Mitsubishi Pajero Pinin. Manual - part 81

GDI  – 

Troubleshooting

13A-73

INSPECTION PROCEDURE 8

Idle speed is high or low (Improper idling)

Probable cause

The cause is probably that the intake air amount during idling is too great or too
small.



Malfunction of the electronic-controlled throttle valve
system



Malfunction of the throttle body

OK



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



Adjust the throttle position sensor. (Refer to P.13A-92*.)

MUT-

II

 Data list

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

NG

Check the stop lamp switch system. 
(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.)

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

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.)

OK

MUT-

II

 Actuator test

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

NG

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

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.)

MUT-

II

 Self-Diag code

Is a diagnosis code displayed?

Yes

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

NOTE
*:

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

GDI  – 

Troubleshooting

13A-74

INSPECTION PROCEDURE 9

When the engine is cold, it stalls at idling. (Die out)

Probable cause

The cause is probably an incorrect air/fuel ratio or poor intake air amount when
the engine is cold.



Malfunction of the electronic-control throttle valve
system



Malfunction of the throttle body

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

NG

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

No

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

NG

Repair

OK

Does the engine stall immediately after the accelerator pedal is
released?

Yes

Clean around the throttle valve. 
(Refer to P.13A-91*.)

OK

MUT-

II

 Data list

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

NG

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

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

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

NG

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

No

MUT-

II

 Data list

22 Crank angle sensor (Refer to P.13A-94.)

Check idling speed when the engine is cold.

NG

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

No

Is the engine idling correct after the engine has been warmed up?

Yes

Refer to “Unstable idling (rough idle, hunting). 
(Refer to P.13A-71, INSPECTION PROCEDURE 7.)

No

MUT-

II

 Self-Diag code

Is a diagnosis code displayed?

Yes

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

Have the battery terminals been disconnected recently?

Yes

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

OK

Check all the following items:



Spark plugs



Compression pressure



Engine oil viscosity

Check trouble symptom.

OK

NOTE
*:

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

GDI  – 

Troubleshooting

13A-75

INSPECTION PROCEDURE 10

When the engine is hot, it stalls at idling. (Die out)

Probable cause

The cause is probably an improper air/fuel ratio, faulty electronic-controlled throttle
valve system, compression pressure. In addition, if the engine stalls suddenly, another
possible cause might be a poor connector contact.



Malfunction of the ignition system



Malfunction of air/fuel ratio control system



Malfunction of electronic-controlled throttle valve
system



Malfunction of the throttle body



Poor connector contact



Improper compression pressure



Air stuck in the air intake system

OK

Check that air is sucked in the air intake system.



Broken intake manifold gasket



Damaged vacuum hose



Damaged air intake hose

OK

To the next page

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.)

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

 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.)

Yes

MUT-

II

 Data list

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

NG

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

OK

Is it easy to reproduce the engine stall?

No

While carrying out an intermittent malfunction simulation test. (Re-
fer to GROUP 00 – Points to Note for Intermittent Malfunction.),
check for sudden changes in the following signals.



Crank angle sensor signal



Injector drive signal



Fuel pump (low pressure) drive signal



Air flow sensor



Primary ignition signal



Power supply to the engine-ECU

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

MUT-

II

 Self-Diag code

Is a diagnosis code displayed?

Yes

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

NG

Repair

Have the battery terminals been disconnected recently?

Yes

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

OK

MUT-

II

 Data list

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

NG

Check the intake air temperature sensor. (Refer to P.13A-18, IN-
SPECTION PROCEDURE FOR DIAGNOSIS CODE P0110.)

OK

MUT-

II

 Data list

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

NG

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

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.)

GDI  – 

Troubleshooting

13A-76

OK

Check all the following items:



Spark plugs



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.

No

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

Yes

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

Does the engine stall immediately after the accelerator pedal is
released?

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.)

MUT-

II

 Data list

34 Air flow sensor reset signal (Refer to P.13A-94.)

NG

Check the air flow sensor system. (Refer to P.13A-14, INSPEC-
TION PROCEDURE FOR DIAGNOSIS CODE P0100.)

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, INSPECTION PROCEDURE 33.)

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.)

OK

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.)

From the previous page

NOTE
*:

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