GDI ± Troubleshooting
13A-54
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.
D Malfunction of the electronic-controlled throttle valve
system
D Malfunction of the EGR valve
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
MUT-II Data list
26 Accelerator pedal position switch (Refer to P.13A-73.)
NG
Check the accelerator pedal position switch. (Refer to P.13A-65,
INSPECTION PROCEDURE 27.)
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
68 EGR valve (Refer to P.13A-74.)
NG
Check the EGR valve system. (Refer to P.13A-67, INSPECTION
PROCEDURE 29.)
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 Clean around the throttle valve (Refer to P.13A-92.)
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