MPI <4G9> -
Troubleshooting
13A-135
INSPECTION PROCEDURE 12
When the engine is hot, it stalls at idling. (Die out)
Probable cause
In such cases as the above, the cause is probably that ignition system, air/fuel mixture,
idle speed control (ISC) or compression pressure is defective.
In addition, if the engine suddenly stalls, the cause may also be a defective connector
contact.
D
Malfunction of the ignition system
D
Malfunction of air-fuel ratio control system
D
Malfunction of the ISC system
D
Drawing air into intake system
D
Improper connector contact
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NG
Check the oxygen sensor (rear) system. (Refer to P.13A-106, IN-
SPECTION PROCEDURE FOR DIAGNOSIS CODE P0136.)
OK
MUT-
II
Data list
59 Oxygen sensor (rear)
D
Transmission: 2nd gear <M/T>, L range <A/T>
D
Driving with throttle widely open
OK:
600 - 1,000 mV
NG
Check the EGR control solenoid valve system. (Refer to P.13A-117,
INSPECTION PROCEDURE FOR DIAGNOSIS CODE P0403.)
OK
MUT-
II
Actuator test
10 EGR control solenoid valve (Refer to P.13A-158.)
NG
Check the engine coolant temperature sensor system.
(Refer to P.13A-98, INSPECTION PROCEDURE FOR DIAGNOSIS
CODE P0115.)
OK
MUT-
II
Data list
21 Engine coolant temperature sensor (Refer to P.13A-154.)
NG
Check the barometric pressure sensor system. (Refer to P.13A-94,
INSPECTION PROCEDURE FOR DIAGNOSIS CODE P0105.)
OK
MUT-
II
Data list
25 Barometric pressure sensor (Refer to P.13A-155.)
NG
Check the intake air temperature sensor system. (Refer to P.13A-96,
INSPECTION PROCEDURE FOR DIAGNOSIS CODE P0110.)
OK
MUT-
II
Data list
13 Intake air temperature sensor (Refer to P.13A-153.)
No
While carrying out an intermittent malfunction simulation test (Refer
to GROUP 00 - Points to Note for Intermittent Malfunctions.), check
for sudden changes in the signals shown below.
D
Crank angle sensor signal
D
Air flow sensor signal
D
Injector drive signal
D
Primary and secondary
ignition signal
D
Fuel pump drive signal
D
Engine-ECU <M/T> or
engine-A/T-ECU
<A/T>
power supply voltage
No
Does the engine stall easily again?
Check and adjust the
fixed SAS.
(Refer to P.13A-76
*1
.)
Yes
Clean the throttle valve
area.
(Refer to P.13A-22
*2
.)
OK
Does the engine stall right after the accelerator pedal is released?
NG
Check theinjector system. (Refer to P.13A-110, INSPECTION PRO-
CEDURE FOR DIAGNOSIS CODE P0201, P0202, P0203, P0204.)
OK
Check the injector for operation sound.
NG
Check theISC system. (Refer to P.13A-120, INSPECTION PROCE-
DURE FOR DIAGNOSIS CODE P0505.)
No
Check the ISC servo for operation sound. (Refer to P.13A-26
*2
.)
Yes
Refer to P.13A-90, INSPECTION CHART FOR DIAGNOSIS
CODES.
No
MUT-
II
Self-Diag code
Are diagnosis codes displayed?
Were the battery terminals disconnected?
Yes
After warming-up, let the engine run at idling for 10 minutes.
OK