Mitsubishi Pajero Pinin. Manual - part 37

GDI – 

Troubleshooting

13A-14

INSPECTION CHART FOR DIAGNOSIS CODES

Code No.

Diagnosis item

Reference page

11

Oxygen sensor system

13A-15

12

Air flow sensor system

13A-16

13

Intake air temperature sensor system

13A-17

14

Throttle position sensor (2nd channel) system

13A-18

21

Engine coolant temperature sensor system

13A-19

22

Crank angle sensor system

13A-20

23

Camshaft position sensor system

13A-21

24

Vehicle speed sensor system

13A-22

25

Barometric pressure sensor system

13A-23

31

Detonation sensor system

13A-24

41

Injector system

13A-25

44

Abnormal combustion

13A-27

54

Immobilizer system

13A-28

56

Abnormal fuel pressure system

13A-29

61

Communication line with A/T-ECU system

13A-31

64

Alternator FR terminal system

13A-31

66

Brake vacuum sensor system

13A-32

77

Accelerator pedal position sensor (2nd channel) system

13A-33

78

Accelerator pedal position sensor (1st channel) system

13A-34

79

Throttle position sensor (1st channel) system

13A-35

89

Abnormality in fuel pressure system

13A-36

91

Electronic-controlled throttle valve system

13A-36

92

Throttle valve position feedback system

13A-37

94

Communication line system with throttle valve controller

13A-37

95

Malfunction in throttle valve control servo motor (1st motor) system

13A-38

99

Malfunction in throttle valve control servo motor (2nd motor) system

13A-38

NOTE
Code No. 56 may be also output when air is sucked in high-pressure fuel line due to no fuel supply.

GDI – 

Troubleshooting

13A-15

INSPECTION PROCEDURE FOR DIAGNOSIS CODES

Code No.11 Oxygen sensor system

Probable cause

Range of check

D

3 minutes have passed after engine was started.

D

Engine coolant temperature is approx. 80

°

C or more.

D

Intake air temperature is 20 – 50

°

C.

D

Engine speed is approx. 2,000 – 3,000 r/min.

D

Vehicle is moving at constant speed on a flat, level road surface.

Set conditions

D

The oxygen sensor output voltage is around 0.6 V for 30 seconds (does
not cross 0.6 V for 30 seconds).

D

When the range of check operations given above which accompany starting
of the engine are carried out four time in succession, a problem is detected
after each operation.

D

Malfunction of the oxygen sensor

D

Improper connector contact, open circuit or
short-circuited harness wire

D

Malfunction of the engine-ECU

NG

Repair

OK

Replace the engine-ECU.

NG

OK

Check trouble symptom.

OK

Check the following connector: C-19

NG

Check the harness wire between the engine-
ECU and the oxygen sensor connector.

OK

Check trouble symptom.

OK

Measure at the oxygen sensor connector A-67.

D

Disconnect the connector, and measure at the
harness side.

(1) Voltage between 1 and earth (Ignition switch: ON)

OK: System voltage

(2) Continuity between 2 and earth

OK: Continuity

(1) NG

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

Check the oxygen sensor. (Refer to P.13A-105.)

NG

Replace

(2) NG

Check the harness wire between the oxygen
sensor and the engine control relay connector,
and repair if necessary.

NG

Repair

Measure at the engine-ECU connector C-29.

D

Disconnect the connector, and measure at the
harness side.

D

Voltage between 89 and earth (Ignition switch: ON)
OK: System voltage

Repair

NG

Check the harness wire between the engine-
ECU and the oxygen sensor connector, and
repair if necessary.

OK

Check trouble symptom.

Check the following connectors: A-67

OK

NG

Replace

Check the harness wire between the engine-ECU and
the oxygen sensor connector.

Replace the engine-ECU.

NG

OK

NG

Replace

NG

NG

Check trouble symptom.

NG

OK

Check the following connector: A-36

Repair

GDI – 

Troubleshooting

13A-16

Code No.12 Air flow sensor system

Probable cause

Range of check

D

Engine speed is 500 r/min or more.

Set conditions

D

Sensor output frequency is 3.3 Hz or less for 4 seconds.

D

Malfunction of the air flow sensor

D

Open circuit or short-circuited harness wire of air
flow sensor circuit

D

Malfunction of the engine-ECU

NG

Repair

NG

Repair

OK

Replace the engine-ECU.

NG

Repair

NG

Replace the air flow sensor.

NG

Repair

NG

Replace the air flow sensor.

NG

Repair

OK

Replace the engine-ECU.

NG

OK

Check trouble symptom.

OK

Check the following connector:
C-19

OK

Check trouble symptom.

(2) NG

Measure at the engine-ECU connector
C-19.

D

Connect the connector

D

Voltage between 76 and earth
(Ignition switch: ON)
OK: 6 – 9 V

NG

Check the following connector:
A-71

OK

Check trouble symptom.

OK

Check the following connector:
A-71

NG

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

OK

Check trouble symptom.

(2), (3) NG

Check the following connectors:
A-36, C-18, C-19

Measure at the air flow sensor connec-
tor A-71.

D

Connect the connector

(Use the test harness MB991709)
(1) Voltage between 3 and earth

(Engine: Idling)
OK: 2.2 – 3.2 V

(2) Voltage between 7 and earth

OK: 0 – 0.1 V

(Engine: Idling)

OK: 6 – 9 V

(Engine speed: 4,000
r/min)

(1) NG

Measure at the air flow sensor connec-
tor A-71.

D

Disconnect the connector, and
measure at the harness side.

(1) Voltage between 4 and earth

(Ignition switch: ON)
OK: System voltage

(2) Voltage between 3 and earth

(Ignition switch: ON)
OK: 4.8 – 5.2 V

(3) Continuity between 5 and earth

OK: Continuity

(1) NG

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

NG

Repair

OK

Check trouble symptom.

Check the following connector:
A-36

NG

GDI – 

Troubleshooting

13A-17

Code No.13 Intake air temperature sensor system

Probable cause

Range of check

D

After 60 seconds have passed since the engine have started

Set conditions

D

Sensor resistance is 0.14 k

Ω

 or less for 4 seconds.

or

D

Sensor resistance is 50 k

Ω

 or more for 4 seconds.

D

Malfunction of the intake air temperature sensor

D

Open circuit or short-circuited harness wire of the
intake air temperature sensor circuit

D

Malfunction of the engine-ECU

NG

Repair

NG

Repair

OK

Replace the engine-ECU.

NG

Repair

NG

OK

Check trouble symptom.

OK

Check the following connector: A-71

NG

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

OK

Check trouble symptom.

OK

Measure at the air flow sensor connector A-71.

D

Disconnect the connector, and measure at the harness
side.

D

Voltage between 6 and earth
(Ignition switch: ON)
OK: 4.5 – 4.9 V

D

Continuity between 5 and earth
OK: Continuity

NG

Check the following connectors: A-36, C-18, C-19

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

NG

Replace the air flow sensor.