Mitsubishi Lancer Evolution 8. Manual — part 173
MPI – TROUBLESHOOTING
13A-78
Checking Procedure 33
MUT-II/III Actuator Test
• No.12: Waste gate solenoid
valve
OK: Operating noise audible,
vibrates
Check connector B-30
B-30 Waste gate solenoid valve
connector measurement
• Undo connector, then take
measurement on solenoid valve
side
• Resistance across 1– 2
OK: 29 to 35Ω (at 20°C)
B-30 Waste gate solenoid valve
connector measurement
• Undo connector, then take
measurement on harness side
• Ignition switch: ON
• Resistance across 1 - earth
OK: Battery voltage
C-50 Engine ECU connector
measurement
• Engine ECU terminal voltage
measurement
• Ignition switch: ON
• Voltage across 41 – earth
OK: Battery voltage
Check connector C-50
Check and repair harness
between waste gate solenoid
valve and engine ECU
• Check to see if output wire is
damaged
Check and repair harness
between waste gate solenoid
valve and engine control relay
• Check to see if power supply
cable is damaged
MUT-II/III Actuator Test
• No.12: Secondary air control
solenoid valve
OK: Operating noise audible,
vibrates
Replace engine ECU
Intermittent malfunction (ref.
Chapter 00 – Intermittent
Malfunctions)
Replace waste gate solenoid
valve
Check connector B-19X
Check and repair harness
between waste gate solenoid
valve and engine control relay
• Check to see if power supply
cable is broken or has a short
circuit
Check connector C-50
Check and repair harness
between waste gate solenoid
valve and engine ECU
• Check to see if output wire is
damaged or has a short circuit
MUT-II/III Actuator Test
• No.12: waste gate solenoid
valve
OK: Operating noise audible,
vibrates
Replace engine ECU
Intermittent malfunction (ref.
Chapter 00 – Intermittent
Malfunctions)
Intermittent malfunction (ref.
Chapter 00 – Intermittent
Malfunctions)
Waste Gate Solenoid Valve System
Probable causes
The waste gate solenoid valve controls pressure that is
introduced to the turbocharger waste gate actuator
• Waste gate solenoid valve malfunction
• Engine ECU malfunction
NG
NG
NG
NG
OK
NG
NG
NG
OK
OK
OK
NG
NG
OK
OK
OK
OK
OK
OK
OK
OK
OK
NG
NG
NG
NG
Repair
Repair
Repair
Repair
Repair
Repair
Repair
MPI – TROUBLESHOOTING
13A-79
Check connector C-50
Check harness between ISC
servo and engine ECU
• Check to see if output wire is
damaged
Check harness between ISC
servo ~ engine control relay.
• Check to see if power supply
cable is damaged.
Confirm fault symptoms
Replace engine ECU
Replace ISC servo
Check connector B-19X
Check and repair harness
between ISC servo and engine
control relay
• Check to see if power supply
cable is broken or has a short
circuit
Check connector C-50
Check harness between ISC
servo and engine ECU
• Check to see if output wire is
damaged or has a short circuit
Confirm fault symptoms
Replace engine ECU
Intermittent malfunction (ref.
Chapter 00 – Intermittent
Malfunctions)
Intermittent malfunction (ref.
Chapter 00 – Intermittent
Malfunctions)
Check connector B-126
B-126 ISC servo connector
measurement
• Undo connector, then take
measurement on ISC servo side
• Resistance across 1– 2
• Resistance across 2– 3
• Resistance across 4– 5
• Resistance across 5– 6
OK: 28 to 33Ω
B-126 ISC servo connector
measurement
• Undo connector, then take
measurement on harness side
• Ignition switch: ON
• Resistance across 2 – earth
• Resistance across 5 – earth
OK: Battery voltage
C-50 Engine ECU connector
measurement
• Engine ECU terminal voltage
measurement
• Voltage across 14 – earth
• Voltage across 15 – earth
• Voltage across 28 – earth
• Voltage across 29 – earth
OK: Immediately after starting up
of warm engine is completed,
the voltage changes noted
below are repeated
<when using circuit tester>
Battery voltage
0 and 6V
Checking Procedure 34
Idle speed control (ISC) servo (servo motor)
Probable causes
The engine ECU controls the volume of air intake during
idling, by opening and closing the servo valve in a by-pass
passage.
