oil MITSUBISHI LANCER EVOLUTION VI 1999 Manual Online

MPI – Troubleshooting13-44
INSPECTION PROCEDURE 32
Ignition circuit system
Probable cause
The engine-ECU interrupts the ignition coil primary current by turning the power transistor
inside the engine-ECU ON and OFF.
Malfunction of ignition switch.

Improper connector contact, open or short-circuited
harness wire

Malfunction of the engine-ECU
Measure at the ignition coil connectors A-110, A-111.

Disconnect the connector and measure at the harness side.
1. Voltage between 1 and earth (Ignition switch: ON)
OK:System voltage
2. Continuity between 2 and earth
OK:Continuity1. NGCheck the following
connectors: B-65, B-76NG
Repair
OK
Check trouble symptom.
NG
Check the harness wire
between ignition coil and
ignition switch connector.NG
Repair
OK
Check the ignition switch. 2. NG
Check the harness wire between ignition coil connector and earth,
and repair if necessary.
OK
Check the following
connectors:
A-110, A-111NG
Repair
OK
Check trouble symptom.NGCheck ignition coil and power transistor unit system. (Refer to
P.13-16, INSPECTION PROCEDURE FOR DIAGNOSIS CODE
44.)
INSPECTION PROCEDURE 33
Idle speed control (ISC) servo (Stepper motor) system
Probable cause
The engine-ECU controls the intake air volume during idling by opening and closing
the servo valve located in the bypass air passage.
Malfunction of ISC servo

Improper connector contact, open or short-circuited
harness wire

Malfunction of the engine-ECU
Check the ISC servo.NG
Replace
OK
Measure at the ISC servo connector A-18.

Disconnect the connector and measure at the harness side.

Voltage between 2 and earth, and 5 and earth (Ignition switch:
ON)
OK:System voltageNGCheck the harness wire between control relay and ISC servo con-
nector, and repair if necessary.
OK
Measure at the engine-ECU connector B-59.

Disconnect the connector, measure at the harness side.

Voltage between each of 4, 5, 17, 18 and earth (Ignition switch:
ON)
OK:System voltageNGCheck the following
connector: A-18NG
Repair
OK
Check trouble symptom.
NG
Check harness wire between engine-ECU and ISC servo connector,
and repair if necessary.
OK
Check the following
connector: B-59NG
Repair
OK
Check trouble symptom.NGReplace the engine-ECU.

MPI – Troubleshooting13-47
INSPECTION PROCEDURE 37
MUT-II: Inspection of no initial combustion
MUT-II Data list
16 engine-ECU power supply voltage (Refer to P.13-57.)NGCheck the power supply and ignition switch-IG system.
(Refer to P.13-35, INSPECTION PROCEDURE 24.)
OK
Does the camshaft rotate at the engine cranking?
(When oil filler cap is removed.)NoCheck timing belt for breakage.
Ye s
MUT-II Self-Diag code
Are diagnosis codes displayed?Ye sRefer to P.13-8, INSPECTION CHART FOR DIAGNOSIS CODES.
No
MUT-II Data list
22 Crank angle sensor
OK:Cranking speed is displayed.NGCheck the crank angle sensor system.
(Refer to P.13-11, INSPECTION PROCEDURE FOR DIAGNOSIS
CODE 22.)
OK
MUT-II Actuator test
07 Fuel pump (Refer to P.13-61.)NGCheck the fuel pump system.
(Refer to P.13-36, INSPECTION PROCEDURE 25.)
OK
MUT-II Data list
21 Engine coolant temperature sensor (Refer to P.13-57.)NGCheck the engine coolant temperature sensor system.
(Refer to P.13-10, INSPECTION PROCEDURE FOR DIAGNOSIS
CODE 21.)
INSPECTION PROCEDURE 38
Ignition system: Inspection of no initial combustion.
OK
Check the ignition timing when cranking.
OK:Approx. 5BTDCNGCheck that the crank angle sensor and the timing belt cover are
installed properly.
NGCheck the ignition circuit system.
(Refer to P.13-44, INSPECTION PROCEDURE 32.)Check by connecting a timing light to the spark plug cable.
OK:Timing light flashes during cranking.

