Mitsubishi FUEL Manual page 28

13A-28
Code No. P0201 No. 1 injector system
Code No. P0202 No. 2 injector system
Code No. P0203 No. 3 injector system
Code No. P0204 No. 4 injector system
Range of Check
D Engine speed is approx. 50 - 1,000 r/min
D The throttle position sensor output voltage is 1.15 V or less.
D Actuator test by MUT-II is not carried out.
Set Conditions
D Surge voltage of injector coil is not detected for 4 seconds.
MUT-II Actuator Test
01 No. 1 injector
02 No. 2 injector
03 No. 3 injector
04 No. 4 injector
OK: The idling condition should change
Check the following connectors:
B-02, B-03, B-05, B-36
Check the injector. (Refer to P.13A-93*.)
Measure at the injector connector B-02, B-03, B-05, B-36.
D Disconnect the connector, and measure at the harness side.
D Voltage between 1 and earth (Ignition switch: ON)
OK: System voltage
Check the following connector: C-34 <M/T>, C-177 <A/T>
Measure at the engine-ECU connector C-34 <M/T> or engine-A/T-
ECU connector C-177<A/T>.
D Disconnect the connector, and measure at the harness side.
D Voltage between 1, 2, 14, 15 and earth (Ignition switch: ON)
<M/T>
D Voltage between 1, 2, 9, 24 andearth (Ignitionswitch: ON)<A/T>
OK: System voltage
Check trouble symptoms.
Use an analyzer to measure the signal waveform at injector
connector B-02, B-03, B-05, B-36.
D Use a test harness (MB991348) to connect the connector, and
measure at the pick-up harness side.
D Engine: Idling
D The voltage between terminal 2 and earth
OK: A normal waveform should be displayed as described
on P.13A-88 (INSPECTION PROCEDURE USING
AN ANALYZER).
Replace the engine-ECU <M/T> or engine-A/T-ECU <A/T>.
NOTE:
*: Refer to the '97 GALANT Workshop Manual (Pub. No. PWDE9611)
MPI <4G6> -
NG
OK
OK
OK
OK
OK
NG
NG
Troubleshooting
Probable cause
D Malfunction of the injector
D Improper connector contact, open circuit or short-cir-
cuited harness wire of the injector circuit
D Malfunction of engine-ECU <M/T>
D Malfunction of engine-A/T-ECU <A/T>
OK
Intermittent malfunction
(Refer to GROUP 00 - Points to Note for Intermittent Malfunctions.)
NG
Repair
NG
Replace
NG
Check the harness wire between the engine control relay and the
injector connector, and repair if necessary.
NG
Repair
NG
Check the harness wire between the engine-ECU <M/T> or
engine-A/T-ECU <A/T> and the injector connector, and repair if
necessary.
OK
Intermittent malfunction (Refer to GROUP 00 - Points to Note for
Intermittent Malfunctions.)