fuel pump MITSUBISHI LANCER EVOLUTION VI 1999 User Guide

MPI – Troubleshooting13-53
INSPECTION PROCEDURE 45
Check the engine-ECU power supply and earth circuit.
Measure at the engine-ECU connectors, B-59, B-60, B-62.

Disconnect the connector and measure at the harness side
1. Voltage between 82 and earth (Ignition switch: ON)
OK:System voltage
2. Voltage between 38 and earth
OK:System voltage
3. Voltage between 12, 25 and earth (Ignition switch: ON)
OK:System voltage (when the terminal 38 is earthed)
4. Continuity between 13, 26 and earth
OK:Continuity
5. Voltage between 80 and earth
OK:System voltage1. NGCheck the following
connectors: B-65, B-76NG
Repair
OK
Check trouble symptom.
NG
Check the harness wire
between engine-ECU and
ignition switch connector.NG
Repair
OK
Check the ignition switch. (Refer to GROUP 54.)
2, 3. NG
4. NG
Check the harness wire between engine-ECU and earth, and repair
if necessary.
5. NG
OK
Check the following
connectors:
B-59, B-60, B-62NG
Repair
OK
Check trouble symptom.
NG
Replace the engine-ECU.
Check the following connectors:
B-65, B-49, B-75, B-73NG
Repair
OK
Check trouble symptom.
NG
Check the harness wire between engine-ECU and battery, and
repair if necessary.
Check the harness wire between engine-ECU and control relay
connector, and repair if necessary.
INSPECTION PROCEDURE 46 <EVOLUTION-IV, EVOLUTION-V>
Check fuel pump circuit.
Measure at the fuel pump connector D-18.

Disconnect the connector and measure at the harness side.

Continuity between 1 and earth
OK:ContinuityNGCheck the following connector:
D-04NG
Repair
OK
Check trouble symptom.
NG
Check the harness wire between fuel pump and earth, and repair
if necessary.
OK
Check the following connectors: D-04, B-64NG
Repair OKCheck trouble symptom.
NG
Check the harness wire between terminal for fuel pump drive and
fuel pump connector.NG
Repair
OK
Replace the fuel pump.

MPI – Troubleshooting13-54
INSPECTION PROCEDURE 46 <EVOLUTION-VI>
Check fuel pump circuit.
Measure at the fuel pump relay connector D-18.

Disconnect the connector and measure at the harness side.

Continuity between 1 and earth
OK:ContinuityNGCheck the following connector:
D-04NG
Repair
OK
Check trouble symptom.
NG
Check the harness wire between fuel pump and earth, and repair
if necessary.
OK
Check the following connectors: A-123, B-64, D-18, D-32NG
Repair OKCheck trouble symptom.
NG
Check the harness wire between fuel pump and fuel pump relay
No.2 connector.NG
Repair
OK
Replace the fuel pump.
INSPECTION PROCEDURE 47
Check the fuel pump drive control circuit.
NG
Check the harness wire between the fuel pump relay and engine-
ECU connector.
OK
Check trouble symptom.
OK
Check trouble symptom.
NG
Check the harness wire
between fuel pump relay
and ignition switch con-
nector.NG
Repair
OK
Check the ignition switch. (Refer to GROUP 54.)OK
Check trouble symptom.
NG
Replace the engine-ECU.
NG
Repair
OK
Check the following connector: B-59
OK
Measure at the engine-ECU connector B-59.

Disconnect the connector and measure at the harness side.

Voltage between 8 and earth (Ignition switch: ON)
OK:System voltageNG
Measure at the fuel pump relay connector B-28.

Disconnect the connector and measure at the harness side.

Voltage between 3, 4 and earth (Ignition switch: ON)
OK:System voltageNGCheck the following
connectors: B-65, B-76NG
Repair
Check the following
connector: B-28NG
Repair

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)
<EVOLUTION-IV, V>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)
<EVOLUTION VI>
Radiator fan not operating (coolant temperature:
95C or below)System voltage
<EVOLUTION-VI>Radiator fan at high speed (coolant temperature:
105C or above)0 – 3 V
21Fan motor relay (LOW)
<EVOLUTION-IV, V>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)
<EVOLUTION VI>
Radiator fan not operating (coolant temperature:
95C or below)System voltage
<EVOLUTION-VI>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)
<EVOLUTION VI>
A/C condenser fan not operating (A/C switch: ON,
coolant temperature: 105C or below)System voltage
<EVOLUTION-VI>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)
<EVOLUTION VI>
A/C condenser fan not operating (A/C switch: OFF,
coolant temperature: 105C or below)System voltage
<EVOLUTION-VI>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
<EVOLUTION-VI>
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
<EVOLUTION-VI>
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

