Mitsubishi FUEL Manual page 103

Code No. P0105 Barometric pressure sensor system
Range of Check
D Two seconds have passed since the ignition switch is turned ON or the
engine starting process is completed.
D Battery voltage: 8 V or more
Set Conditions
D The sensor output voltage is 4.5 V or more for four seconds (equivalent to
114 kPa of barometric pressure)
or
D The sensor output voltage is 0.2 V or less (equivalent to 53 kPa of
barometric pressure)
MUT-II Data list
25 Barometric pressure sensor
(Refer to P.13A-167, DATA LIST
REFERENCE TABLE.)
NG
Check the following connector:
B-12
OK
Measure at air flow sensor connector
B-12.
D 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 W or less
OK
Measure at air flow sensor connector
B-12.
D Connect connector terminals No.
1, No. 2 and No. 5 only by using
test harness (MB991709), and
measure at the pick-up harness.
D 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
OK
To the next page
MPI <6A1> -
OK
Transient malfunction
(Refer to GROUP 00 - Points to
Note for Intermittent Malfunctions.)
NG
Repair
(1) NG
Measure at engine-ECU connector
C-167.
D Measure the voltage at the
engine-ECU terminal.
D Ignition switch: ON
D Voltage between terminal 42 and
earth
OK: 4.8 - 5.2 V
Check the following connector:
C-167
Check the harness between the air
flow sensor and the engine-ECU.
Check the trouble symptoms.
(2) NG
Check the following connector:
C-167
Check the harness between the air
flow sensor and the engine-ECU.
Check the trouble symptoms.
(1) NG
Check the following connector:
(3) NG
C-167
Check the harness between the air
flow sensor and the engine-ECU,
and repair if necessary.
(2) NG
Replace the air flow sensor.
Check the trouble symptoms.
Check the following connector:
C-167
Check the harness between the air
flow sensor and the engine-ECU,
and repair if necessary.
Troubleshooting
Probable cause
D Malfunction of barometric pressure sensor
D Open or short circuit in barometric pressure
sensor circuit or loose connector contact
D Malfunction of engine-ECU
OK
NG
NG
OK
NG
OK
NG
NG
OK
NG
OK
NG
NG
OK
NG
NG
OK
13A-103
Check the following connector:
C-167
NG
OK
Repair
Check the harness between the air
flow sensor and the engine-ECU,
and repair if necessary.
Repair
Repair
Replace the engine-ECU.
Repair
Repair
Replace the engine-ECU.
Repair
Repair