display MITSUBISHI LANCER EVOLUTION VI 1999 User Guide

MPI – Troubleshooting13-32
INSPECTION PROCEDURE 17
The feeling of impact or vibration when decelerating
Probable cause
Malfunction of the ISC servo system is suspected.
Malfunction of the ISC servo system
MUT-II Self-Diag code
Are diagnosis codes displayed?Ye sRefer to P.13-8, INSPECTION CHART FOR DIAGNOSIS CODES.
No
Check the ISC servo for operation sound.NGCheck the ISC servo system.
(Refer to P.13-44, INSPECTION PROCEDURE 33.)
OK
MUT-II Data list
14 Throttle position sensor (Refer to P.13-57.)NGCheck the throttle position sensor system. (Refer to P.13-9, IN-
SPECTION PROCEDURE FOR DIAGNOSIS CODE 14.)
OK
MUT-II Data list
26 Idle position switch (Refer to P.13-58.)NGCheck the idle position switch system.
(Refer to P.13-38, INSPECTION PROCEDURE 26.)
OK
Clean the throttle valve area.
INSPECTION PROCEDURE 18
Poor acceleration
Probable cause
Defective ignition system, abnormal air-fuel ratio, poor compression pressure, etc.
are suspected.
Malfunction of the ignition system

Malfunction of air-fuel ratio control system

Malfunction of the fuel supply system

Poor compression pressure

Clogged exhaust system

Malfunction of the turbocharger system
MUT-II Self-Diag code
Are diagnosis codes displayed?Ye sRefer to P.13-8, INSPECTION CHART FOR DIAGNOSIS CODES.
No
Check the injectors for operation sound.NGCheck the injector system. (Refer to P.13-15, INSPECTION PRO-
CEDURE FOR DIAGNOSIS CODE 41.)
OK
Check the ignition timing.
(Refer to GROUP 11 – Engine Adjustments.)*NGCheck that the crank angle sensor and the timing belt cover are
installed properly.
OK
MUT-II: Check if hesitation, sag, stumble or poor acceleration occur.
(Refer to P.13-51, INSPECTION PROCEDURE 43.)
OK
Check the fuel pressure. (Refer to P.13-30.)*
OK
Check the following items.

Check the ignition coil, spark plugs, spark plug cables.

Check the turbocharger boost pressure.

Check the boost pressure control system.

Check the turbocharger turbine wheel for smooth rotation.

Check the compression pressure.

Check the fuel filter or fuel line for clogging.

Broken air intake hose

Clogged air cleaner

Clogged exhaust system
NOTE
*: Refer to Workshop Manual for LANCER EVOLUTION-IV and EVOLUTION-V (Pub. No. S9806CNCP9).

MPI – Troubleshooting13-33
INSPECTION PROCEDURE 19
Surge
Probable cause
Defective ignition system, abnormal air-fuel ratio, etc. are suspected.
Malfunction of the ignition system

Malfunction of air-fuel ratio control system
MUT-II Self-Diag code
Are diagnosis codes displayed?Ye sRefer to P.13-8, INSPECTION CHART FOR DIAGNOSIS CODES.
No
Check the injectors for operation sound.NGCheck the injector system. (Refer to P.13-15, INSPECTION PRO-
CEDURE FOR DIAGNOSIS CODE 41.)
OK
Check the ignition timing.
(Refer to GROUP 11 – Engine Adjustments.)*NGCheck that the crank angle sensor and the timing belt cover are
installed properly.
OK
MUT-II: Check if surge occurs.
(Refer to P.13-52, INSPECTION PROCEDURE 44.)
OK
Check the fuel pressure. (Refer to P.13-30.)*
OK
Check the following items.

Check the ignition coil, spark plugs, spark plug cables.

Check the waste gate actuator.
NOTE
*: Refer to Workshop Manual for LANCER EVOLUTION-IV and EVOLUTION-V (Pub. No. S9806CNCP9).
INSPECTION PROCEDURE 20
Knocking
Probable cause
In cases as the above, the cause is probably that the detonation control is defective
or the heat value of the spark plug is inappropriate.
Defective detonation sensor

Inappropriate heat value of the spark plug
MUT-II Self-Diag code
Are diagnosis codes displayed?Ye sRefer to P.13-8, INSPECTION CHART FOR DIAGNOSIS CODES.
No
Does knocking occur when driving with the sensor disconnected?
At this time, use the MUT-II to check if the timing is retarded
compared to when the detonation sensor connector is con-
nected.NoCheck the detonation sensor system. (Refer to P.13-15, INSPEC-
TION PROCEDURE FOR DIAGNOSIS CODE 31.)
Ye s
Check the following items.

Spark plugs

Check if foreign materials (water, alcohol, etc.) got into fuel.
INSPECTION PROCEDURE 21
Dieseling
Probable cause
Fuel leakage from injectors is suspected.
Fuel leakage from injectors
Check the injectors for fuel leakage.

