1999 MITSUBISHI LANCER EVOLUTION VI relay

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 – Troubleshooting13-61
8. ACTUATOR TEST REFERENCE TABLE
Item
No.Inspection
itemDrive contentsInspection contentsNormal conditionInspection
procedure
No.Reference
page
01InjectorsCut fuel to No.
1 injectorEngine:
After having warmed
up/Engine is idling
Idling condition
becomes different
(becomes unsta
Code No.
4113-15
02Cut fuel to No.
2 injectorup/Engine is idling
(Cut the fuel supply to each
injector in turn and check
li d hi h d’ff
(becomes unsta-
ble, resulting in
engine stall).
03Cut fuel to No.
3 injector
j
cylinders which don’t affect
idling.)
04Cut fuel to No.
4 injector
07Fuel pumpFuel pump
operates and
fuel is recircu-
lated.
Engine:
Cranking

Fuel
pump:
Forced
driving
Inspect ac-
cording to
Pinch the
return hose
with fingers
to feel the
pulse of the
fuel being
recirculated.Pulse is felt.Procedure
No. 2513-36
cording to
both the
above condi-
tions.
Listen near
the fuel tank
for the
sound of
fuel pump
operation.Sound of opera-
tion is heard.
09Fuel
pressure
control
valveSolenoid valve
turns from
OFF to ON.Ignition switch: ONSound of opera-
tion can be heard
when solenoid
valve is driven.Procedure
No. 3413-45
12Waste
gate
solenoid
valveSolenoid valve
turns from
OFF to ON.Ignition switch: ONSound of opera-
tion can be heard
when solenoid
valve is driven.Procedure
No. 3513-45
13Fuel pump
relay No.2Turn fuel
pump relay
No.2 from
OFF to ON.
Ignition switch: ON

Listen to pump operation
sound near fuel tank.Sound of opera-
tion can be heard.Procedure
No. 2513-36
17Basic igni-
tion timingSet to ignition
timing adjust-
ment mode
Engine: Idling

Timing light is set5BTDC––

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 – Troubleshooting13-64
Terminal
No.Normal condition Check condition (Engine condition) Check item
20Radiator fan motor
relay (HI)

Radiator fan not operating (coolant temperature:
95C or below)System voltage
Radiator fan at high speed (coolant temperature:
105C or above)0 – 3 V
21Fan motor relay (LOW)
Fan not operating (coolant temperature: 95C or
below)System voltage
Fan at low speed (coolant temperature: 95 – 100C)0 – 3 V
21Radiator fan motor
relay (LOW)

Radiator fan not operating (coolant temperature:
95C or below)System voltage
Radiator fan at low speed (coolant temperature: 95
– 105C)0 – 3 V
22A/C relay
Engine: Idling

A/C switch: OFF to ON (Compressor is being
driven.)System voltage, or 6
V or more instanta-
neously to 0 – 3 V
32A/C condenser fan
motor relay (HI)

A/C condenser fan not operating (A/C switch: ON,
coolant temperature: 105C or below)System voltage
A/C condenser fan at high speed (A/C switch: ON,
coolant temperature: 105C or above)0 – 3 V
33Alternator G terminal
Engine: Warm, idle (radiator fan: OFF)

Headlamp: OFF to ON

Brake lamp: OFF to ON

Rear defogger switch: OFF to ONVoltage rises by 0.2 –
3.5 V.
34A/C condenser fan
motor relay (LOW)

A/C condenser fan not operating (A/C switch: OFF,
coolant temperature: 105C or below)System voltage
A/C condenser fan at low speed (A/C switch: OFF,
coolant temperature: 105C or above)0 – 3 V
36Engine warning lampIgnition switch: OFF → ON0 – 3 V → System
voltage (After several
seconds have
elapsed)
37Power steering fluid
pressure switchEngine: Idling after
warming upWhen steering wheel is
stationarySystem voltage
When steering wheel is
turned0 – 3 V
38Control relayIgnition switch: OFFSystem voltage
Ignition switch: ON0 – 3 V
39Fuel pump relay No.2While engine is idling, suddenly depress the
accelerator pedal.Momentarily rises
slightly from 0 to 3 V.
40Exhaust temperature
warning lampIgnition switch: OFF to ON0 – 3 V to system
voltage (After several
seconds have
elapsed)

