Mitsubishi Space Star. Manual — part 22
GDI –
Troubleshooting
13A-15
OK
Check the harness between the air
flow sensor and the engine-ECU
<M/T> or engine-A/T-ECU <A/T>.
NG
Repair
OK
Check the harnesses between the
air flow sensor and the engine-ECU
<M/T> or engine-A/T-ECU <A/T>
and between the air flow sensor
and the engine control relay, and
repair if necessary.
OK
Measure at air flow sensor
connector A-73.
Use test harness (MB991709) to
connect the connector, and
measure at the pick-up harness.
Selector lever position: P
Voltage between terminal 7 and
earth
OK: Engine: Idling
0 – 1 V
Engine speed: 3,000 r/min
6 – 9 V
NG
Check the following connectors:
B-87 <M/T>, B-84 <A/T>
NG
Repair
OK
Check the trouble symptoms.
NG
Replace the engine-ECU <M/T> or
engine-A/T-ECU <A/T>.
Check the trouble symptoms.
NG
Check the following connectors:
B-86 <M/T>, B-85 <A/T>
NG
Repair
OK
Measure the output wave form at
air flow sensor connector A-73 (by
using an analyzer).
Use test harness (MB991709) to
connect the connector, and
measure at the pick-up harness.
Engine: Idling
Voltage between terminal 3 and
earth
OK: Waveforms should be dis-
played on P.13A-118 (In-
spection Procedure Using
an Analyzer) and noise
should not be displayed in
the waveform.
NG
Replace the air flow sensor.
OK
Check the trouble symptoms.
NG
Replace the engine-ECU <M/T> or
engine-A/T-ECU <A/T>.
OK
OK
Replace the air flow sensor.
OK
Measure at air flow sensor
connector A-73.
Use test harness (MB991709) to
connect the connector, and
measure at the pick-up harness.
Ignition switch: ON
Voltage between terminal 7 and
earth
OK: 7 – 8 V
NG
Check the following connectors:
B-87 <M/T>, B-84 <A/T>
NG
Repair
OK
Check the harness between the air
flow sensor and the engine-ECU
<M/T> or engine-A/T-ECU <A/T>.
NG
Repair
From the previous page
GDI –
Troubleshooting
13A-16
Code No. P0105 Barometric pressure sensor system
Probable cause
Range of Check
Two seconds have passed since the ignition switch is turned ON or the
engine starting process is completed.
Battery voltage: 8 V or more
Set Conditions
The sensor output voltage is 4.5 V or more for four seconds (equivalent to
114 kPa of barometric pressure)
or
The sensor output voltage is 0.2 V or less (equivalent to 53 kPa of
barometric pressure)
Malfunction of barometric pressure sensor
Open or short circuit in barometric pressure
sensor circuit or loose connector contact
Malfunction of engine-ECU <M/T>
Malfunction of engine-A/T-ECU <A/T>
(2) NG
Check the following connectors:
B-87 <M/T>, B-86<A/T>
NG
Repair
OK
Check the harness between the air
flow sensor and the engine-ECU
<M/T> or engine-A/T-ECU <A/T>,
and repair if necessary.
MUT-
II
Data list
25 Barometric pressure sensor
(Refer to P.13A-99, DATA LIST
REFERENCE TABLE.)
OK
Transient malfunction
(Refer to GROUP 00 – Points to
Note for Intermittent Malfunctions.)
NG
NG
Repair
OK
Measure at air flow sensor
connector A-73.
Disconnect the connector and
measure at the harness side.
(1) Voltage between terminal 1 and
earth (Ignition switch: ON)
OK: 4.8 – 5.2 V
(2) Resistance between terminal 5
and earth
OK: 2
Ω
or less
(1) NG
Measure at engine-ECU connector
B-86 <M/T> or engine-A/T-ECU
connector B-86 <A/T>.
Measure the voltage at the
engine-ECU terminal <M/T> or
engine-A/T-ECU terminal <A/T>.
Ignition switch: ON
Voltage between terminal 41
<M/T>, 87 <A/T> and earth
OK: 4.8 – 5.2 V
OK
Check the following connector:
B-86
NG
Repair
NG
Check the following connector:
B-86
NG
Repair
OK
Check the harness between the air
flow sensor and the engine-ECU
<M/T> or engine-A/T-ECU <A/T>.
NG
Repair
OK
Check the trouble symptoms.
NG
Replace the engine-ECU <M/T> or
engine-A/T-ECU <A/T>.
OK
To the next page
OK
Check the harness between the air
flow sensor and the engine-ECU
<M/T> or engine-A/T-ECU <A/T>.
NG
Repair
OK
Check the trouble symptoms.
