MPI <4G1> -
Troubleshooting
13A-27
Code No. P0300 Random cylinder misfire detected
Probable cause
Range of Check
D
Engine speed is approx. 50 - 4,500 r/min.
D
When the engine is running except deceleration and sudden acceleration.
Set Conditions
D
The number of misfires exceeds a predetermined number per 200 engine
revolutions.
D
The number of misfires exceeds a predetermined number per 1,000 engine
revolutions.
D
Malfunction of the ignition system
D
Abnormal compression
D
Malfunction of injector
D
Abnormal signal from the crank angle sensor
D
Malfunction of the lambda control system
D
Malfunction of the engine coolant temperature
sensor
D
Missing timing belt teeth
D
Malfunction of the EGR valve
D
Malfunction of engine-ECU
OK
Check the following items:
D
Check the ignition coil, spark pugs, spark plug cables.
D
Check the compression pressure.
D
Check the timing belt for jumping teeth.
D
Check the EGR system and EGR valve.
OK
MUT-II Data list
21 Engine coolant temperature sensor (Refer to P.13A-66.)
Check the engine coolant temperature sensor system.
(Refer to P.13A-13, INSPECTION PROCEDURE FOR
DIAGNOSTIC TROUBLE CODE P0115.)
NG
NG
Check the abnormal fuel system.
(Refer to P.13A-25, INSPECTION PROCEDURE FOR
DIAGNOSTIC TROUBLE CODE P0170.)
NG
OK
MUT-II Data list
82 Short-term fuel compensation (Refer to P.13A-69.)
OK
MUT-II Data list
81 Long-term fuel compensation (Refer to P.13A-69.)
OK
Check the harness wire between the engine-ECU and the
injector connector
NG
Repair
OK
Check the following connectors:
A-74, A-75, A-76, A-80, B-37
NG
Repair
OK
Check the injector (Refer to P.13A-86*.)
NG
Replace
MUT-
II
Data list
22 Crankshaft position sensor (Refer to P.13A-66.)
D
Crankshaft position sensor waveform check
D
Engine speed: stable
OK:
Constant pulse range
NG
Check the crankshaft position sensor system.
(Refer to P.13A-29, INSPECTION PROCEDURE FOR
DIAGNOSIS CODE P0335.)
NOTE:
*: Refer to the ’96 COLT/LANCER Workshop Manual (Pub. No. PWME9511).