MPI – Troubleshooting13-60
Item
No.Inspection
itemInspection contentsNormal conditionInspection
procedure
No.Reference
page
44Ignition coils
and power
transistors
having warmed up

Timing lamp is set.
(The timing lampEngine is idling3ATDC –
13BTDC––
TION-IV>
(tgp
is set in order to
check actual
ignition timing.)2,500 r/min24 – 44BTDC
44Ignition coils
and power
transistors

Engine: After
having warmed up

Timing lamp is set
Engine is idling0 – 13BTDC––
transistors
TION-V, VI>
Timing lamp is set.
2,500 r/min24 – 44BTDC
45ISC
(stepper)
motor
position *

Engine coolant
temperature: 80 –
90C

Lam
ps, electric
A/C switch: OFF2 – 25 steps––
position
Lamps, electric
cooling fan and all
accessories: OFF

Transmission:
Neutral (A/T :
P range)
Idl iti
A/C switch:
OFF → ONIncreases by
10 – 70 steps
g)

Idle position
switch: ON

Engine: Idling

When A/C switch
is ON, A/C
compressor should
be operating
A/C switch: OFF

Select lever:
N range →
D rangeIncreases by
5 – 50 steps
49A/C relayEngine: After having
warmed up/Engine is
idlingA/C switch: OFFOFF (Compressor
clutch is not
operating)Procedure
No. 2913-39
A/C switch: ONON (Compressor
clutch is
operating)
NOTE
*: In a new vehicle [driven approximately 500 km or less], the stepper motor has sometimes 30 steps
greater than the standard value.
Caution
When shifting the select lever to D range, the brakes should be applied so that the vehicle does
not move forward.

MPI – Troubleshooting13-63
ENGINE-ECU INSPECTION
TERMINAL VOLTAGES
Engine ECU connector
Terminal
No.Check itemCheck condition (Engine condition)Normal condition
1No.1 injectorWhile engine is idling after having been warmed up,
suddenly depress the accelerator pedal
Momentarily drops
slightlyfrom 1114V
14No.2 injector
suddenly depress the accelerator pedal.slightly from 11 – 14 V.
2No.3 injector
15No.4 injector
3Fuel pressure control
valve
Ignition switch: ONSystem voltage
valve
Engine: Cranking to idling (within about two minutes)0 – 3 V to sytem
voltage
4Stepper motor coil (A1)Engine: Immediately after engine has been started
f
or warming up
Changes repeatedly
f
rom system voltage
17Stepper motor coil (A2)
for warming upfrom system voltage
to 0 – 6 V and from 0
6 V to system5Stepper motor coil (B1)– 6 V to system
voltage.
18Stepper motor coil (B2)
6Secondary air control
solenoid valveIgnition switch: ONSystem voltage
8Fuel pump relayIgnition switch: ONSystem voltage
Engine: Idling0 – 3 V
10Power transistor unit
(A)Engine speed: 3,000 r/min0.3 – 3.0 V
23Power transistor unit
(B)
11Wastegate solenoid
valve
Ignition switch: ONSystem voltage
valve
Engine: At idle after having been warmed up (when
premium gasoline is used)0 – 3 V
12Power supplyIgnition switch: ONSystem voltage
25
19Air flow sensor reset
signal
Engine: Idling0 – 1 V
signal
Engine speed: 3,000 r/min6 – 9 V
20Fan motor relay (HI)
Fan not operating (coolant temperature: 90C or
below)System voltage
Fan at high speed (coolant temperature: 105C or
above)0 – 3 V

MPI – Troubleshooting13-67
RESISTANCE AND CONTINUITY BETWEEN HARNESS SIDE CONNECTORS AND TERMINALS
Engine-ECU Harness Side Connector Terminal Arrangement
Terminal No.Inspection itemNormal condition (Check condition)
1 – 12No.1 injector2 – 3 Ω (At 20C)
14 – 12No.2 injector
2 – 12No.3 injector
15 – 12No.4 injector
3 – 12Fuel pressure control valve28 – 36 Ω (At 20C)
4 – 12Stepper motor coil (A1)28 – 33 Ω (At 20C)
17 – 12Stepper motor coil (A2)
5 – 12Stepper motor coil (B1)
18 – 12Stepper motor coil (B2)
6 – 12Secondary air control solenoid valve28 – 36 Ω (At 20C)
11 – 12Wastegate solenoid valve62 – 74 Ω (At 20C)
60 – 12Oxygen sensor heater
11 – 18 Ω (at 20C)
13 – Body earthEngine-ECU earthContinuity established (0 Ω)
26 – Body earth
72 – 92Intake air temperature sensor5.3 – 6.7 kΩ (When intake air temperature is 0C)
2.3 – 3.0 kΩ (When intake air temperature is 20C)
1.0 – 1.5 kΩ (When intake air temperature is 40C)
0.30 – 0.42 kΩ (When intake air temperature is 80C)
74 – 77High temperature sensor3 Ω or less
83 – 92Engine coolant temperature sensor5.1 – 6.5 kΩ (When coolant temperature is 0C)
2.1 – 2.7 kΩ (When coolant temperature is 20C)
0.9 – 1.3 kΩ (When coolant temperature is 40C)
0.26 – 0.36 kΩ (When coolant temperature is 80C)
87 – 92Idle position switchContinuity established (when throttle valve is at idle
position)
No continuity (when throttle valve is slightly open)
91 – Body earth–Continuity established

