Mitsubishi Pajero Pinin. Manual - part 39

GDI – 

Troubleshooting

13A-22

Code No. 24 Vehicles speed sensor system

Probable cause

Range of check

D

Ignition switch: ON

D

Excluding 60 seconds after the ignition switch is turned to ON or immediately
after the engine starts.

D

Engine speed is 3,000 r/min or more.

D

Driving under high engine load conditions.

Set conditions

D

Sensor output voltage does not change for 4 seconds (no pulse signal input).

D

Malfunction of the vehicle speed sensor

D

Improper connector contact, open circuit or
short-circuited harness wire of the vehicle speed
sensor circuit

D

Malfunction of the engine-ECU

Does the speedometer operate normally?

No

Check the vehicle speed sensor circuit. (Refer to GROUP 54
– Combination Meter.)

Yes

Measure at engine-ECU connector C-19.

D

Connect the connector.

D

Voltage between terminal 80 and earth
(Ignition switch: ON)
OK: If the vehicle is moved forward without starting the engine,

0 V and system voltage alternates.

OK

Check the following connector: C-19

NG

Repair

OK

Check trouble symptom.

NG

Replace the engine-ECU.

NG

Check the following connectors: 
C-28, C-38 <LHD>, C-41 <RHD>, D-02

NG

Repair

OK

Check trouble symptom.

NG

Check the harness wire between the vehicle speed sensor and
engine-ECU.

GDI – 

Troubleshooting

13A-23

Code No.25 Barometric pressure sensor system

Probable cause

Range of check

D

After 60 seconds have passed since the engine have started

D

Battery voltage is 8 V or more.

Set conditions

D

Sensor output voltage is 0.2 V or less for 4 seconds. (This condition
corresponds to that the barometric pressure is 53 kPa or less.)

or

D

Sensor output voltage is 4.5 V or more for 4 seconds. (This condition
corresponds to that the barometric pressure is 114 kPa or more.)

D

Malfunction of the barometric pressure sensor

D

Open circuit or short-circuited harness wire of the
barometric pressure sensor

D

Malfunction of the engine-ECU

NG

Repair

NG

Repair

OK

Replace the engine-ECU.

NG

Repair

NG

Repair

OK

Replace the air flow sensor.

OK

NG

Repair

OK

Check the following connectors:
A-71, C-18

OK

Check trouble symptom.

NG

Replace the engine-ECU.

OK

Measure at the engine-ECU connector
C-18.

D

Connect the connector.

D

Voltage between 51 and earth
(Ignition switch: ON)
OK: 3.7 – 4.3 V 

(at altitude of 0 m)
3.2 – 3.8 V 
(at altitude of 1,200 m)

NG

Check the harness wire between the
engine-ECU and the barometric pres-
sure sensor, and repair if necessary.

NG

Check the harness wire between the
engine-ECU and the barometric pres-
sure sensor.

OK

Check trouble symptom.

OK

Check the following connector:
A-71

NG

Check the harness wire between the
engine-ECU and the barometric pres-
sure sensor.

OK

Check trouble symptom.

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

D

Connect the connector. (Use test
harness MB991709)

D

Voltage between 2 and earth
(Ignition switch: ON)
OK: 3.7 – 4.3 V 

(at altitude of 0 m)
3.2 – 3.8 V 
(at altitude of 1,200 m)

NG

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

D

Disconnect the connector, and
measure at the harness side.

(1) Voltage between 1 and earth

(Ignition switch: ON)
OK: 4.8 – 5.2 V

(2) Continuity between 5 and earth

OK: Continuity

NG

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

GDI – 

Troubleshooting

13A-24

Code No.31 Detonation sensor system

Probable cause

Range of check

D

After 60 seconds have passed since the engine have started

Set conditions

D

Amount of change in the sensor output voltage (detonation sensor peak
voltage for each half rotation of the crankshaft) is 0.06 V or less for 200
continuous times.

D

Malfunction of the detonation sensor

D

Open circuit or short-circuited harness wire of the
detonation sensor

D

Malfunction of the engine-ECU

NG

Repair

NG

Replace the engine-ECU.

NG

Check the harness wire between the
detonation sensor and the earth, and
repair if necessary.

Check trouble symptom.

OK

Replace the detonation sensor.

OK

Check trouble symptom.

NG

Check the harness wire between the
engine-ECU and the detonation sensor.

Measure at the detonation sensor con-
nector A-81.

D

Disconnect the connector, and
measure at the harness side.

D

Continuity between 2 and earth
OK: Continuity

OK

Check the following connector:
C-19

NG

Repair

GDI – 

Troubleshooting

13A-25

Code No.41 Injector system

Probable cause

Range of check

D

Engine: while cranking, or running

D

Engine speed: 4,000 r/min or less

D

System voltage: 10 V or more

D

Fuel shut off, or while forcible activating of injector (actuator test) is in operation.

Set conditions

D

Injector open circuit check signal is not output from the injector predetermined
time(s).

D

Malfunction of the injector

D

Faulty injector driver relay

D

Faulty injector driver

D

Open circuit or short-circuited harness wire in the
injector drive circuit, or poor connector contact

D

Malfunction of the engine-ECU

(2) NG

Check the following connector:
A-36

OK

Check trouble symptom.

(2) NG

Check the harness wire between the
injector driver and earth, and repair if
necessary.

(3) NG

Check the following connectors:
A-61, A-62, A-63, A-64, A-78

OK

Check trouble symptom.

Check the injector. (Refer to
P.13A-106.)

NG

Replace

OK

(1) NG

Check the following connectors:
C-72, C-74

OK

Check trouble symptom.

NG

Check the harness wire between the
injector driver relay and ignition switch,
and repair if necessary.

NG

Repair

NG

Check the harness wire between the
injector driver relay and battery, and
repair if necessary.

NG

Repair

OK

Measure at engine-ECU connector
C-18.

D

Disconnect the connector, and
measure at the harness side.

D

Voltage between terminal 55 and
earth (Ignition switch: ON)
OK: System voltage

NG

Check the following connector:
A-44X

OK

Check trouble symptom.

NG

Check the harness wire between the
injector driver relay and engine-ECU,
and repair if necessary.

NG

Repair

OK

Measure at injector driver connector
A-55.

D

Disconnect the connector, and
measure at the harness side.

(1) Voltage between 12, 21 and earth

(Ignition switch: ON)
OK: System voltage

(2) Continuity between 13, 22 and earth

OK: Continuity

(3) Resistance between terminals 14

and 23
Resistance between terminals 15
and 24
Resistance between terminals 16
and 25
Resistance between terminals 17
and 26
OK: 0.9 – 1.1 

Ω

(1) NG

Check the following connector:
A-44X

OK

Check trouble symptom.

NG

Check the harness wire between the
injector driver and injector driver relay,
and repair if necessary.

NG

Repair

NG

Check the harness wire between the
injector driver and injector, and repair
if necessary.

NG

Repair

OK

To the next page

Measure at injector driver relay connec-
tor A-44X.

D

Disconnect the connector, and
measure at the harness side.

(1) Voltage between terminal 4 and

earth
(Ignition switch: ON)
OK: System voltage

(2) Voltage between terminal 3 and

earth
OK: System voltage