Mitsubishi Electric Lancer Evolution-VII Workshop Manual page 1152

Code No. P0105 Barometric pressure sensor system
Inspection Range
D 2 seconds after the ignition switch is set to the "ON" position, or after the
completion of start of engine.
Evaluation Conditions
D The sensor output voltage is more than 4.5 V for 4 seconds (Equivalent to
air pressure of more than 114 kPa)
or
D The sensor output voltage is less than 0.2 V for 4 seconds (Equivalent to air
pressure of less than 5 kPa)
MUT-II Data list
D No. 25 Barometric pressure
sensor (Refer to P.13A-103.)
NG
Check the following connector:
B-31
OK
Measure at the B-31 air flow sensor
connector.
D Disconnect the connector to
measure at the harness side
(1) Voltage between terminal No. 1
and earth
(Ignition switch: ON)
OK: 4.9 - 5.1 V
(2) Resistance between terminal No.
5 and earth.
OK: Less than 2 Ω
OK
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MPI -
Troubleshooting
OK
Intermittent malfunction
(Refer to GROUP 00 - Points to Note
for Intermittent Malfunctions.)
NG
Repair
(1) NG
Measure at the C-115 engine-ECU
connector.
D Measure the engine-ECU terminal
voltage.
D Ignition switch: ON
D Voltage between terminal No. 81
and earth
OK: 4.9 - 5.1 V
Check the following connector:
C-115
Check the harness between the air
flow sensor and engine-ECU.
D Check for short-circuit of the
power cable.
MUT-II Data list
D No. 25 Barometric pressure
sensor (Refer to P.13A-103.)
Intermittent malfunction
(Refer to GROUP 00 - Points to Note
for Intermittent Malfunctions.)
(2) NG
Check the following connector:
C-115
Check the harness between the air
flow sensor and engine-ECU.
D Check the earth wire for
disconnection and damage.
MUT-II Data list
D No. 25 Barometric pressure
sensor (Refer to P.13A-103.)
Intermittent malfunction
(Refer to GROUP 00 - Points to Note
for Intermittent Malfunctions.)
Probable cause
D Barometric pressure sensor malfunction
D Barometric pressure sensor circuit disconnection,
short-circuit, or connector contact defect
D Engine-ECU malfunction
OK
NG
NG
OK
NG
OK
NG
OK
NG
OK
NG
OK
NG
OK
13A-15
Check the following connector:
C-115
OK NG
Repair
Check and repair the harness between
the air flow sensor and engine-ECU.
D Check for disconnection of the
power cable.
Repair
Repair
Replace engine-ECU.
Repair
Repair
Replace engine-ECU.