttle fully open,
must be done in a safe place with two people in the vehicle.
The person sitting in the passenger seat should take the
reading of the values on the pressure gauge.

(1) Remove the hose (black) from the No.1 wastegate solenoid

valve, and fit the pressure gauge to this hose. Fit a plug to
solenoid valve nipple from which the hose (black) has been
removed.

(2) Remove the No.2 wastegate solenoid valve connector.
(3) Accelerate at full throttle in 2nd gear, and then take the boost

pressure measurement when engine speed gets to at least
3,000rpm.

Standard value: 97 – 144kPa

(4) When the boost pressure is lower than the standard value, the

cause could be one of the following:

1. Wastegate actuator misoperation
2. Boost pressure leak
3. Turbocharger NG

(5) When boost pressure is higher than standard value, the boost

pressure control may be faulty, so please check the following
points.

Air cleaner

No.1 Wastegate
solenoid valve
No.2 Wastegate
solenoid valve

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