Mitsubishi Pajero Pinin. Manual - part 108

MPI <4G9> – 

Troubleshooting

13C-18

Code No. P0110 Intake air temperature sensor system

Probable cause

Range of Check

D

2 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 four seconds (equivalent to
–45

_

C of intake air temperature)

or

D

The sensor output voltage is 0.2 V or more for four 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

To the next page

OK

Check the harness between the air
flow sensor and the engine-ECU.

NG

Repair

OK

Check the trouble symptoms.

NG

Replace the engine-ECU.

OK

OK

Check the harness between the air
flow sensor and the engine-ECU,
and repair if necessary.

MUT-

II

 Data list

13 Intake air temperature sensor

OK: Roughly the same as am-

bient temperature.

OK

Transient malfunction
(Refer to GROUP 00 – Points to
Note for Intermittent Malfunctions.)

NG

Check the intake air temperature
sensor itself. 
(Refer to P.13C-102.)

NG

Repair

OK

Measure at air flow sensor
connector A-71.

D

Disconnect the connector and
measure at the harness side.

(1) Resistance between terminal 5

and earth
OK: 2 

Ω

 or less

(2) Voltage between terminal 6 and

earth
(Ignition switch: ON)
OK: 4.8  – 5.2 V

(1) NG

NG

Repair

NG

Repair

OK

Check the harness between the air
flow sensor and the engine-ECU.

NG

Repair

Check the trouble symptoms.

NG

Replace the engine-ECU.

OK

Check the following connector:
A-71

NG

Repair

(2) NG

Measure at connector C-90.

D

Measure the voltage at the
engine-ECU terminal.

D

Disconnect connector A-71.

D

Ignition switch: ON

D

Voltage between terminal 72 and
earth
OK: 4.8  – 5.2 V

OK

Check the following connector:
C-90

Check the following connector:
C-90

NG

Check the following connector:
C-90

NG

Repair

MPI <4G9> – 

Troubleshooting

13C-19

OK

Measure at air flow sensor
connector A-71.

D

Use the test harness
(MB991709) to connect only
terminals 5 and 6, and then
measure at the pick-up harness.

D

Ignition switch: ON

D

Voltage between terminal 6 and
earth
OK: Ambient temperature  0

_

C:

3.2  – 3.8 V
Ambient temperature 20

_

C:

2.3  – 2.9 V
Ambient temperature 40

_

C:

1.5  – 2.1 V
Ambient temperature 80

_

C:

0.4  – 1.0 V

NG

Check the following connectors:
A-36, A-71, C-88

NG

Repair

OK

Check the harness between the air
flow sensor and the engine-ECU,
and repair if necessary.

OK

Check the trouble symptoms.

NG

Replace the engine-ECU.

From the previous page

MPI <4G9> – 

Troubleshooting

MPI <4G9> – 

Troubleshooting

13C-20

Code No. P0115 Engine coolant temperature sensor
system

Probable cause

Range of Check

D

Engine: Two seconds after the engine has been started

Set Conditions

D

The sensor output voltage is 4.6 V or more for four seconds (equivalent to
–45

_

C or lower of engine coolant temperature)

or

D

The sensor output voltage is 0.1 V or less for four seconds (equivalent to
140

_

C or higher of engine coolant temperature)

D

Malfunction of engine coolant temperature sensor

D

Open or short circuit in the engine coolant
temperature sensor circuit or loose connector
contact

D

Malfunction of engine-ECU

Range of Check

D

Engine: After starting

Set Conditions

D

The engine coolant temperature has reduced from over 40

_

C to less than

40

_

C, and that condition has lasted for five minutes or more.

OK

To the next page

MUT-

II

 Data list

21 Engine coolant temperature

sensor
OK: When the engine is cold,

the temperature is roughly
the same as ambient tem-
perature. If warm, it is 80
– 120

_

C.

OK

Transient malfunction
(Refer to GROUP 00 – Points to
Note for Intermittent Malfunctions.)

NG

NG

Replace

OK

Check the following connector:
A-69

NG

Repair

Measure at engine coolant
temperature sensor connector A-69.

D

Disconnect the connector and
measure at the harness side.

D

Resistance between terminals 1
and 2
OK: At 20

_

C of engine coolant

temperature: 2.1 – 2.7 k

Ω

At 80

_

C of engine coolant

temperature: 0.26 – 0.36
k

Ω

MPI <4G9> – 

Troubleshooting

13C-21

OK

Measure at engine coolant
temperature sensor connector A-69.

D

Use test harness (MB991658) to
connect the connector, and
measure at the pick-up harness.

D

Ignition switch: ON

D

Voltage between terminal 1 and
earth
OK: At 0

_

C of engine coolant

temperature: 3.2 – 3.8 V
At 20

_

C of engine coolant

temperature: 2.3 – 2.9 V
At 40

_

C of engine coolant

temperature: 1.3 – 1.9 V
At 80

_

C of engine coolant

temperature: 0.3 – 0.9 V

NG

Check the engine coolant
temperature sensor. 
(Refer to P.13C-102.)

NG

Repair

OK

Check the harness wire between
the engine coolant temperature
sensor and the engine-ECU, and
repair if necessary.

OK

Check the trouble symptoms.

NG

Replace the engine-ECU.

OK

Check the following connectors:
A-69, C-90

NG

Repair

OK

Check the harness wire between
the engine coolant temperature
sensor and the engine-ECU, and
repair if necessary.

OK

Measure at engine coolant
temperature sensor connector A-69.

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 2

and earth
OK: 2 

Ω

 or less

(1) NG

Measure at engine-ECU connector
C-90.

D

Measure the voltage at the
engine-ECU terminal.

D

Disconnect connector A-69.

D

Ignition switch: ON

D

Voltage between terminal 83 and
earth
OK: 4.8  – 5.2 V

OK

Check the following connector:
C-90

NG

Repair

NG

NG

Repair

OK

Check the trouble symptoms.

NG

Replace the engine-ECU.

(2) NG

OK

Repair

OK

Check the harness wire between
the engine coolant temperature
sensor and the engine-ECU.

NG

Repair

NG

Check the harness wire between
the engine coolant temperature
sensor and the engine-ECU.

NG

Repair

OK

Check the trouble symptoms.

NG

Replace the engine-ECU.

Check the following connector:
C-90

Check the following connector:
C-90

From the previous page