Mitsubishi Space Star. Manual — part 60
13B-27
Code No. P0300 Random cylinder misfire detected
Probable cause
Range of Check
Engine speed is approx. 50 – 4,500 r/min.
When the engine is running except deceleration and sudden acceleration
Set Conditions
The number of misfire exceeds a predetermined number per 200 engine
revolutions.
The number of misfire exceeds a predetermined number per 1,000 engine
revolutions.
Malfunction of the ignition system
Abnormal compression
Malfunction of injector
Abnormal signal from the crank angle sensor
Malfunction of the lambda control system
Malfunction of the engine coolant temperature
sensor
Missing timing belt teeth
Malfunction of the EGR valve
Malfunction of engine-ECU
NG
Check the following items:
Check the ignition coil, spark pugs, spark plug cables.
Check the compression pressure.
Check the timing belt for missing teeth.
Check the EGR system and EGR valve.
OK
MUT-II Data list
21 Engine coolant temperature sensor (Refer to P.13B-65.)
NG
OK
MUT-II Data list
81 Long-term fuel compensation (Refer to P.13B-65.)
NG
Check the abnormal fuel system (Refer to P.13B-25,
INSPECTION PROCEDURE FOR DIAGNOSIS CODE
P0170.)
OK
Check the injector (Refer to P.13B-74*.)
NG
Replace
MUT-II Data list
22 Crankshaft position sensor (Refer to P.13B-65.)
Crankshaft position sensor wave form check
Engine speed: stable
OK: Constant pulse range
NG
Check the crankshaft positron sensor system. (Refer to
P.13B–31, INSPECTION PROCEDURE FOR DIAGNOSIS
CODE P0335.)
OK
Check the following connectors: A-48, A-49, A-54, A-60,
B–28
NG
Repair
OK
Check the harness wire between the engine-ECU and the
injector connector
NG
Repair
MUT-II Data list
82 Short-term fuel compensation (Refer to P.13B-65.)
NG
Check the engine coolant temperature sensor system (Refer
to P.13B-13, INSPECTION PROCEDURE FOR DIAGNOSIS
CODE P0115.)
NG
NOTE:
*:
Refer to the ’99 SPACE STAR Workshop Manual (Pub. No. CMXE99E1)
MPI –
Troubleshooting
13B-28
Code No. P0301 No. 1 cylinder misfire detected
Code No. P0302 No. 2 cylinder misfire detected
Code No. P0303 No. 3 cylinder misfire detected
Code No. P0304 No. 4 cylinder misfire detected
Probable cause
Range of Check
The engine speed is 500 – 4,500 r/min.
While the engine is running except deceleration and sudden acceleration.
Set Conditions
The number of misfires exceeds a predetermined number per 200 engine
revolutions (Misfire has occurred in only one cylinder).
or
The number of misfires exceeds a predetermined number per 1,000 engine
revolutions (Misfire has occurred in only one cylinder).
Malfunction of the ignition system
Abnormal compression
Malfunction of injector
Malfunction of engine-ECU
Replace the engine-ECU.
NG
OK
Check the trouble symptoms.
NG
Check the compression pressure.
(Refer to GROUP 11B – On-vehicle
Service.)
Repair
OK
NG
Replace
Check the spark plugs.
Check the ignition coil (Refer to
GROUP 16 – Ignition System.)
OK
OK
Check the trouble symptoms.
NG
Replace the engine-ECU.
Check the harness wire between
the ignition coil and the
engine-ECU.
OK
NG
Repair
(2) NG
NG
Repair
Check the following connector:
B-28
OK
Check the harness wire between the
ignition coil and the ignition failure
sensor, and between the ignition coil
and the ignition failure sensor.
NG
Replace
Check the ignition failure sensor
(Refer to GROUP 16 – Ignition
System.)
OK
(1) NG
Check the following connector:
A-96
NG
Repair
OK
Measure at ignition coil connectors
A-89, A-91.
Disconnect the connector and
measure at the harness side.
(1) The voltage between terminal 1
and earth
(Ignition switch: ON)
OK: System voltage
(2) The voltage between terminal 3
and earth
(Engine: Cranking)
OK: 0.5 – 4.0 V
(3) The resistance between terminal
2 and earth
OK: 2
Ω
or less
NG
Repair
Check the harness wire between
the ignition coil and the earth, and
repair if necessary.
