2004 MITSUBISHI LANCER EVOLUTION VIII ECU

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)

INTAKE, EXHAUST – AIR CLEANER153
Air Cleaner
Removal and Fitting
Note
The parts marked with a symbol are plastic components which contain recycled paper. Please note the following:
•When fixing or removing, or after fitting parts, be careful not to knock or apply force to these components.
• When assembling, fix the air cleaner body ASSY securely to the air cleaner cover using the clamp on the body.
Remarks
Parts marked with a
symbol use plastic that may contain recycled paper, so when scrapped are burnable.
Removal procedure
1.Battery
2. Air duct
3. Air flow sensor connector4.Air cleaner assembly
5.Air flow sensor
6. Gasket
7. Air cleaner cover8.Air cleaner element
9.Air cleaner body assembly
10. Vacuum hose• Air pipe E, air hose D, air bypass valve
assembly, air bypass hose.
• Oil level gauge assembly11.Air intake hose
12.Wastegate solenoid valve connector
13. Vacuum hose connection
14. Wastegate solenoid valve assembly15.Air cleaner bracket

MANUAL TRANSMISSION TROUBLESHOOTING222
2. Check procedures by diagnosis code
Remarks
In cases where other diagnosis codes are output, please refer to the relevant item.
Code No.12 Power supply voltage (valve power supply) systemAssumed cause of concern
If the 4WDECU power supply voltage drops below 9V or rises
above 18V, Code No.12 is output, indicating either a broken wire in
the power supply circuit, a short, or a drop in the battery voltage.• battery malfunction
• harness, connector malfunction
• 4WDECU malfunction
Battery inspection
NG > replace
MUTII/III Service data
• No.10 Battery voltage
OK:battery voltage
OK > Intermittent malfunction
Measurement at C38 4WDECU connector
•ECU terminal voltage measurement
• Ignition switch: ON
OK:battery voltage
Connector check: C38
NG > repair
MUTII/III Service data
•No.10 battery voltage
OK:battery voltage
NG > replace 4WDECU
OK > intermittent malfunction
Connector check:C38, C133, C212, C210
NG > repair
Check harness between ignition switch – 4WDECU
• Check to see if power supply wire broken, short, or
damage
NG > repair
OK
OK
OK
OK
NG
NG

MANUAL TRANSMISSION TROUBLESHOOTING223
Vehicle speed sensor fitting check
NG > repair
MUTII/III Service Data
• No.01 Vehicle speed sensor
•No.02 Vehicle speed sensor
• No.03 Vehicle speed sensor
OK:Speed shown on speedometer and MUTII/III agree
OK > Intermittent malfunction
Measurement at C38 4WDECU connector
• Undo connector and take measurement on harness
side
(1) Resistance between 9 – 22 (vehicle speed sensor )
(2) Resistance between 6 19 (vehicle speed sensor )
(3) Resistance between 7 20 (vehicle speed sensor )
(4) Resistance between 8 – 21 (vehicle speed sensor )
OK:1.2 – 1.6 kΩ
To next pageVehicle wheel speed sensor check
(Refer to Group 35B – Vehicle wheel speed sensor)
*1
NG > Replace
Connector checks:C38, A05, A31, D11, D05,
D12, C131, C20, C115, C34
NG > Repair
Harness check between 4WDECU – each vehicle
wheel speed sensor
MUTII/III Service data
•No.1 Vehicle speed sensor
•No.2 Vehicle speed sensor
• No.3 Vehicle speed sensor
• No.4 Vehicle speed sensor
OK: Speed shown on speedometer and MUTII/III agreeNG > Replace 4WDECU
OK > Intermittent malfunction
Code No.21 Vehicle wheel speed sensor systems
Code No.22 Vehicle wheel speed sensor systems
Code No.23 Vehicle wheel speed sensor systems
Code No.24 Vehicle wheel speed sensor systemsAssumed cause of concern
When one of the vehicle wheel speed sensors detects a
vehicle speed of 15kph or more, and when even one of the
remaining 3 sensors cannot detect vehicle speed, the
diagnosis code for wheel speed sensor broken wire or short is
output.• Wheel speed sensor malfunction
• Rotor malfunction
•Wheel bearing malfunction
• Harness, connector malfunction
• 4WDECU malfunction

Remarks*1: refer to ’005 Lancer Sedia Service Manual (No.1036K00)*2: refer to ’011 Lancer Evolution VII Service Manual (No.1036K02)
OK
OK
OK
OK
OK
NG
NG

MANUAL TRANSMISSION TROUBLESHOOTING224
From previous page
Check vehicle wheel speed sensor output voltage (ref.
p.2241)
*2
Check connector: C38
NG > Repair
MUTII/III Service data
• No.1 Vehicle speed sensor
•No.2 Vehicle speed sensor
• No.3 Vehicle speed sensor
• No.4 Vehicle speed sensor
OK:Speed shown on speedometer and MUTII/III
agree
NG > Replace 4WDECU
OK > Intermittent malfunctionVehicle speed sensor and rotor check
(Refer to Group 35B – Vehicle wheel speed sensor)
*1
NG > Repair
Wheel bearing check (Refer to Group 26 – Vehicle
Servicing, Group 27B – Rear Hub Assembly)
*2
NG > Repair
NG
OK
OK
OK

