Mitsubishi Lancer Evolution-VII Workshop Manual page 720

13A-16
From the previous page
OK
Measure at the B-31 air flow sensor
connector.
D Using the test harness
(MB991709), connect only
connector terminals No. 1, No. 2,
and No. 5, and measure at the
pickup harness.
D Ignition switch: ON
(1) Voltage between terminal No. 1
and earth
OK: 4.9 - 5.1 V
(2) Voltage between terminal No. 5
and earth
OK: Less than 0.5 V
(3) Voltage from No. 2 to earth
OK: High 0 m 3.8 - 4.2 V
High 600 m 3.5 - 3.9 V
High 1,200 m 3.3 - 3.7 V
High 1,800 m 3.0 - 3.4 V
OK
Measure at the C-115 engine-ECU
connector.
D Measure the engine-ECU terminal
voltage.
D Ignition switch: ON
D Voltage between terminal No. 85
and earth.
OK: High 0 m 3.8 - 4.2 V
High 600 m 3.5 - 3.9 V
High 1,200 m 3.3 - 3.7 V
High 1,800 m 3.0 - 3.4 V
OK
Check the following connector:
C-115
OK
MUT-II Data list
D No. 25 Barometric pressure
sensor (Refer to P.13A-103.)
OK
Intermittent malfunction
(Refer to GROUP 00 - Points to Note
for Intermittent Malfunctions.)
Code No. P0110 Intake air temperature sensor system
Inspection Range
D After setting the ignition switch to the "ON" position, or after 2 seconds from
completion of start.
Evaluation Conditions
D The sensor output voltage is more than 4.6 V for 4 seconds (Equivalent to intake
air temperature less than - 40_C)
or
D The sensor output voltage is less than 0.2 V for 4 seconds (Equivalent to intake
air temperature of more than 120_C)
MPI -
Troubleshooting
(1), (2) NG
Check the following connectors:
C-115
Check and repair the harness between
the air flow sensor and engine-ECU.
D Check for damage of the power
cable.
D Check for damage of the earth
wire.
(3) NG
Check the following connector:
C-115
Check the harness between the air
flow sensor and engine-ECU.
D Check for short-circuit and
damage of the output wire.
Replace the air flow sensor.
NG
Check the following connector:
C-115
Check and repair the harness between
the air flow sensor and engine-ECU.
D Check for disconnection and
damage of the output wire.
NG
Repair
NG
Replace engine-ECU.
NG
OK
NG
OK
NG
OK
NG
OK
Probable cause
D Intake air temperature sensor malfunction
D Intake air temperature sensor circuit disconnection,
short-circuit, or connector contact defect
D Engine-ECU malfunction
Repair
Repair
Repair
Repair