Mitsubishi Pajero Pinin. Manual - part 80

GDI  – 

Troubleshooting

13A-69

Check trouble symptom.

OK

NG

Replace the injector.

OK

Check ignition coil spark for each cylinder.
(1) Remove the ignition coil.
(2) Install a new spark plug to the removed ignition coil.
(3) Disconnect the injector intermediate connector.

Caution
Never touch the connector terminal as approx. 100 V is
applied to the injector, or you are seriously injured.

(4) Earth the spark plug electrode securely.
(5) Check that the spark plug ignites when the engine is cranked.

NG

Replace the ignition coil.

OK

Check all the following items:



Spark plug



Compression pressure



Foreign material (such as water or kerosine) entered the fuel
lines

From the previous page

GDI  – 

Troubleshooting

13A-70

INSPECTION PROCEDURE 6

Initial combustion takes place, but does not complete
(start impossible), too long time to start (poor start)

Probable cause

This may be caused by improper spark plug ignition (poor spark), improper mixture
during engine cranking, improper fuel pressure.



Malfunction of the fuel supply system



Malfunction of the fuel pressure sensor



Malfunction of the ignition system



Malfunction of the electronic-controlled throttle valve
system



Malfunction of the engine-ECU <M/T>



Malfunction of the engine-A/T-ECU <A/T>

Check trouble symptom.

OK

NG

Replace the injector.

OK

Check all the following items:



Spark plug



Compression pressure



Foreign material (such as water or kerosine) entered the fuel
lines

OK

Check ignition coil spark for each cylinder.
(1) Remove the ignition coil.
(2) Install a new spark plug to the removed ignition coil.
(3) Disconnect the injector intermediate connector.

Caution
Never touch the connector terminal as approx. 100 V is
applied to the injector, or you are seriously injured.

(4) Earth the spark plug electrode securely.
(5) Check that the spark plug ignites when the engine is cranked.

NG

Replace the ignition coil.

OK

Check ignition timing when the engine is cranked.
OK: approx. 5



 BTDC

NG

Check that the crank angle sensor and timing belt cover are proper-
ly installed.

No

MUT-

II

 Data list

79 Throttle position sensor (1st channel) (Refer to P.13A-94.)

NG

Check the throttle valve position feedback system. 
(Refer to P.13A-55, INSPECTION PROCEDURE FOR DIAGNO-
SIS CODE P1221.)

OK

Is the engine started normally when it is cranked with the accelera-
tor pedal depressed slightly?

Yes

Clean around the throttle valve. (Refer to P.13A-92*.)

Check fuel leakage. (Refer to P.13A-99*.)

NG

Repair

OK

OK

MUT-

II

 Data list

74 Fuel pressure sensor (Refer to P.13A-94.)

NG

Check an abnormal fuel pressure system. (Refer to P.13A-33,
INSPECTION PROCEDURE FOR DIAGNOSIS CODE P0190.)

OK

MUT-

II

 Data list

18 Cranking signal (Refer to P.13A-94.)

NG

Check the ignition switch-ST system. <M/T>
(Refer to P.13A-89, INSPECTION PROCEDURE 26.)
Check the ignition switch-ST system and inhibitor switch sytem.
<A/T> (Refer to P.13A-89, INSPECTION PROCEDURE 27.)

OK

MUT-

II

 Data list

21 Engine coolant temperature sensor (Refer to P.13A-94.)

NG

Check the engine coolant temperature system. (Refer to P.13A-19,
INSPECTION PROCEDURE FOR DIAGNOSIS CODE P0115.)

No

MUT-

II

 Actuator test

07 Fuel pump (low pressure) (Refer to P.13A-100.)

NG

Check the fuel pump (low pressure) system. 
(Refer to P.13A-91, INSPECTION PROCEDURE 29.)

OK

MUT-

II

 Self-Diag code

Is a diagnosis code displayed?

Yes

Refer to P.13A-12, INSPECTION CHART FOR DIAGNOSIS
CODES.

Check system voltage while the engine is cranking.
OK: 8 V or more

NG

Check the battery. (Refer to GROUP 55 – Battery.)

NOTE
*:

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

GDI  – 

Troubleshooting

13A-71

INSPECTION PROCEDURE 7

Unstable idling (rough idle, hunting)

Probable cause

This malfunction is probably caused by a faulty ignition system, improper air/fuel
ratio, a faulty electronic-controlled throttle valve system, improper compression
pressure, etc. As many causes can be suspected, diagnose from easier items.



Malfunction of the ignition system



Malfunction of the air/fuel ratio control system



Malfunction of the electronic-control throttle valve
system



Improper compression pressure



Air sucking into the air intake system

OK

MUT-

II

 Data list

11 Oxygen sensor (front)

OK: 600  – 1,000 mV when the engine is suddenly raced

NG

Check the oxygen sensor (front) system. (Refer to P.13A-25, IN-
SPECTION PROCEDURE FOR DIAGNOSIS CODE P0130.)