Vehicle speed sensor fitting check
NG > repair
MUTII/III Service Data
• No.01 Vehicle speed sensor
• No.02 Vehicle speed sensor
• No.03 Vehicle speed sensor
• No.04 Vehicle speed sensor
OK:Speed shown on speedometer and MUTII/III agree
OK > Intermittent malfunction
Measurement at C38 4WDECU connector
•Undo connector and take measurement on harness
side
(1) Resistance between 9 – 22 (vehicle speed sensor
)
(2) Resistance between 6 19 (vehicle speed sensor
)
(3) Resistance between 7 20 (vehicle speed sensor
)
(4) Resistance between 8 – 21 (vehicle speed sensor
)
OK:1.2 – 1.6kΩ
Check vehicle wheel speed sensor output voltage (ref.
p.2241)
*2
Check connector:C38
NG > repair
MUTII/III Service data
• No.1 Vehicle speed sensor
• No.2 Vehicle speed sensor
• No.3 Vehicle speed sensor
OK:Speed shown on speedometer and MUTII/III
agree
NG > Replace 4WDECU
OK > Intermittent malfunctionVehicle wheel speed sensor
(Refer to Group 35B – Vehicle wheel speed sensor)
*1
NG > Repair
Connector checks:C38, A05, A31, D11, D05,
D12, C131, C20, C115, C34
NG: Repair
Harness check between 4WDECU – each vehicle
wheel speed sensor
• Check output wire for broken wire, earthing, short
• Check earth wire to see if broken or damaged
NG:repair
MUTII/III Service data
•No.1 Vehicle speed sensor
•No.2 Vehicle speed sensor
• No.3 Vehicle speed sensor
• No.4 Vehicle speed sensor
OK:Speed shown on speedometer and MUTII/III
agree
NG > Replace 4WDECU
OK > Intermittent malfunction
Vehicle wheel speed sensor and rotor check
(Refer to Group 35B – Vehicle Wheel Speed Sensor)
*1
NG > Repair
Wheel bearing check (Refer to Group 26 – Vehicle
Servicing, Group 27B – Rear Hub Assembly)
*2
NG > Repair
MANUAL TRANSMISSION TROUBLESHOOTING225
Code No.25 Abnormal tyre diameterAssumed cause of concern
Abnormal tyre Code No. 25 is output in cases where, when
the steering wheel is in a central position, and vehicle speed
is 20kph or more, there is a discrepancy between one of the
vehicle wheel speed sensors and the average of the 4 wheel
speed sensors, in that it is outside the specified range.However, the warning lamp does not come on.• Tyre malfunction
•Vehicle speed sensor malfunction
• Rotor malfunction
• Wheel bearing malfunction
• Harness, connector malfunction

Remarks*1: refer to ’005 Lancer Sedia Service Manual (No.1036K00)*2: refer to ’011 Lancer Evolution VII Service Manual (No.1036K02)
OK
OK
OK
OK NG
NG
OK
NG
OK
OK
OK

MANUAL TRANSMISSION TROUBLESHOOTING226
Vehicle speed sensor fitting check
NG > repair
MUTII/III Service Data
• No.01 Vehicle speed sensor
• No.02 Vehicle speed sensor
•No.03 Vehicle speed sensor
•No.04 Vehicle speed sensor
OK:Speed shown on speedometer and MUTII/III agree
OK > Intermittent malfunction
Measurement at C38 4WDECU connector
• Undo connector and take measurement on harness
side
(1) Resistance between 9 – 22 (vehicle speed sensor
)
(2) Resistance between 6 19 (vehicle speed sensor
)
(3) Resistance between 7 20 (vehicle speed sensor
)
(4) Resistance between 8 – 21 (vehicle speed sensor
)
OK:1.2 – 1.6kΩ
Check vehicle wheel speed sensor output voltage (ref.
p.2241)
*2
Check connector:C38
NG > repair
MUTII/III Service data
• No.1 Vehicle speed sensor
• No.2 Vehicle speed sensor
• No.3 Vehicle speed sensor
OK:Speed shown on speedometer and MUTII/III
agree
NG > Replace 4WDECU
OK > Intermittent malfunctionVehicle wheel speed sensor
(Refer to Group 35B – Vehicle wheel speed sensor)
*1
NG > Repair
Connector checks:C38, A05, A31, D11, D05,
D12, C131, C20, C115, C34
NG > Repair
Harness check between 4WDECU – each vehicle
wheel speed sensor
• Check output wire for broken wire, earthing, short
• Check earth wire to see if broken or damaged
NG > repair
MUTII/III Service data
•No.1 Vehicle speed sensor
• No.2 Vehicle speed sensor
• No.3 Vehicle speed sensor
• No.4 Vehicle speed sensor
OK:Speed shown on speedometer and MUTII/III
agree
NG > Replace 4WDECU
OK > Intermittent malfunction
Vehicle wheel speed sensor and rotor check
(Refer to Group 35B – Vehicle Wheel Speed Sensor)
*1
NG > Repair
Wheel bearing check (Refer to Group 26 – Vehicle
Servicing, Group 27B – Rear Hub Assembly)
*2
NG > Repair
Code No.26 Vehicle wheel speed sensor system (output
signal abnormal)Assumed cause of concern
Abnormal vehicle wheel speed sensor Code No. 26 is output
in cases where, when the vehicle speed is 20kph or more,
one of the vehicle wheel speed sensors is outside the
specified range. However, the warning lamp does come on.•Tyre malfunction
• Vehicle speed sensor malfunction
•Rotor malfunction
• Wheel bearing malfunction
•Harness, connector malfunction
• 4WDECU malfunction

Remarks*1: refer to ’005 Lancer Sedia Service Manual (No.1036K00)*2: refer to ’011 Lancer Evolution VII Service Manual (No.1036K02)
OK
OK
OK
OK NG
NG
OK
NG
OK
OK
OK