(3) NG
Check the following connectors:
A-89, A-91
NG
Check the injector (Refer to
P.13B–74*.)
Replace
OK
NG
Check the following connectors:
A-48, A-49, A-54, A–60, B-28
Repair
OK
NG
Check the harness wire between
the injector and the engine-ECU.
Repair
OK
NOTE:
*:
Refer to the ’99 SPACE STAR Workshop Manual (Pub. No. CMXE99E1)
MPI –
Troubleshooting
13B-29
Code No. P0325 Detonation sensor system
Probable cause
Range of Check
Engine: Two seconds after the engine has been started
Set Conditions
Changes in sensor output voltage (detonation sensor peak voltage per 1/2
crankshaft rotation) in 200 consecutive cycles are 0.06 V or less.
Malfunction of the detonation sensor
Open or short circuit in the detonation sensor
circuit or loose connector contact
Malfunction of engine-ECU
NG
Replace the engine-ECU.
Check the trouble symptoms.
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.
NG
Repair
OK
Check the following connector: B-31
NG
Repair
Check the following connector: A-50
NG
Repair
OK
Measure at the detonation sensor connector A-50.
Disconnect the connector and measure at the harness
side.
The resistance between terminal 2 and earth
OK: 2
Ω
or less
NG
Check the harness wire between the detonation sensor and
earth, and repair if necessary.
Code No. P0335 Crank angle sensor system
Probable cause
Range of Check
Engine is cranking
Set Conditions
Sensor output voltage does not change for 2 seconds (no pulse signal
input).
Malfunction of the crank angle sensor.
Open or short circuit in the crank angle sensor
circuit or loose connector contact.
Malfunction of engine-ECU
MPI –
Troubleshooting
13B-30
NG
Replace the engine-ECU.
OK
Check the trouble symptoms.
OK
Check the harness wires between
the crank angle sensor and the
engine-ECU, crank angle sensor
and the engine control relay, and
the crank angle sensor and earth.
Then, repair if necessary.
NG
Check the following connectors:
B-26, B-31
NG
Repair
Check the trouble symptoms.
OK
Replace the crank angle sensor.
NG
Check the crank angle sensor vane
NG
Replace
OK
Use an analyzer to measure the
output waveform at the crank angle
sensor connector A-94.
Use the test harness
(MD998478) to connect the
connector, and measure at the
pick-up harness side.
Engine: Idling
The voltage between terminal 2
and earth
OK: A normal waveform should
be displayed as described
on P.13B-72 (Inspection
Procedure Using an Ana-
lyzer). Its maximum value
should be 4.8 V or more,
and its minimum value
should be 0.6 V or less
with no noise in waveform.
OK
Check the harness wire between
the crank angle sensor and the
engine control relay, and repair if
necessary.
Check the following connector:
B-26
NG
Repair
(3) NG
OK
Check the trouble symptoms.
NG
Replace the engine-ECU.
OK
Check the harness wire between
the crank angle sensor and the
engine-ECU.
NG
Repair
NG
Check the following connector:
B-31
NG
Repair
OK
Check the harness wire between
the crank angle sensor and the
engine-ECU, and repair if necessary.
NG
Repair
OK
Check the following connector:
B-31
(2) NG
Measure at engine-ECU connector
B-31.
Measure the voltage at the
engine-ECU terminal.
Disconnect the connector A-94
Ignition switch: ON
The voltage between terminal 89
and earth.
OK: 4.8 – 5.2 V
(1) NG
Check the harness between the
crank angle sensor and earth, and
repair if necessary.
OK
Measure at the crank angle sensor
connector A-94.
Disconnect the connector and
measure at the harness side.
(1) The resistance between terminal
1 and earth
OK: 2
Ω
or less
(2) The voltage between terminal 2
and earth
(Ignition switch: ON)
OK: 4.8 – 5.2 V
(3) The voltage between terminal 3
and earth
(Ignition switch: ON)
OK: System voltage
NG
Check the following connector:
A-94
NG
Repair
MUT-
II
Data list
22 Crank angle sensor
OK: Refer to P.13B-65, DATA
LIST REFERENCE TABLE.
OK
Intermittent malfunction
(Refer to GROUP 00 – Points to
Note for Intermittent Malfunctions.)
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