NG
Replace the engine-ECU <M/T> or
engine-A/T-ECU <A/T>.
Check the following connector:
A-73
GDI –
Troubleshooting
13A-17
OK
Check the harness between the air
flow sensor and the engine-ECU
<M/T> or engine-A/T-ECU <A/T>,
and repair if necessary.
From the previous page
OK
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>.
Ignition switch: ON
Voltage between terminal 51
<M/T>, 65 <A/T> and earth
OK: Altitude 0 m: 3.7 – 4.3 V
Altitude 1,200 m:
3.2 – 3.8 V
NG
Check the following connectors:
B-86 <M/T>, B–85<A/T>
NG
Repair
OK
Check the trouble symptoms.
OK
Check the following connectors:
B-86 <M/T>, B-87<A/T>
NG
Repair
NG
Replace the engine-ECU <M/T> or
engine-A/T-ECU <A/T>.
OK
Measure at air flow sensor
connector A-73.
Connect connector terminals No.
1, No. 2 and No. 5 only by
using test harness (MB991709),
and measure at the pick-up
harness.
Ignition switch: ON
(1) Voltage between terminal 1 and
earth
OK: 4.8 – 5.2 V
(2) Voltage between terminal 2 and
earth
OK: Altitude 0 m: 3.7 – 4.3 V
Altitude 1,200 m:
3.2 – 3.8 V
(3) Voltage between terminal 5 and
earth
OK: 0.5 V or less
(1) NG
Check the following connector:
B-86
NG
Repair
OK
Check the harness between the air
flow sensor and the engine-ECU
<M/T> or engine-A/T-ECU <A/T>,
and repair if necessary.
(3) NG
(2) NG
Replace the air flow sensor.
NG
Check the following connectors:
B-86 <M/T>, B-85 <A/T>
NG
Repair
OK
Check the harness between the air
flow sensor and the engine-ECU
<M/T> or engine-A/T-ECU <A/T>,
and repair if necessary.
Check the trouble symptoms.
Check the following connectors:
B-87 <M/T>, B-86 <A/T>
NG
Repair
OK
Check the harness between the air
flow sensor and the engine-ECU
<M/T> or engine-A/T-ECU <A/T>,
and repair if necessary.
GDI –
Troubleshooting
13A-18
Code No. P0110 Intake air temperature sensor system
Probable cause
Range of Check
Two seconds have passed since the ignition switch is turned ON or the
engine starting process is completed.
Set Conditions
The sensor output voltage is 4.6 V or more for four seconds (equivalent to
–45
C of intake air temperature)
or
The sensor output voltage is 0.2 V or more for four seconds (equivalent to
125
C of intake air temperature)
Malfunction of intake air temperature sensor
Open or short circuit in intake air temperature
sensor or loose connector contact
Malfunction of engine-ECU <M/T>
Malfunction of engine-A/T-ECU <A/T>
OK
Check the harness between the air
flow sensor and the engine-ECU
<M/T> or engine-A/T-ECU <A/T>,
and repair if necessary.
MUT-
II
Data list
13 Intake air temperature sensor
OK: Roughly the same as am-
bient temperature.
OK
Transient malfunction
(Refer to GROUP 00 – Points to
Note for Intermittent Malfunctions.)
NG
Check the intake air temperature
sensor itself.
(Refer to P.13A-105*.)
NG
Repair
OK
Measure at air flow sensor
connector A-73.
Disconnect the connector and
measure at the harness side.
(1) Resistance between terminal 5
and earth
OK: 2
Ω
or less
(2) Voltage between terminal 6 and
earth
(Ignition switch: ON)
OK: 4.8 – 5.2 V
(1) NG
NG
Repair
NG
Repair
NG
Check the following connectors:
B-86 <M/T>, B-85 <A/T>
NG
Repair
OK
Check the harness between the air
flow sensor and the engine-ECU
<M/T> or engine-A/T-ECU <A/T>.
NG
Repair
OK
Check the trouble symptoms.
NG
Replace the engine-ECU <M/T> or
engine-A/T-ECU <A/T>.
OK
Check following connector: A-73
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-73.
Ignition switch: ON
Voltage between terminal 62
<M/T>, 64 <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 between the air
flow sensor and the engine-ECU
<M/T> or engine-A/T-ECU <A/T>.
NG
Repair
OK
Check the trouble symptoms.
NG
Replace the engine-ECU <M/T> or
engine-A/T-ECU <A/T>.
OK
To the next page
Check the following connectors:
B-87 <M/T>, B-86 <A/T>
NOTE
*:
Refer to the ’99 SPACE STAR Workshop Manual (Pub. No. CMXE99E1).
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