FUEL SUPPLY – General / Fuel Tank13-69
FUEL SUPPLY
GENERAL
OUTLINE OF CHANGE
The service procedures have been revised as shown below because of change in the fuel pump & gauge
assembly and the fuel gauge unit. <EVOLUTION-VI>
FUEL TANK <EVOLUTION-VI>
REMOVAL AND INSTALLATION
4
32 1
65
7
11
Removal steps
1. Fuel hose
2. Fuel pump & gauge assembly
3. Packing
A4. High-pressure fuel hose5. Fuel pipe assembly
6. Fuel gauge unit
7. Packing
NOTE
The service procedures other than those mentioned above
remain unchanged.
INSTALLATION SERVICE POINT
AHIGH-PRESSURE FUEL HOSE INSTALLATION
Caution
After connecting the quick-release joint of the
high-pressure fuel hose, pull it gently in the direction
of removal to check that the hose is firmly connected
with a play of about 3 mm.

– Engine Compartment WIRING HARNESS
CONFIGURATION DIAGRAMSC-7
A-94 (4-GR) Radiator fan motor
A-96 (2-GR) Knock sensor
A-97 (3-B) Camshaft position sensor
A-99 (2-B) Condenser fan motor
A-101 (1) Power steering oil pressure switch
A-102 (1) Spare connector for fog lamp
A-103 (2-B) Fog lamp (RH)
A-104 (2) Position lamp (RH)
A-105 (3-B) Headlamp (RH)
A-106 (1-B) A/C compressor assembly
A-107 (2-BR) Front turn signal lamp (RH)
A-110 (3-GR) Ignition coil 1
A-111 (3-GR) Ignition coil 2A-112X (4) Radiator fan relay (HI)
A-113X (4) Condenser fan relay (LO)
A-114X (4) Condenser fan relay (HI)
A-116X (4) A/C compressor relay
A-117 (2-GR) Side turn signal lamp (RH)
A-123 (5-B) Fuel pump relay No.2
A-124 (2-B) Fuel pump resistor
A-125 (6-B) Resistor (for injector)
A-126 (5-B) AYC relay
A-127 (2-B) Secondary air control solenoid valve
A-128 (2-GR) Condenser fan motor
A-129 (2-B) Water spray motor
A-131 (1-B) Noise condenser

– Dash Panel WIRING HARNESS
CONFIGURATION DIAGRAMS
Interior relay box
C-9
B-21 (2) Stop lamp switch
B-22 (16-B) Diagnosis connector
B-24 (26-Y) ABS-ECU
B-25 (22-Y) ABS-ECU
B-26 (2-B) Diode (for ABS circuit)
B-27 (4) Engine control relay
B-28 (4) Fuel pump relay
B-30 (14) Radio or spare connector for radio
B-31 (1) Glass antenna amplifier
B-32 (19-B) J/C (5)
B-33 (2) Blower motor <vehicles with fully auto-
matic air conditioner>B-34 (4) Blower high speed relay <vehicles with
fully automatic air conditioner>
B-35 (22) Body harness and front door harness
(passenger’s side) combination
B-36 (2) Inside and outside air change-over
damper motor <vehicles with fully
automatic air conditioner>
B-37 (4) Power transistor <vehicles with fully
automatic air conditioner> or resistor
<vehicles with heater or manual air
conditioner>

SINGLE PART INSTALLATION POSITION – Relay
B
Fuel pump relay No.2
AYC relay
C
Radiator fan
motor relay (LO)
C-16
SINGLE PART INSTALLATION POSITION
RELAY
NameSymbolNameSymbol
AYC relayBFuel pump relay No.2B
Condenser fan motor relay (HI)ARadiator fan motor relay (HI)A
Condenser fan motor relay (LO)ARadiator fan motor relay (LO)C
A
Condenser fan motor
relay (LO)Condenser fan motor
relay (HI)
Radiator fan motor
relay (HI)