Mitsubishi Electric Lancer Evolution-VII Workshop Manual page 1170

Code No. P0204 No. 4 injector system
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.
MUT-II Actuator test
D No. 04: No. 4 injector
OK: The idling state changes.
NG
Check the following connector:
B-24
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
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
OK
Check the harness between the No. 4
injector and resistor (for injector).
D Check for damage of the power
cable.
OK
Check the harness between the resis-
tor (for injector) and engine control
relay.
D Check for damage of the power
cable.
OK
Check the following connector:
C-126
OK
Check the harness between the No. 4
injector and engine-ECU.
D Check for disconnection,
short-circuit and damage of the
output cable.
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.
MPI -
Troubleshooting
OK
Intermittent malfunction
(Refer to GROUP 00 - Points to Note
for Intermittent Malfunctions.)
NG
Repair
NG
Replace the No. 4 injector.
NG
NG
Repair
NG
Repair
NG
Repair
NG
Repair
NG
Replace the engine-ECU.
OK
Intermittent malfunction
(Refer to GROUP 00 - Points to Note
for Intermittent Malfunctions.)
Probable cause
D No. 4 injector malfunction
D No. 4 injector circuit disconnection, short-circuit, or
connector contact defect
D Engine-ECU malfunction
Check the following connectors:
B-11X, B-138, C-108
OK
Check the resistor. (Refer to
P.13A-138.)
OK
Check the harness between the No. 4
injector and resistor (for injector).
D Check for disconnection and
short-circuit of the power cable.
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.
13A-33
NG
Repair
NG
Repair
NG
Repair