MPI <4G1> -
Troubleshooting
13A-49
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
Were the battery terminals disconnected?
Yes
After warming-up, let the engine run at idling for 10 minutes.
No
MUT-
II
Self-Diag code
Are diagnosis codes displayed?
Yes
Refer to P.13A-9, INSPECTION CHART FOR DIAGNOSIS
CODES.
No
Check the ISC servo for operation sound. (Refer to P.13A-88*.)
NG
Check the ISC system. (Refer to P.13A-36, INSPECTION PROCE-
DURE FOR DIAGNOSIS CODE P0505.)
OK
Check the injector for operation sound.
NG
Check the injector system. (Refer to P.13A-26, INSPECTION PRO-
CEDURE FOR DIAGNOSIS CODE P0201, P0202, P0203, P0204.)
OK
Does the engine stall right after the accelerator pedal is released?
Yes
Clean the throttle valve area. (Refer to P.13A-75*.)
No
Does the engine stall easily again?
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
Injector drive signal
D
Primary and secondary
ignition signal
D
Fuel pump drive signal
D
Engine ECU power supply
voltage
Yes
MUT-
II
Data list
14 Throttle position sensor (Refer to P.13A-65.)
NG
Check the throttle position sensor system. (Refer to P.13A-16, IN-
SPECTION PROCEDURE FOR DIAGNOSIS CODE P0120.)
OK
MUT-
II
Data list
13 Intake air temperature sensor (Refer to P.13A-65.)
NG
Check the intake air temperature sensor system.
(Refer to P.13A-12, INSPECTION PROCEDURE FOR DIAGNOSIS
CODE P0110.)
OK
MUT-
II
Data list
21 Engine coolant temperature sensor (Refer to P.13A-66.)
NG
Check the engine coolant temperature sensor system.
(Refer to P.13A-13, INSPECTION PROCEDURE FOR DIAGNOSIS
CODE P0115.)
OK
MUT-
II
Actuator test
10 EGR control solenoid valve (Refer to P.13A-70.)
NG
Check the EGR control solenoid valve system. (Refer to P.13A-32,
INSPECTION PROCEDURE FOR DIAGNOSIS CODE P0403.)
OK
MUT-
II
Data list
59 Oxygen sensor (rear)
D
Transmission: 2nd gear
D
Driving with throttle widely open
OK:
600 - 1,000 mV
NG
Check the oxygen sensor (rear) system. (Refer to P.13A-22, IN-
SPECTION PROCEDURE FOR DIAGNOSIS CODE P0136.)
OK
MUT-
II
Data list
11 Oxygen sensor (front)
OK:
600 - 1,000 mV during sudden racing
NG
Check the oxygen sensor (front) system. (Refer to P.13A-19, IN-
SPECTION PROCEDURE FOR DIAGNOSIS CODE P0130.)
OK
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