MANUAL TRANSMISSION OVERHAUL – Clutch Housing22B-5
CLUTCH HOUSING
DISASSEMBLY AND REASSEMBLY
4
2
1
3
8 6 7
5*
9.8 Nm
Disassembly steps
1. Clutch release bearing retainer
E2. Oil seal
AD3. Outer race
BC4. Outer raceB5. Bushing*
A6. Cover-A
A7. Cover-B
8. Clutch housing
NOTE:
(1)*: Never remove the bushings from the clutch housing.
Only the case when installing new bushings into a new clutch housing, refer to B.
(2) For each service point, refer to Basic Manual. (Pub. No. S9806CNCP9)

MANUAL TRANSMISSION OVERHAUL – Reverse Idler Gear22B-6
REVERSE IDLER GEAR
DISASSEMBLY AND REASSEMBLY
Apply gear oil to all
moving parts before
installation.
5
4321
6
7
Disassembly steps
1. Snap ring
2. Cone spring
(except EVOLUTION-IV)
3. Thrust washer
4. Steel ball
(except EVOLUTION-IV)
5. Reverse idler gear
6. Needle roller bearing
7. Reverse idler gear shaft
INSPECTION
NEEDLE ROLLER BEARING
(1) Check to ensure that when the shaft and gear are combined
and made to rotate, they rotate smoothly without looseness
and noise.
(2) Check to ensure that the cage is not deformed.

27-1
REAR AXLE
CONTENTS
GENERAL 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Outline of Change 2. . . . . . . . . . . . . . . . . . . . . . . . .
SERVICE SPECIFICATIONS 2. . . . . . . . . . . . . .
LUBRICANT 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SPECIAL TOOLS 3. . . . . . . . . . . . . . . . . . . . . . . .
TROUBLESHOOTING 4. . . . . . . . . . . . .
ON-VEHICLE SERVICE
31. . . . . . . . . . . . . . .
Rear Axle Total Backlash Check 31. . . . . . . . . . .
Gear Oil Level Check 31. . . . . . . . . . . . . . . . . . . .
Gear Oil Change 32. . . . . . . . . . . . . . . . . . . . . . . . .
Fluid Level Check 33. . . . . . . . . . . . . . . . . . . . . . . . Bleeding 34. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
AYC Operation Check 34. . . . . . . . . . . . . . . . . . . .
Hydraulic Pressure Check 35. . . . . . . . . . . . . . . . .
Differential Carrier Oil Seal
Replacement 36. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Wheel Speed Sensor Output Voltage
Measurement 37. . . . .
Action When Battery Runs Out 38. . . . . . . . . . . .
HYDRAULIC UNIT
39. . . . . . . . . . . . . . .
SENSOR RELAY
41. . . . . . . . . . . . . . .
AYC-ECU 42. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

REAR AXLE – General / Service Specifications / Lubricant27-2
GENERAL
OUTLINE OF CHANGE

The descriptions of the service procedures for the AYC system including the troubleshooting using
an MUT-II tester has been incorporated.
SERVICE SPECIFICATIONS

ItemsStandard valueLimit
Rear axle total backlash mm–5
Pressure generated by hydraulic unit MPa0 – 1.6–
Wheel bearing axial play mm–0.05
Wheel bearing rotation starting torque Nm–1.0 or less
LUBRICANT

ItemsSpecified lubricantCapacity
Gear oilTorque
transfer
differential
DifferentialHypoid gear oil API classification GL-5 or higher
SAE viscosity No. 90, 80W0.41 ± 0.02

differentialTorque transfer
mechanismMITSUBISHI GENUINE DIA QUEEN AYC FLUID0.700
0.05

Hydraulic piping fluidDia Queen ATF SPII or equivalent1

Torque transfer mechanism oil seal lipsVaselineAs required

REAR AXLE – Special Tools27-3
SPECIAL TOOLS
ToolNumberNameUse
MB991502MUT-II sub-
assemblyInspection of AYC
(diagnosis display by MUT-II)
MB991529Diagnosis code
check harnessInspection of AYC
(diagnosis display by AYC warning lamp)
MD998330
(MD998331)Oil pressure
gauge
(2,942 kPa)Hydraulic pressure measurement

MB991705Hose adapter
MB990925Bearing & oil seal
installer setPressfitting of oil seal
MB991115Oil seal installerPressfitting of oil seal
(used in combination with MB990938)
MD998812Installer capPressfitting of oil seal nism of vehicles with AYC>
MD998813Installer 100
MD998829Installer adapter
(60)