MPI – Troubleshooting13-34
INSPECTION PROCEDURE 22
Too high CO and HC concentration when idling
Probable cause
Abnormal air-fuel ratio is suspected.
Malfunction of the air-fuel ratio control system

Deteriorated catalyst
Check trouble symptom.
No
Check the ignition timing.
(Refer to GROUP 11 – Engine Adjustments.)*NGCheck that the crank angle sensor and the timing belt cover are
installed properly.
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.)
OK
MUT-II Data list
13 Intake air temperature sensor (Refer to P.13-56.)NGCheck the intake air temperature sensor system. (Refer to P.13-9,
INSPECTION PROCEDURE FOR DIAGNOSIS CODE 13.)
OK
MUT-II Data list
25 Barometric pressure sensor (Refer to P.13-58.)NGCheck the barometric pressure sensor system. (Refer to P.13-14,
INSPECTION PROCEDURE FOR DIAGNOSIS CODE 25.)
OK
MUT-II Data list
11 Oxygen sensor
OK:600–1,000 mV when racing suddenlyNGCheck the oxygen sensor system. (Refer to P.13-15, INSPECTION
PROCEDURE FOR DIAGNOSIS CODE 31.)
OK
MUT-II Data list
11 Oxygen sensor
OK:Repeat 0–400 mV and 600–1,000 mV alternately when
idling.OK
NG
Check the fuel pressure. (Refer to P.13-30.)*
OK
NG
Check the following items.

Check the injectors for operation sound.

Check the injectors for fuel leakage.

Check the ignition coil, spark plugs, spark plug cables.

Check the compression pressure.

Check the positive crankcase ventilation system.

Check the evaporative emission control system.
Check the trouble symptom.
NG
Replace the catalytic converter.
Replace the oxygen sensor.
MUT-II Self-Diag code
Are diagnosis codes displayed?Ye sRefer to P.13-8, INSPECTION CHART FOR DIAGNOSIS CODES.
NOTE
*: Refer to Workshop Manual for LANCER EVOLUTION-IV and EVOLUTION-V (Pub. No. S9806CNCP9).

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 – Troubleshooting13-48
INSPECTION PROCEDURE 39
MUT-II: Check if uncomplete combustion occurs.
MUT-II Self-Diag code
Are diagnosis codes displayed?Ye sRefer to P.13-8, INSPECTION CHART FOR DIAGNOSIS CODES.
No
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 PROCEDURES FOR DIAGNOSIS
CODE 21.)
OK
MUT-II Data list
18 Ignition switch-ST (Refer to P.13-57.)NGCheck the ignition switch-ST system.
(Refer to P.13-38, INSPECTION PROCEDURE 27.)
INSPECTION PROCEDURE 40
Check if hunting occurs.
Clean the throttle body.
Check and adjust the fixed SAS. (Refer to P.13-30.)*
Check trouble symptom.
NG
Inspect the intake of air into the air intake system

Broken intake manifold gasket

Broken air intake hose

Broken vacuum hose

Positive crankcase ventilation valve does not operate.
NOTE
*: Refer to Workshop Manual for LANCER EVOLUTION-IV and EVOLUTION-V (Pub. No. S9806CNCP9).

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
<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)

REAR AXLE – Troubleshooting <AYC>27-25
DATA LIST REFERENCE TABLE
The following items can be read by t01he MUT-

from the ECU input data.
Item No.
Check itemChecking requirementsNormal value
01Front-right wheel speedPerform a test run.Vehicle speeds
displayed on the
02Front-left wheel speed
displayed on the
speedometer and
MUTIIare identi03Rear-right wheel speedMUT-II are identi-
cal.
04Rear-left wheel speed
05Front-right wheel speed
(0.2 km/h)
06Front-left wheel speed (0.2
km/h)
07Rear-right wheel speed
(0.2 km/h)
08Rear-left wheel speed (0.2
km/h)
10Vehicle speed
11System voltageIgnition switch: ONBattery voltage
15TPS openingAccelerator pedal position/Igni-
tion switch: ON
Fully closed300 – 1000mV
tion switch: ON
Partially openGradually increases
from the above val-
ue.
Fully open4500 – 5000mV
19Longitudinal acceleration
sensor
Vehicle stands on level ground2.4 – 2.6V
sensor
Perform a test run.Reading fluctuates
up or down with 2.5V
as its center.
20Lateral acceleration sensorVehicle stands on level ground2.4 – 2.6V
Perform a test run.Reading fluctuates
up or down with 2.5V
as its center.
22Steering wheel operationSteering wheel turning direction
Ignition switch: ON90 deg. clock-
wiseR90 deg
90 deg counter-
clockwiseL90 deg
23Steering wheel turning
angular velocity
Steering wheel position
Ignition switch: ON
Not turned0 deg/s
angular velocityIgnition switch: ON
TurnedReading varies ac-
cording to turning
speeds.
45Idle position switchAccelerator pedal position
Ignition position: ON
Not depressedON
Ignition position: ON
DepressedOFF