MPI – On-vehicle Service13-68
ON-VEHICLE SERVICE
FUEL PUMP RESISTOR CHECK

Standard value: 0.45 – 0.65 Ω
The inspection procedures are the same as for the preceding
year-models.
FUEL PUMP RELAY No.2 CONTINUITY CHECK

Battery voltageTerminal No.
1234
Not supplied
Supplied
ENGINE CONTROL RELAY AND FUEL PUMP
RELAY CONTINUITY CHECK
Battery voltageTerminal No.
1234
Not supplied
Supplied
Equipment side connector for engine
control relay and fuel pump relay
Fuel pump relay
Engine control relay

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 – Troubleshooting 27-5
3. INSPECTION CHART FOR DIAGNOSIS CODE
Diagnosis
code No.Diagnosis itemsRef. page
12Power supply voltage (valve power supply) system (open- or short-circuit)27-6
21FR wheel speed sensor system (open- or short-circuit)27-6
22FL wheel speed sensor system (open- or short-circuit)27-6
23RR wheel speed sensor system (open- or short-circuit)27-6
24RL wheel speed sensor system (open- or short-circuit)27-6
25Wrong-diameter tire27-8
26Faulty wheel speed sensor27-9
31Steer sensor (ST-1, ST-2, ST-N) system (open-circuit)27-10
32Steer sensor (ST-N) system (short-circuit)27-10
33Steer sensor (ST-N) system27-11
34Steer sensor (ST-1, ST-2) system (short-circuit)27-11
41TPS system (open- or short-circuit)27-12
51Longitudinal acceleration sensor system (open- or short-circuit)27-12
52Longitudinal acceleration sensor27-13
56Lateral acceleration sensor system (open- or short-circuit)27-12
61Stop lamp switch system (open-circuit)27-13
65ABS monitor system (open-circuit or defective ABS)27-14
71Proportioning valve system (open- or short-circuit)27-14
72Directional control valve (right) system (open- or short-circuit)27-15
73Directional control valve (left) system (open- or short-circuit)27-16
81AYC relay system (open- or short-circuit)27-17
82Electric pump system27-18
83Electric pump system27-19

REAR AXLE – Troubleshooting 27-14
Code No. 65: ABS monitor systemProbable cause
This code is output when ABS is considered to remain activated (motor relay remains
ON) for a continuous 1-min.-or-more period.
It is output also when there is an open-circuit in the harness between ABS motor
relay and AYC-ECU.
Defective harness or connector

Defective AYC-ECU
OK
Replace AYC-ECU.
NG
Check the harness between ABS
motor relay and AYC-ECU.NG
Repair
OK
Check the trouble symptom.
Is the ABS diagnosis code output?YESRefer to Group 35B – Troubleshooting
NO
Check the following connector:
B-95NG
Repair
Code No. 71: Proportioning valve systemProbable cause
This code is output when the proportioning valve control circuit is open- or short-circuited.
Defective proportioning valve

Defective harness or connector

Defective AYC-ECU
OK
Check and repair the harness between
proportioning valve and body ground.
OK
Check the trouble symptom.
OK
Measure at F-27 proportioning valve
connector.

Disconnect the connector and
measure at the harness side.

Continuity across 2 and body
ground
OK:ConductingNGCheck the following connectors:
F-27, F-30NG
Repair
Measure at F-27 proportioning valve
connector.

Disconnect the connector and
measure at the proportioning valve.

Resistance across 2 – 3
OK:4.7 Ω or lessNGReplace the hydraulic unit.
OK
Replace AYC-ECU.
NG
Check the harness between propor-
tioning valve and AYC-ECU.NG
Repair
OK
Check the trouble symptom.
OK
Check the following connectors:
B-96, B-94, D-06, F-30, F-27NG
Repair