Mitsubishi Pajero Pinin. Manual - part 45

GDI – 

Troubleshooting

13A-46

From the previous page

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:

D

Spark plug

D

Compression pressure

D

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

Check trouble symptom.

OK

NG

Replace the injector.

GDI – 

Troubleshooting

13A-47

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.

D

Malfunction of the ignition system

D

Malfunction of the air/fuel ratio control system

D

Malfunction of the electronic-control throttle valve
system

D

Improper compression pressure

D

Air sucking into the air intake system

Has the battery been disconnected recently?

Yes

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

No

MUT-

II

 Self-Diag code

Is a diagnosis code displayed?

Yes

Refer to P.13A-14, INSPECTION CHART FOR DIAGNOSIS
CODES.

No

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

Yes

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

No

MUT-

II

 Data list

14 Throttle position sensor (2nd channel) (Refer to P.13A-72.)

NG

Check the throttle position sensor (2nd channel) system. (Refer
to P.13A-18, INSPECTION PROCEDURE FOR DIAGNOSIS
CODE 14.)

OK

MUT-

II

 Data list

79 Throttle position sensor (1st channel) (Refer to P.13A-75.)

NG

Check the throttle valve position feedback system. (Refer to
P.13A-37, INSPECTION PROCEDURE FOR DIAGNOSIS CODE
92.)

OK

MUT-

II

 Data list

26 Accelerator pedal position switch (Refer to P.13A-73.)

NG

Check the accelerator pedal position switch system. (Refer to
P.13A-65, INSPECTION PROCEDURE 27.)

OK

MUT-

II

 Data list

13 Intake air temperature sensor (Refer to P.13A-71.)

NG

Check the intake air temperature sensor system. (Refer to
P.13A-17, INSPECTION PROCEDURE FOR DIAGNOSIS CODE
13.)

OK

MUT-

II

 Data list

25 Barometric pressure sensor (Refer to P.13A-73.)

NG

Check the barometric pressure sensor system. (Refer to P.13A-23,
INSPECTION PROCEDURE FOR DIAGNOSIS CODE 25.)

OK

MUT-

II

 Data list

21 Engine coolant temperature sensor (Refer to P.13A-72.)

NG

Check the engine coolant temperature sensor. (Refer to P.13A-19,
INSPECTION PROCEDURE FOR DIAGNOSIS CODE 21.)

OK

MUT-

II

 Actuator test

08 Purge control solenoid valve (Refer to P.13A-76.)

NG

Check the purge control solenoid valve system. (Refer to P.13A-68,
INSPECTION PROCEDURE 30.)

MUT-

II

 Data list

11 Oxygen sensor

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

NG

Check the oxygen sensor system. (Refer to P.13A-15, INSPEC-
TION PROCEDURE FOR DIAGNOSIS CODE 11.)

OK

OK

To the next page

GDI – 

Troubleshooting

13A-48

OK

Check that air is sucked in the air intake system.

D

Broken intake manifold gasket

D

Damaged vacuum hose

D

Damaged air intake hose

From the previous page

OK

MUT-

II

 Data list

27 Power steering fluid pressure switch (Refer to P.13A-73.)

NG

Check the power steering fluid pressure switch system. (Refer
to P.13A-69, INSPECTION PROCEDURE 31.)

OK

MUT-

II

 Data list

28 A/C switch (Refer to P.13A-73.)

NG

Check the A/C switch and A/C relay system. (Refer to P.13A-69,
INSPECTION PROCEDURE 32.)

OK

MUT-

II

 Data list

67 Stop lamp switch (Refer to P.13A-74.)

NG

Check the stop lamp switch. (Refer to P.13A-70, INSPECTION
PROCEDURE 33.)

OK

MUT-

II

 Data list

31 Small lamp switch (Refer to P.13A-73.)

NG

Check the small lamp switch system. (Refer to P.13A-70, INSPEC-
TION PROCEDURE 34.)

OK

MUT-

II

 Data list

68 EGR valve (Refer to P.13A-74.)

NG

Check the EGR valve. (Refer to P.13A-67, INSPECTION PROCE-
DURE 29.)

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.

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 trouble symptom.

NG

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.

D

Damaged intake manifold gasket

D

Damaged air intake hose

D

Damaged vacuum hose

D

Faulty EGR valve seat

OK

MUT-

II

 Data list

11 Oxygen sensor

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

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

NG

NG

Repair

OK

MUT-

II

 Data list

29 Inhibitor switch (Refer to P.13A-73.)

NG

Check the ignition switch-ST and inhibitor switch. <A/T> (Refer
to P.13A-64, INSPECTION PROCEDURE 26.)

Measure fuel high-pressure between the fuel pump (high pressure)
and injector. (Refer to P.13A-97.)

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

GDI – 

Troubleshooting

13A-49

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.

D

Malfunction of the electronic-controlled throttle valve
system

D

Malfunction of the throttle body

MUT-

II

 Self-Diag code

Is a diagnosis code displayed?

Yes

Refer to P.13A-14, INSPECTION CHART FOR DIAGNOSIS
CODES.

No

MUT-

II

 Data list

14 Throttle position sensor (2nd channel) (Refer to P.13A-72.)

NG

Check the throttle position sensor (2nd channel). (Refer to
P.13A-18, INSPECTION PROCEDURE FOR DIAGNOSIS CODE
14.)

OK

MUT-

II

 Actuator test

08 Purge control solenoid valve (Refer to P.13A-76.)

NG

Check the purge control solenoid valve. (Refer to P.13A-68, IN-
SPECTION PROCEDURE 30.)

OK

MUT-

II

 Data list

26 Accelerator pedal position switch (Refer to P.13A-73.)

NG

Check the accelerator pedal position switch system. (Refer to
P.13A-65, INSPECTION PROCEDURE 27.)

OK

MUT-

II

 Data list

21 Engine coolant temperature sensor (Refer to P.13A-72.)

NG

Check the engine coolant temperature sensor. (Refer to P.13A-19,
INSPECTION PROCEDURE FOR DIAGNOSIS CODE 21.)

OK

MUT-

II

 Data list

28 A/C switch (Refer to P.13A-73.)

NG

Check the A/C switch and A/C relay system. (Refer to P.13A-69,
INSPECTION PROCEDURE 32.)

OK

OK

MUT-

II

 Data list

67 Stop lamp switch (Refer to P.13A-74.)

NG

Check the stop lamp switch system. (Refer to P.13A-70, INSPEC-
TION PROCEDURE 33.)

OK

D

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

D

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

MUT-

II

 Data list

29 Inhibitor switch (Refer to P.13A-73.)

Check the ignition switch-ST and inhibitor switch <A/T>. (Refer
to P.13A-64, INSPECTION PROCEDURE 26.)

NG