MPI <4G1> -
Troubleshooting
13A-26
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
Probable cause
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 2 seconds.
D
Malfunction of the injector
D
Improper connector contact, open circuit or
short-circuited harness wire of the injector circuit
D
Malfunction of the engine-ECU
Replace the engine-ECU.
NG
OK
Intermittent malfunction
(Refer to GROUP 00 - Points to Note for Intermittent Malfunctions.)
NG
Use an analyzer to measure the signal waveform at injector
connectors A-74, A-75, A-76, A-80.
D
Connect the connector using test harness (MB991348), and
measure at pick-up harness.
D
Engine: Idling
D
The voltage between terminal 2 and earth
OK:
A normal waveform should be displayed as described
on P.13A-69* (INSPECTION PROCEDURE USING AN
ANALYZER).
OK
Check the trouble symptoms.
NG
Measure at the engine-ECU connector B-37.
D
Disconnect the connector, and measure at the harness side.
D
Voltage between 1, 2, 14, 15 and earth (Ignition switch: ON)
OK:
System voltage
Check the harness wire between the engine-ECU and the injector
connector, and repair if necessary.
OK
NG
Repair
NG
NG
OK
Check the following connector:
B-37
Replace
NG
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
OK
Intermittent malfunction
(Refer to GROUP 00 - Points to Note for Intermittent Malfunctions.)
NG
Measure at the injector connectors A-74, A-75, A-76, A-80.
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 connectors:
A-74, A-75, A-76, A-80
NG
OK
Check the injector. (Refer to P.13A-86*.)
NG
Check the harness wire between the engine control relay and the
injector connector, and repair if necessary.
OK
Repair
NOTE:
*: Refer to the ’96 COLT/LANCER Workshop Manual (Pub. No. PWME9511).