1A-71 Engine General Information and Diagnosis:
DTC P0300 / P0301 / P0302 / P0303 / P0304: Random Misfire Detected (Misfire Detected at 2 or More
Cylinders) / Cylinder 1 / Cylinder 2 / Cylinder 3 / Cylinder 4 Misfire Detected
S3RH0A1104036
Wiring Diagram
System Description
ECM monitors crankshaft revolution speed and engine speed via the crankshaft position sensor and cylinder No. via
the camshaft position sensor. Then it calculates the change in the crankshaft revolution speed and from how many
times such change occurred in every 200 or 1000 engine revolutions, it detects occurrence of misfire.
When ECM detects a misfire (misfire rate per 200 revolutions) which can cause overheat and damage to the three way
catalytic converter, it makes the malfunction indicator lamp (MIL) flash as long as misfire occurs at that rate.
After that, however, when the misfire rate drops, MIL remains ON until it is judged as normal 3 times under the same
driving conditions.
Also, when ECM detects a misfire (misfire rate per 1000 revolutions) which will not cause damage to three way
catalytic converter but can cause exhaust emission to be deteriorated, it makes MIL light according to the 2 driving
cycle detection logic.
11
Check PCV valve for performance
1) See “PCV Valve Inspection in Section 1B”.
Is it in good condition?
Substitute a known-
good ECM and recheck.
Replace PCV valve.
Step
Action
Yes
No
C41-20
C41-19
ECM
IG1
GRN/YEL
BLK/WHT
GRN/WHT
IG1
2
+B
C41-9
C41-21
C41-8
C41-23
C41-31
BLU/YEL
BLU/WHT
BLU/RED
BLU/GRN
5V
C41-11
YEL/BLK
5V
BLK/RED
3
4
5
5
1
5V
5V
BLU
I2RH0B110043-01
1. Ignition coil No. 1
4. CMP sensor
2. Ignition coil No. 2
5. Fuel injector
3. CKP sensor
Summary of Contents for Liana RH413
Page 2: ......
Page 4: ......
Page 6: ......
Page 336: ...1K 4 Exhaust System...
Page 456: ...3D 4 Propeller Shafts...
Page 553: ...Automatic Transmission Transaxle 5A 5 4WD I3RH0A510002 01 1 Transfer...
Page 1044: ...8B 119 Air Bag System...
Page 1049: ...Table of Contents 9 v Roof Molding Components 9M 1 Splash Guard If Equipped Components 9M 2...
Page 1278: ...9M 3 Exterior Trim...
Page 1300: ...Prepared by 1st Ed Nov 2003 2nd Ed Feb 2007...
Page 1301: ...19 mm 99500 54G10 01E 99500 54G10 01E SERVICE MANUAL VOLUME 1 OF 2 SERVICE MANUAL VOL 1 OF 2...
Page 1302: ...27 mm 99500 54G10 01E 99500 54G10 01E SERVICE MANUAL VOLUME 2 OF 2 SERVICE MANUAL VOL 2 OF 2...