Mitsubishi Pajero Pinin. Manual - part 66

GDI  – 

Troubleshooting

13A-13

Code No.

Reference page

Diagnosis item

P1221



Throttle valve position feedback system

13A-55

P1223



Communication line with throttle valve controller

13A-56

P1224



Throttle valve control servo motor (motor 1st phase malfunction) system

13A-57

P1225



Accelerator pedal position sensor (2nd channel) system

13A-58

P1228



Throttle valve control servo motor (motor 2nd phase malfunction) system

13A-60

P1500

Alternator FR terminal system

13A-61

P1515

Brake vacuum sensor system

13A-62

P1600

Communication wire with A/T-ECU system

13A-64

P1610

Immobilizer system

13A-64

NOTE
1.

Do not replace the engine-ECU until a through terminal check reveals there are no short/open circuit.

2.

Check that the engine-ECU earth circuit is normal before checking for the cause of the problem.

3.

After the engine-ECU has detected a malfunction, a diagnosis code is recorded the next time the
engine is started and the same malfunction is re-detected. However, for items marked with a “



”,

the diagnosis code is recorded on the first detection of the malfunction.

4.

Sensor 1 indicates the sensor mounted at a position closest to the engine, and sensor 2 indicates
the sensor mounted at the position second closest to the engine.

GDI  – 

Troubleshooting

13A-14

INSPECTION PROCEDURE CLASSIFIED BY DIAGNOSIS CODE

Code No. P0100 Air flow sensor system

Probable cause

Range of Check



Engine speed: 500 r/min or more

Set Conditions



The sensor output frequency is 3.3 Hz or less for four seconds.



Malfunction of air flow sensor



Open or short circuit in air flow sensor circuit or
loose connector contact



Malfunction of engine-ECU

OK

(3) NG

Check the following connectors:
A-36, C-19

NG

Repair

(2) NG

Check the following connector:
A-36

NG

Repair

OK

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

MUT-

II

 Data list

12 Air flow sensor (Refer to
P.13A-94, DATA LIST REFERENCE
TABLE.)

OK

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

NG

Check the following connector:
A-71

NG

Repair

OK

Measure at air flow sensor
connector A-71.



Disconnect the connector and
measure at the harness side.

(1) Voltage between terminal 3 and

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

(2) Voltage between terminal 4 and

earth (Ignition switch: ON)
OK: System voltage

(3) Resistance between terminal 5

and earth
OK: 2 

Ω

 or less

(1) NG

Measure at engine-ECU connector
C-18.



Measure the voltage at the
engine-ECU terminal



Ignition switch: ON



Voltage between terminal 61 and
earth
OK: 4.8  – 5.2 V

OK

NG

Repair

NG

Check the following connector:
C-18

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 harness between the air
flow sensor and the engine control
relay, and repair if necessary.

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

To the next page

Check the following connector:
C-18

GDI  – 

Troubleshooting

13A-15

OK

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

NG

Repair

Check the harnesses between the
air flow sensor and the engine-ECU
and between the air flow sensor
and the engine control relay, and
repair if necessary.

OK

Measure at air flow sensor
connector A-71.



Use test harness (MB991709) to
connect the connector, and
measure at the pick-up harness.



Selector lever position: P



Voltage between terminal 7 and
earth
OK: Engine: Idling

0  – 1 V
Engine speed: 3,000 r/min
6  – 9 V

NG

Check the following connector:
C-19

NG

Repair

OK

Check the trouble symptoms.

NG

Replace the engine-ECU.

Check the trouble symptoms.

NG

Check the following connector:
C-18

NG

Repair

OK

Measure the output wave form at
air flow sensor connector A-71 (by
using an analyzer).



Use test harness (MB991709) to
connect the connector, and
measure at the pick-up harness.



Engine: Idling



Voltage between terminal 3 and
earth
OK: Waveforms should be dis-

played on P.13A-84* (In-
spection Procedure Using
an Analyzer) and noise
should not be displayed in
the waveform.

NG

Replace the air flow sensor.

OK

Check the trouble symptoms.

NG

Replace the engine-ECU .

OK

OK

Replace the air flow sensor.

OK

Measure at air flow sensor
connector A-71.



Use test harness (MB991709) to
connect the connector, and
measure at the pick-up harness.



Ignition switch: ON



Voltage between terminal 7 and
earth
OK: 7  – 8 V

NG

Check the following connector:
C-19

NG

Repair

OK

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

NG

Repair

From the previous page

NOTE
*:

Refer to the ’00 PAJERO PININ Workshop Manual (Pub. No. CKRE00E1).

GDI  – 

Troubleshooting

13A-16

Code No. P0105 Barometric pressure sensor system

Probable cause

Range of Check



Two seconds have passed since the ignition switch is turned ON or the
engine starting process is completed.



Battery voltage: 8 V or more

Set Conditions



The sensor output voltage is 4.5 V or more for four seconds (equivalent to
114 kPa of barometric pressure)

or



The sensor output voltage is 0.2 V or less (equivalent to 53 kPa of
barometric pressure)



Malfunction of barometric pressure sensor



Open or short circuit in barometric pressure
sensor circuit or loose connector contact



Malfunction of engine-ECU

(2) NG

Check the following connector:
A-36, C-19

NG

Repair

OK

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

MUT-

II

 Data list

25 Barometric pressure sensor

(Refer to P.13A-94, DATA LIST
REFERENCE TABLE.)

OK

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

NG

NG

Repair

OK

(1) NG

Measure at engine-ECU connector
C-18.



Measure the voltage at the
engine-ECU terminal.



Ignition switch: ON



Voltage between terminal 41 and
earth
OK: 4.8  – 5.2 V

OK

Check the following connector:
C-18

NG

Repair

NG

Check the following connector:
C-18

NG

Repair

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

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.

Check the following connector:
A-71

Measure at air flow sensor
connector A-71.



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 

Ω

 or less