Mitsubishi Pajero Pinin 1999 - Page 122

GDI ± Troubleshooting
13A-50
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.
D Malfunction of the electronic-control throttle valve
system
D Malfunction of the throttle body
Have the battery terminals 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
Is the engine idling correct after the engine has been warmed
up?
Yes
Refer to ªUnstable idling (rough idle, hunting).º (Refer to P.13A-47,
INSPECTION PROCEDURE 7.)
No
MUT-II Data list
22 Crank angle sensor (Refer to P.13A-72.)
Check idling speed when the engine is cold.
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 position switch. (Refer to P.13A-65, IN-
SPECTION 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
68 EGR valve (Refer to P.13A-74.)
NG
Check the EGR valve system. (Refer to P.13A-67, INSPECTION
PROCEDURE 29.)
OK
Does the engine stall immediately after the accelerator pedal is
released?
Yes
Clean around the throttle valve. (Refer to P.13A-92.)
No
Measure fuel high pressure between the fuel pump (high pressure)
and injector. (Refer to P.13A-97.)
NG
Repair
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 all the following items:
D Spark plugs
D Compression pressure
D Engine oil viscosity
NG
Check trouble symptom.
OK
Replace the injector.