SRS – Troubleshooting52B-6
TROUBLESHOOTING
STANDARD FLOW OF DIAGNOSTIC TROUBLESHOOTING
Refer to GROUP 00 – How to Use Troubleshooting/Inspection Service Points.
DIAGNOSIS FUNCTION
DIAGNOSIS CODES CHECK
Connect the MUT-II to the diagnosis connector (16-pin) under the instrument under cover, then check
diagnosis codes.
(Refer to GROUP 00 – How to Use Troubleshooting/Inspection Service Points.)
ERASING DIAGNOSIS CODES
Connect the MUT-II to the diagnosis connector and erase the diagnosis code.
Caution
Turn off the ignition switch before connecting or disconnecting the MUT-II.
INSPECTION CHART FOR DIAGNOSIS CODES
Inspect according to the inspection chart that is appropriate for the malfunction code.
Code No.Diagnosis itemReference page
14Analog G-sensor system in the SRS-ECU52B-7
15,16Safing G-sensor system in the SRS-ECU52B-7
21, 22, 61, 62Driver’s side air bag module (squib) system52B-8
24, 25, 64, 65Front passenger’s side air bag module (squib) system52B-9
31, 32SRS-ECU capacitor system52B-9
34*Connector lock system52B-10
35SRS-ECU (deployed air bag) system52B-10
41*IG1 (A) power circuit system52B-10
42*IG1 (B) power circuit system52B-11
43SRS warning lamp drive circuit
system
Lamp does not illuminate.*52B-12
systemLamp does not switch off.52B-12
44SRS warning lamp drive circuit system52B-13
45SRS-ECU non-volatile memory (EEPROM) and A/D converter system52B-13
51, 52Driver’s side air bag module (squib ignition drive circuit) system52B-13
54, 55Front passenger’s side air bag module (squib ignition drive circuit) system52B-13
NOTE
(1) *: If the vehicle condition returns to normal, the diagnosis code will be automatically erased, and the SRS warning
lamp will return to normal.
(2) If the vehicle has a discharged battery it will store the fault codes 41 or 42. When these diagnosis codes are
displayed, check the battery.

SRS – Post-collision Diagnosis52B-19
POST-COLLISION DIAGNOSIS
To inspect and service the SRS after a collision (whether
or not the air bags have deployed), perform the following
steps.
SRS-ECU MEMORY CHECK
1. Connect the MUT-II to the diagnosis connector (16-pin).
Caution
Make certain that the ignition switch is OFF when
the MUT-II is connected or disconnected.
2. Read (and write down) all displayed diagnosis codes.
(Refer to P.52B-6.)
NOTE
If the battery power supply has been disconnected or
disrupted by the collision, the MUT-II cannot communicate
with the SRS-ECU. Inspect and, if necessary, repair the
body wiring harness before proceeding further.
3. Read the data list (fault duration and how many times
memories are erased) using the MUT-II.
Data list
NoService Data ItemApplicability
92Number indicating houw often the memory is clearedMaximum time to be stored: 250
93How long a problem has lasted (How long it takes
from the occurrence of the problem till the first igniting
signal)Maximum time to be stored: 9,999 minutes
(approximately 7 days)
94How long a problem has lasted (How long it takes
from the first igniting signal till now)
4. Erase the diagnosis codes and after waiting 5 seconds
or more read (and write down) all displayed diagnosis
codes. (Refer to P.52B-6.)

CHASSIS ELECTRICAL – Ignition Switch and Immobilizer System54-13
IGNITION SWITCH AND IMMOBILIZER SYSTEM
<EVOLUTION-VI WITH IMMOBILIZER SYSTEM>
SPECIAL TOOL
ToolNumberNameUse
MB991502MUT-II sub
assembly
Immobilizer system check
(Diagnosis display using the MUT-II)

Registration of the ID code
TROUBLESHOOTING
Caution
The ID code should always be re-registered when replacing the immobilizer-ECU.
STANDARD FLOW OF DIAGNOSIS TROUBLESHOOTING
Refer to GROUP 00 – How To Use Troubleshooting/Inspection Service Points.
DIAGNOSIS FUNCTION
DIAGNOSIS CODES CHECK
Refer to GROUP 00 – How To Use Troubleshooting/Inspection Service Points.
ERASING DIAGNOSIS CODES
Refer to GROUP 00 – How To Use Troubleshooting/Inspection Service Points.
Caution
The diagnosis codes which result from disconnecting the battery cables cannot be erased.
INSPECTION CHART FOR DIAGNOSIS CODES
Diagnosis code No.Inspection itemsReference
page
11Transponder communication system54-14
12*ID code are not the same or are not registered54-14
21Communication system between MUT-II and engine-ECU54-15
31EEPROM abnormality inside immobilizer-ECU54-15
NOTE
*: Diagnosis code No. 12 is not recorded.