OK

MUT-

II

 Data list

59 Oxygen sensor (rear)



Transmission: 2nd gear <M/T>, L range <A/T>



Driving with throttle widely open
OK: 600  – 1,000 mV

NG

Check the oxygen sensor (rear) system. (Refer to P.13A-28, IN-
SPECTION PROCEDURE FOR DIAGNOSIS CODE P0136.)

OK

MUT-

II

 Actuator test

08 Purge control solenoid valve (Refer to P.13A-100.)

NG

Check the purge control solenoid valve system. (Refer to P.13A-52,
INSPECTION PROCEDURE FOR DIAGNOSIS CODE P0443.)

OK

MUT-

II

 Data list

21 Engine coolant temperature sensor (Refer to P.13A-94.)

NG

Check the engine coolant temperature sensor. (Refer to P.13A-19,
INSPECTION PROCEDURE FOR DIAGNOSIS CODE P0115.)

OK

MUT-

II

 Data list

25 Barometric pressure sensor (Refer to P.13A-94.)

NG

Check the barometric pressure sensor system. (Refer to P.13A-16,
INSPECTION PROCEDURE FOR DIAGNOSIS CODE P0105.)

OK

MUT-

II

 Data list

13 Intake air temperature sensor (Refer to P.13A-94.)

NG

Check the intake air temperature sensor system. 
(Refer to P.13A-18, INSPECTION PROCEDURE FOR DIAGNO-
SIS CODE P0110.)

OK

MUT-

II

 Data list

26 Accelerator pedal position switch (Refer to P.13A-94.)

NG

Check the accelerator pedal position switch system. (Refer to
P.13A-90, INSPECTION PROCEDURE 28.)

No

MUT-

II

 Data list

79 Throttle position sensor (1st channel) (Refer to P.13A-94.)

NG

Check the throttle valve position feedback system. 
(Refer to P.13A-55, INSPECTION PROCEDURE FOR DIAGNO-
SIS CODE P1221.)

No

Does the engine idle speed fluctuates excessively (excessive
hunting)?

Yes

Clean around the throttle valve. (Refer to P.13A-92*.)

No

MUT-

II

 Self-Diag code

Is a diagnosis code displayed?

Yes

Refer to P.13A-12, INSPECTION CHART FOR DIAGNOSIS
CODES.

Has the battery been disconnected recently?

Yes

Warm up the engine, and then let it run at idle for approx. ten
minutes.

OK

To the next page

NOTE
*:

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

GDI  – 

Troubleshooting

13A-72

OK

Check all the following items in that order.
(1) Spark plugs
(2) Exhaust gas emission control system
(3) EGR system
(4) Compression pressure
(5) Foreign material (such as water or kerosine) entered the fuel

line.

(6) Air is sucked in the air intake system, or EGR gas leaks.



Damaged intake manifold gasket



Damaged air intake hose



Damaged vacuum hose



Faulty EGR valve seat

Check ignition coil spark for each cylinder.
(1) Remove the ignition coil.
(2) Install a new spark plug to the removed ignition coil.
(3) Disconnect the injector intermediate connector.

Caution
Never touch the connector terminal as approx. 100 V is
applied to the injector, or you are seriously injured.

(4) Earth the spark plug electrode securely.
(5) Check that the spark plug ignites when the engine is cranked.

NG

Replace the ignition coil.

NG

Check trouble symptom.

OK

Clean around the throttle valve. (Refer to P.13A-92*.)

OK

NG

Check that the crank angle sensor and timing belt cover are proper-
ly installed.

Check ignition timing. (Refer to GROUP 11A – Engine Adjustment.)

OK

MUT-

II

 Data list

68 EGR valve (Refer to P.13A-94.)

NG

Check the EGR valve. (Refer to P.13A-50, INSPECTION PROCE-
DURE FOR DIAGNOSIS CODE P0403.)

OK

MUT-

II

 Data list

31 Small lamp switch (Refer to P.13A-94.)

NG

Check the small lamp switch system. (Refer to P.13A-93, INSPEC-
TION PROCEDURE 33.)

MUT-

II

 Data list

67 Stop lamp switch (Refer to P.13A-94.)

NG

Check the stop lamp switch. (Refer to P.13A-93, INSPECTION
PROCEDURE 32.)

OK

OK

MUT-

II

 Data list

28 A/C switch (Refer to P.13A-94.)

NG

Check the A/C switch and A/C relay system. (Refer to P.13A-92,
INSPECTION PROCEDURE 31.)

MUT-

II

 Data list

27 Power steering fluid pressure switch (Refer to P.13A-94.)

NG

Check the power steering fluid pressure switch system. (Refer
to P.13A-92, INSPECTION PROCEDURE 30.)

OK

OK

Check that air is sucked in the air intake system.



Broken intake manifold gasket



Damaged vacuum hose



Damaged air intake hose

NG

Repair

OK

MUT-

II

 Data list

11 Oxygen sensor (front)

OK: 0  – 400 mV and 600 – 1,000 mV alternates when the

engine is idling (wait for four minutes after the engine
started).

NG

Measure fuel high-pressure between the fuel pump (high pressure)
and injector. (Refer to P.13A-108.)

From the previous page

NOTE
*:

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