Mitsubishi Space Star. Manual — part 31
GDI –
Troubleshooting
13A-51
OK
Check the trouble symptoms.
Intermittent malfunction
(Refer to GROUP 00 – Points to Note for Intermittent Malfunctions.)
OK
Check the harness wire between the
camshaft position sensor connector
and earth, and repair if necessary.
(3) NG
OK
Check the harness wire between
the camshaft position sensor
connector and the engine-ECU
<M/T> or engine-A/T-ECU <A/T>,
and repair if necessary.
NG
Repair
NG
NG
Repair
NG
Repair
(2) NG
Measure at engine-ECU connector
B-86 <M/T> or engine-A/T-ECU
connector B-85 <A/T>.
Measure the voltage at the
engine-ECU terminal <M/T> or
engine-A/T-ECU terminal <A/T>.
Disconnect connector A-81.
Ignition switch: ON
The voltage between terminal 50
<M/T>, 56<A/T> and earth
OK: 4.8 – 5.2 V
OK
Check the following connectors:
B-86 <M/T>, B-85 <A/T>
OK
Check the harness wire between
the camshaft position sensor
connector and the engine control
relay, and repair if necessary.
OK
Measure at camshaft position
sensor connector A-81.
Disconnect the connector and
measure at the harness side.
(1) The voltage between terminal 3
and earth
(Ignition switch: ON)
OK: System voltage
(2) The voltage between terminal 2
and earth
(Ignition switch: ON)
OK: 4.8 – 5.2 V
(3) The resistance between terminal
1 and earth
OK: 2
Ω
or less
(1) NG
Check the following connector:
B-26
NG
Repair
Replace the camshaft position
sensor.
Check the trouble symptoms.
OK
NG
Repair
OK
Check the harness wires between the camshaft position sensor connector and the
engine-ECU <M/T> or engine-A/T-ECU <A/T>, the camshaft position sensor connector
and the engine control relay, and the camshaft position sensor connector and earth.
Then, repair if necessary.
NG
Replace the engine-ECU <M/T> or
engine-A/T-ECU <A/T>.
OK
Check the harness wire between
the intermediate connector and the
engine-ECU <M/T> or
engine-A/T-ECU <A/T>.
NG
Repair
OK
Use an analyzer to measure the
output waveform at camshaft
position sensor connector A-81.
Use test harness (MB991709) to
connect the connector, and
measure at the pick-up harness.
Engine: Idling
The voltage between terminal 2
and earth
OK: A normal waveform should
be displayed as described
on P.13A-118 (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
.
NG
NG
Check the camshaft position sensing
cylinder.
NG
OK
Check the trouble symptoms.
NG
Replace the engine-ECU <M/T> or
engine-A/T-ECU <A/T>.
Replace
Check the following connector:
A-81
Check the following connectors:
B-86 <M/T>, B-85 <A/T>
Check the following connectors:
B-86 <M/T>, B-85 <A/T>, B-26
GDI –
Troubleshooting
13A-52
Code No. P0403 EGR valve system
Probable cause
Range of Check
Ignition switch: OFF to ON
EGR valve is in operation after the engine starting process is complete.
Set Conditions
Off–surge voltage is not generated from the motor coil while the EGR valve
control motor is running.
Malfunction of the EGR valve
Open or short circuit in the EGR valve circuit or
loose connector contact
Malfunction of engine-ECU <M/T>
Malfunction of engine-A/T-ECU <A/T>
GDI –
Troubleshooting
13A-53
OK
Check the following connector:
A-62
NG
Repair
Measure at EGR valve connector
A-62.
Disconnect the connector, and
measure at the EGR valve side.
The resistance between terminals
1 and 2
The resistance between terminals
2 and 3
The resistance between terminals
4 and 5
The resistance between terminals
5 and 6
OK: 10 – 20
Ω
NG
Replace
OK
Check the harness wire between the
EGR valve and the engine control
relay, and repair if necessary.
NG
Replace the engine-ECU <M/T> or
engine-A/T-ECU <A/T>.
OK
NG
Check the following connector: B-26
NG
Repair
OK
Measure at engine-ECU connector
B-84<M/T> or engine-A/T-ECU
connector B-85 <A/T>.
Measure the voltage at the
engine-ECU terminal <M/T> or
engine-A/T-ECU terminal <A/T>.
The voltage between terminal 5
<M/T>, 51 <A/T> and earth.
The voltage between terminal 6
<M/T>, 53 <A/T> and earth.
The voltage between terminal 32
<M/T>, 60 <A/T> and earth.
The voltage between terminal 34
<M/T>, 62 <A/T> and earth.
OK: The voltage changes as follows
for three seconds when the
ignition switch is turned ON.
(When using a circuit tester)
5 V and 8 V alternates
(When using an analyzer)
1 V or less and system voltage
alternates
NG
Check the following connectors:
B-84 <M/T>, B-85 <A/T>
NG
Repair
OK
Check the harness wire between the
EGR valve and the engine-ECU <M/T>
or engine-A/T-ECU <A/T>.
OK
Check the following connectors:
B-84 <M/T>, B-85 <A/T>
NG
Repair
OK
Check the harness wires between
the EGR valve and the engine
control relay, and between the EGR
valve and the engine-ECU <M/T> or
engine-A/T-ECU <A/T>.
NG
Repair
OK
Check the trouble symptoms.
OK
Intermittent malfunction
(Refer to GROUP 00 – Points to
Note for Intermittent Malfunctions.)
NG
Repair
OK
Replace the engine-ECU <M/T> or
engine-A/T-ECU <A/T>.
Measure at EGR valve connector
A-62.
Disconnect the connector and
measure at the harness side.
Ignition switch: ON
The voltage between terminal 2
and earth
The voltage between terminal 5
and earth
OK: System voltage
GDI –
Troubleshooting
13A-54
Code No. P0420 Catalyst malfunction
Probable cause
Range of Check
The engine speed is 3,000 r/min or less.
During driving
During air/fuel ratio feedback control
Set Conditions
The ratio between the oxygen sensor (rear) and the oxygen sensor (front)
output frequencies reaches 0.8 per 12 seconds on average.
Malfunction of catalyst
Malfunction of the oxygen sensor (front)
Malfunction of the oxygen sensor (rear)
Malfunction of engine-ECU <M/T>
Malfunction of engine-A/T-ECU <A/T>
Check the trouble symptoms.
NG
Replace the catalytic converter.
Check the trouble symptoms.
OK
Replace the oxygen sensor (rear).
OK
MUT-
II
Data list
11 Oxygen sensor (front)
Transmission: 2nd gear <M/T>, L range <A/T>
OK: Changeover between 0 – 400 mV and 600 – 1,000
mV occur 15 times in 10 seconds.
Replace the oxygen sensor (front).
NG
MUT-
II
Data list
11 Oxygen sensor (front)
OK: 600 – 1,000 mV when racing suddenly
OK
NG
Check the oxygen sensor (front) system <sensor 1>
(Refer to P.13A-26, INSPECTION PROCEDURE FOR
DIAGNOSTIC TROUBLE CODE P0130.)
OK
MUT-
II
Data list
59 Oxygen sensor (rear)
Transmission: 2nd gear <M/T>, L range <A/T>
Drive with wide open throttle
OK: 600 – 1,000 mV
NG
Check the oxygen sensor (rear) system <sensor 2>
(Refer to P.13A-29, INSPECTION PROCEDURE FOR
DIAGNOSTIC TROUBLE CODE P0136.)
Check the exhaust manifold. (Are there any cracks?)
NG
NG
Replace the engine-ECU <M/T> or engine-A/T-ECU <A/T>.
Repair
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