MPI <4G9> -
Troubleshooting
13A-94
Code No. P0105 Barometric pressure sensor system
Probable cause
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)
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 <M/T>
D
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>.
NG
Repair
OK
Check the trouble symptoms.
NG
Replace the engine-ECU <M/T> or
engine-A/T-ECU <A/T>.
(2) NG
Check the following connector:
B-34 <M/T>, B-94 <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 the harness between the air
flow sensor and the engine-ECU
<M/T> or engine-A/T-ECU <A/T>,
and repair if necessary.
NG
Repair
MUT-
II
Data list
25 Barometric pressure sensor
(Refer to P.13A-153, 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-99.
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
(1) NG
Measure at engine-ECU <M/T> or
engine-A/T-ECU <A/T> connector
B-34 <M/T>, B-94 <A/T>.
D
Measure the voltage at the
engine-ECU <M/T> or
engine-A/T-ECU terminal <A/T>.
D
Ignition switch: ON
D
Voltage between terminal 81
<M/T>, 46 <A/T> and earth
OK:
4.8 - 5.2 V
OK
Check the following connector:
B-34 <M/T>, B-94 <A/T>
NG
Check the following connector:
B-34 <M/T>, B-94 <A/T>
NG
Repair
OK
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Check the following connector:
A-99