Mitsubishi Pajero Pinin. Manual — part 82
GDI –
Troubleshooting
13A-77
INSPECTION PROCEDURE 11
The engine stalls when starting the car. (Pass out)
Probable cause
The cause is probably poor ignition due to a malfunctioning spark plug (weak spark),
or an incorrect air/fuel ratio when the accelerator is depressed.
Malfunction of the ignition system
Malfunction of the EGR valve
Air stuck in the air intake system
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.)
No
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
Self-Diag code
Is a diagnosis code displayed?
Yes
(Refer to P.13A-12, INSPECTION CHART FOR DIAGNOSIS
CODES.)
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:
(1) Spark plug
(2) Check if air is stuck in the air intake system.
Damage intake manifold gasket
Damaged or disconnected vacuum hose
Damaged air intake hose
GDI –
Troubleshooting
13A-78
INSPECTION PROCEDURE 12
The engine stalls when decelerating.
Probable cause
The cause is probably an improper air/fuel ratio due to a faulty EGR system, or
poor intake air volume due to a faulty electronic-controlled throttle valve system.
Malfunction of the electronic-controlled throttle valve
system
Malfunction of the EGR valve
OK
Check all the following items:
Spark plug
Clean around the throttle valve (Refer to P.13A-92*.)
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
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
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
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.)
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.
NOTE
*:
Refer to the ’00 PAJERO PININ Workshop Manual (Pub. No. CKRE00E1)
GDI –
Troubleshooting
13A-79
INSPECTION PROCEDURE 13
Hesitation, sag, stumble, poor acceleration or surge
Probable cause
The cause is probably a malfunction of the ignition system, electronic-controlled
throttle valve system, compression pressure, etc.
Malfunction of the ignition system
Malfunction of the air/fuel ratio control system
Malfunction of the electronic-controlled throttle valve
system
Improper compression pressure
Air stuck in the air intake system
OK
To the next page
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.)
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
Check that air is sucked in the air intake system.
Broken intake manifold gasket
Damaged vacuum hose
Damaged air intake hose
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
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
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
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. (Refer to P.13A-16, IN-
SPECTION 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. (Refer to P.13A-18, IN-
SPECTION PROCEDURE FOR DIAGNOSIS CODE P0110.)
OK
NG
Check the accelerator pedal position switch.
(Refer to P.13A-90, INSPECTION PROCEDURE 28.)
MUT-
II
Data list
26 Accelerator pedal position switch (Refer to P.13A-94.)
No
Check ignition timing. (Refer to GROUP 11A – Engine Adjustment.)
NG
Check that the crank angle sensor and timing belt cover are proper-
ly installed.
MUT-
II
Self-Diag code
Is a diagnosis code displayed?
Yes
(Refer to P.13A-12, INSPECTION CHART FOR DIAGNOSIS
CODES.)
GDI –
Troubleshooting
13A-80
NG
Replace the injector.
OK
Check all the following items:
Spark plug
EGR system
Compression pressure
Clogged fuel filter, fuel line
Check trouble symptom.
OK
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
Measure high fuel pressure between the fuel pump (high pressure)
and injector. (Refer to P.13A-108.)
NG
Repair
From the previous page
INSPECTION PROCEDURE 14
The feeling of impact when accelerating
Probable cause
The cause is probably an ignition leak being generated in line with an increase
in the spark plug request voltage during acceleration.
Malfunction of the ignition system
NG
Replace the ignition coil.
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.
OK
Check all the following items:
Spark plug
Ignition current leak
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.)
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