MPI <4G1> -
Troubleshooting
13A-12
Code No. P0110 Intake air temperature 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.
Set Conditions
D
The sensor output voltage is 4.6 V or more for two seconds (equivalent to
-45
_
C of intake air temperature)
or
D
The sensor output voltage is 0.2 V or more for two seconds (equivalent to
125
_
C of intake air temperature)
D
Malfunction of intake air temperature sensor
D
Open or short circuit in intake air temperature
sensor or loose connector contact
D
Malfunction of engine-ECU
OK
Check the trouble symptoms.
NG
Replace the engine-ECU.
OK
To the next page
OK
Check the harness between the
intake air temperature sensor and
the engine-ECU.
NG
Repair
NG
Check the following connector:
B-34
NG
Repair
OK
Check the harness between the air
flow sensor and the engine-ECU,
and repair if necessary.
NG
Repair
OK
Check the following connector:
B-34
(2) NG
Measure at engine-ECU connector
B-34.
D
Measure the voltage at the
engine-ECU terminal.
D
Disconnect connector A-54.
D
Ignition switch: ON
D
Voltage between terminal 81 and
earth
OK:
4.8 - 5.2 V
OK
Check the trouble symptoms.
NG
Replace the engine-ECU.
OK
Check the harness between the
intake air temperature sensor and
the engine-ECU.
NG
Repair
(1) NG
NG
Repair
Check the following connector:
B-34
OK
Measure at vacuum sensor
connector A-54.
D
Disconnect the connector and
measure at the harness side.
(1) Resistance between terminal 2
and earth
OK:
2
W
or less
(2) Voltage between terminal 3 and
earth
(Ignition switch: ON)
OK:
4.8 - 5.2 V
OK
Check the following connector:
A-54
NG
Repair
NG
Check the intake air temperature
sensor. (Refer to P.13A-80.)
NG
Repair
MUT-
II
Data list
13 Intake air temperature sensor
OK:
Roughly the same as ambi-
ent temperature.
OK
Transient malfunction
(Refer to GROUP 00 - Points to
Note for Intermittent Malfunctions.)