• ISC servo malfunction
• ISC servo circuit broken, has a short circuit, or poor
connector contact
• Engine ECU malfunction
OK
NG
NG
NG
OK
NG
NG
NG
OK
OK
OK
NG
NG
NG
OK
OK
OK
OK
OK
OK
OK
NG
NG
NG
Repair
Repair
Repair
Repair
Repair
Repair
Repair
MPI – TROUBLESHOOTING
13A-80
Checking Procedure 35
Check intercooler water spray jet
• Ignition switch: ON
• Intercooler water spray switch
(manual): ON
OK: Intercooler water spray
operates
Check intercooler water spray jet
• Undo engine ECU connector
C-49, then earth 35 terminal
• Ignition switch: ON
OK: Intercooler water spray
operates
Check connector C-220
Check intercooler water spray
relay (ref. Chapter 15 Intake and
Exhaust)
To next page
D-32 Intercooler water spray
switch connector measurement
• Undo connector, then take
measurement on harness side
• Ignition switch: ON
• Voltage across 5 - earth
OK: Battery voltage
Check connector C-22, C-50
Check harness between engine
ECU and intercooler water spray
switch
• Check to see if signal wire is
broken or has short circuit
Replace engine ECU
D-32 Intercooler water spray
switch connector measurement
• Undo connector, then take
measurement on harness side
• Ignition switch: ON
• Voltage across 3, 5 - earth
OK: Battery voltage
Check connector C-22, C-50
Check harness between engine
ECU and intercooler water spray
switch
• Check to see if signal wire is
broken or has a short circuit
Replace engine ECU
Replace intercooler water spray
relay
Check connector D-32
Check intercooler water spray
switch (ref. Chapter 15 Intake and
Exhaust)
Check harness between
intercooler water spray switch
and engine ECU
• Check signal wire for damage
Intermittent malfunction (ref.
Chapter 00 – Intermittent
Malfunctions)
Check connector D-32
Check intercooler water spray
switch (ref. Chapter 15 Intake and
Exhaust)
Check connector C-107
Check harness between
intercooler water spray switch
and engine ECU
• Check earth wire to see if it is
broken or damaged
Check and repair harness
between intercooler water spray
switch and engine ECU
• Check to see if signal wire is
damaged
Intercooler Water Spray Circuit System
Probable causes
• When the intercooler water spray switch (manual) is turned ON, an
intercooler water spray manual ON signal is input to the engine ECU.
When it receives this signal, the engine ECU turns the intercooler
water spray switch ON, runs the intercooler water spray switch motor,
sprays water into the intercooler to cool the intake air, and improves
filling efficiency.
• When the intercooler water spray switch (auto) is turned ON, an
intercooler water spray switch auto ON signal is input to the engine
ECU. When it receives this signal, the engine ECU, during high load
driving conditions, intermittently turns the intercooler water spray relay
ON, runs the intercooler water spray motor, sprays water into the
intercooler to cool the intake air, and improves filling efficiency.
• Intercooler water spray switch malfunction
• Intercooler water spray relay malfunction
• Intercooler water spray motor malfunction
• Intercooler water spray relay circuit broken, short
circuit, or poor connector contact
• Intercooler water spray switch circuit broken, short
circuit, or poor connector contact
• Ignition switch malfunction
• Engine ECU malfunction
OK
OK
OK
OK
OK
OK
OK
OK
OK
NG
NG
NG
NG
NG
NG
NG
OK
OK
OK
NG
OK
OK
NG
NG
NG
OK
NG
NG
NG
NG
OK
OK
Repair
Repair
Repair
Repair
Repair
NG
NG
Repair
Repair
Repair
Repair
Repair
Repair
Repair
MPI – TROUBLESHOOTING
13A-81
From previous page
C-220 Intercooler water spray
relay connector measurement
• Undo connector, then take
measurement on harness side
• Voltage across 3, 1 - earth
(Ignition switch: ON)
OK: Battery voltage
C-49 Engine ECU connector
measurement
• Undo connector, then take
measurement on harness side
• Voltage across 35 - earth
(Ignition switch: ON)
OK: Battery voltage
Check connector C-31
Check harness between
intercooler water spray relay and
intercooler water spray relay
motor
•Check power supply cable to see
if it is broken, has a short circuit,
or is damaged
Check harness between
intercooler water spray relay
motor and earth
• Check to see if earth wire is
broken or damaged
Check connectors C-209,
C-210, C-201, C-208
Check harness between
intercooler water spray relay and
ignition switch
• Check to see if power supply
cable broken or damaged
Check harness between
intercooler water spray relay and
engine ECU
•Check to see if signal wire is
damaged
Check connector A-34
Check intercooler water spray
relay motor (ref. Chapter 15
Intake and Exhaust)
Replace engine ECU
Check connectors C-22, C-49
Check connectors C-209,
C-210, C201, C-208
Check harness between intercooler
water spray relay and ignition switch
• Check to see if power supply cable
is broken or has a short circuit
Check ignition switch
(ref. Chapter 54)
Check connectors C-22, C-208
Check and repair harness
between intercooler water spray
relay and engine ECU
• Check signal wire to see if
broken or if it has a short circuit
OK
NG
OK
NG
NG
NG
OK
OK
NG
NG
NG
NG
NG
NG
NG
NG
NG
NG
OK
OK
OK
OK
OK
OK
OK
OK
OK
OK
OK
Repair
Repair
Repair
Repair
Repair
Repair
Repair
Repair
Repair
Repair
Repair
Repair
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст