Mitsubishi Lancer Evolution 7. Manual — part 183
MPI -
Troubleshooting
13A-31
Code No. P0202 No. 2 injector system
Probable cause
Inspection Range
D
The engine speed is 50 - 1,000 r/min.
D
The throttle position sensor output voltage is 1.15 V or less.
D
MUT-II forced drive (actuator test) is not being carried out.
Evaluation Conditions
D
Surge voltage at injector coil is not detected for 2 seconds.
D
No. 2 injector malfunction
D
No. 2 injector circuit disconnection, short-circuit, or
connector contact defect
D
Engine-ECU malfunction
OK
Intermittent malfunction
(Refer to GROUP 00 - Points to Note
for Intermittent Malfunctions.)
OK
Measure the signal waveform at the
C-126 engine-ECU connector (using
an analyzer).
D
Engine: Idling
D
Voltage between terminal No. 1 and
earth
OK: The waveform shown on
P.13A-119 (Inspection Proce-
dure Using Analyzer) should
be output.
NG
Replace the engine-ECU.
OK
Check the harness between the No. 2
injector and engine-ECU.
D
Check for disconnection,
short-circuit and damage of the
output cable.
NG
Repair
OK
Check the following connector:
C-126
NG
Repair
OK
Check the harness between the resis-
tor (for injector) and engine control
relay.
D
Check for damage of the power
cable.
NG
Repair
OK
Check and repair the harness between
the resistor (for injector) and engine
control relay.
D
Check for disconnection and
short-circuit of the power cable.
NG
OK
Check the harness between the No. 2
injector and resistor (for injector).
D
Check for disconnection and
short-circuit of the power cable.
Repair
NG
OK
Check the resistor. (Refer to
P.13A-138.)
Repair
OK
Check the harness between the No. 2
injector and resistor (for injector).
D
Check for damage of the power
cable.
NG
Repair
OK
Measure at the B-26 No. 2 injector
connector.
D
Disconnect the connector to
measure at the harness side.
D
Ignition switch: ON
D
Voltage between terminal No. 1 and
earth
OK: System voltage
NG
Check the following connectors:
B-11X, B-138, C-108
NG
Repair
OK
Measure at the B-26 No. 2 injector
connector.
D
Disconnect the connector to
measure at the injector side.
D
Resistance between terminal No. 1
and terminal No. 2
OK: 2 - 3 Ω
NG
Replace the No. 2 injector.
NG
Check the following connector:
B-26
NG
Repair
MUT-II Actuator test
D
No. 02: No. 2 injector
OK: The idling state changes.
OK
Intermittent malfunction
(Refer to GROUP 00 - Points to Note
for Intermittent Malfunctions.)
MPI -
Troubleshooting
13A-32
Code No. P0203 No. 3 injector system
Probable cause
Inspection Range
D
The engine speed is 50 - 1,000 r/min.
D
The throttle position sensor output voltage is 1.15 V or less.
D
MUT-II forced drive (actuator test) is not being carried out.
Evaluation Conditions
D
Surge voltage at injector coil is not detected for 2 seconds.
D
No. 3 injector malfunction
D
No. 3 injector circuit disconnection, short-circuit, or
connector contact defect
D
Engine-ECU malfunction
OK
Intermittent malfunction
(Refer to GROUP 00 - Points to Note
for Intermittent Malfunctions.)
OK
Measure the signal waveform at the
C-126 engine-ECU connector (using
an analyzer).
D
Engine: Idling
D
Voltage between terminal No. 1 and
earth
OK: The waveform shown on
P.13A-119 (Inspection Proce-
dure Using Analyzer) should
be output.
NG
Replace the engine-ECU.
OK
Check the harness between the No. 3
injector and engine-ECU.
D
Check for disconnection,
short-circuit and damage of the
output cable.
NG
Repair
OK
Check the following connector:
C-126
NG
Repair
OK
Check the harness between the resis-
tor (for injector) and engine control
relay.
D
Check for damage of the power
cable.
NG
Repair
OK
Check and repair the harness between
the resistor (for injector) and engine
control relay.
D
Check for disconnection and
short-circuit of the power cable.
NG
OK
Check the harness between the No. 3
injector and resistor (for injector).
D
Check for disconnection and
short-circuit of the power cable.
Repair
NG
OK
Check the resistor. (Refer to
P.13A-138.)
Repair
OK
Check the harness between the No. 3
injector and resistor (for injector).
D
Check for damage of the power
cable.
NG
Repair
OK
Measure at the B-25 No. 3 injector
connector.
D
Disconnect the connector to
measure at the harness side.
D
Ignition switch: ON
D
Voltage between terminal No. 1 and
earth
OK: System voltage
NG
Check the following connectors:
B-11X, B-138, C-108
NG
Repair
OK
Measure at the B-25 No. 3 injector
connector.
D
Disconnect the connector to
measure at the injector side.
D
Resistance between terminal No. 1
and terminal No. 2
OK: 2 - 3 Ω
NG
Replace the No. 3 injector.
NG
Check the following connector:
B-25
NG
Repair
MUT-II Actuator test
D
No. 03: No. 3 injector
OK: The idling state changes.
OK
Intermittent malfunction
(Refer to GROUP 00 - Points to Note
for Intermittent Malfunctions.)
MPI -
Troubleshooting
13A-33
Code No. P0204 No. 4 injector system
Probable cause
Inspection Range
D
The engine speed is 50 - 1,000 r/min.
D
The throttle position sensor output voltage is 1.15 V or less.
D
MUT-II forced drive (actuator test) is not being carried out.
Evaluation Conditions
D
Surge voltage at injector coil is not detected for 2 seconds.
D
No. 4 injector malfunction
D
No. 4 injector circuit disconnection, short-circuit, or
connector contact defect
D
Engine-ECU malfunction
OK
Intermittent malfunction
(Refer to GROUP 00 - Points to Note
for Intermittent Malfunctions.)
OK
Measure the signal waveform at the
C-126 engine-ECU connector (using
an analyzer).
D
Engine: Idling
D
Voltage between terminal No. 1 and
earth
OK: The waveform shown on
P.13A-119 (Inspection Proce-
dure Using Analyzer) should
be output.
NG
Replace the engine-ECU.
OK
Check the harness between the No. 4
injector and engine-ECU.
D
Check for disconnection,
short-circuit and damage of the
output cable.
NG
Repair
OK
Check the following connector:
C-126
NG
Repair
OK
Check the harness between the resis-
tor (for injector) and engine control
relay.
D
Check for damage of the power
cable.
NG
Repair
OK
Check and repair the harness between
the resistor (for injector) and engine
control relay.
D
Check for disconnection and
short-circuit of the power cable.
NG
OK
Check the harness between the No. 4
injector and resistor (for injector).
D
Check for disconnection and
short-circuit of the power cable.
Repair
NG
OK
Check the resistor. (Refer to
P.13A-138.)
Repair
OK
Check the harness between the No. 4
injector and resistor (for injector).
D
Check for damage of the power
cable.
NG
Repair
OK
Measure at the B-24 No. 4 injector
connector.
D
Disconnect the connector to
measure at the harness side.
D
Ignition switch: ON
D
Voltage between terminal No. 1 and
earth
OK: System voltage
NG
Check the following connectors:
B-11X, B-138, C-108
NG
Repair
OK
Measure at the B-24 No. 4 injector
connector.
D
Disconnect the connector to
measure at the injector side.
D
Resistance between terminal No. 1
and terminal No. 2
OK: 2 - 3 Ω
NG
Replace the No. 4 injector.
NG
Check the following connector:
B-24
NG
Repair
MUT-II Actuator test
D
No. 04: No. 4 injector
OK: The idling state changes.
OK
Intermittent malfunction
(Refer to GROUP 00 - Points to Note
for Intermittent Malfunctions.)
MPI -
Troubleshooting
13A-34
Code No. P0325 Detonation sensor system
Probable cause
Inspection Range
D
Ignition switch: ON
D
Excluding for 2 seconds after ignition switch is set to “ON” position or 2 seconds
after engine start is completed.
D
The engine speed is approximately 2,000 r/min or more.
D
The volumetric efficiency is 30% or more.
Set Conditions
D
Changes in sensor output voltage (detonation sensor peak voltage per 1/2
crankshaft rotation) in 200 consecutive cycles are 0.06 V or less.
D
Malfunction of the detonation sensor
D
Detonation sensor circuit disconnection, short-circuit,
or connector contact defect
D
Malfunction of engine-ECU
OK
Check the trouble symptoms.
NG
Replace the engine-ECU.
NG
Replace the detonation sensor.
OK
Check the trouble symptoms.
OK
Intermittent malfunction (Refer to GROUP 00 - Points to Note for
Intermittent Malfunctions.)
OK
Check the harness wire between the detonation sensor and the
engine-ECU.
D
Check for open circuit, short circuit, and damage of the output
wire.
NG
Repair
OK
Check the following connector: C-71
NG
Repair
OK
Measure at the B-122 detonation sensor connector
D
Disconnect the connector and measure at the harness side.
D
The resistance between terminal No.2 and earth
OK: 2 Ω or less
NG
Check the harness wire between the detonation sensor and earth,
and repair if necessary.
D
Check for disconnection and damage of the earth wire.
Check the following connector: B-122
NG
Repair
End
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