Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Toyota Echo 2000-2002 Approved techinfo.toyota.com ileaf 02toyrm 02toypdf 02rmsour 2002 02echorm di eg cip0300p

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                                                                                                                      DI-63
                                                  DIAGNOSTICS        -   ENGINE
                                                                                                                      DI6V8-05




    DTC                P0300                Random/Multiple Cylinder Misfire Detected


    DTC                P0301                Cylinder 1 Misfire Detected


    DTC                P0302                Cylinder 2 Misfire Detected


    DTC                P0303                Cylinder 3 Misfire Detected


    DTC                P0304                Cylinder 4 Misfire Detected

CIRCUIT DESCRIPTION
Misfire: The ECM uses the crankshaft position sensor and camshaft position sensor to monitor changes in
the crankshaft rotation for each cylinder.
The ECM counts the number of times the engine speed change rate indicates that misfire has occurred. And
when the misfire rate equals or exceeds the count indicating that the engine condition has deteriorated, the
MIL lights up.
If the misfire rate is high enough and the driving conditions will cause catalyst overheating, the MIL blinks
when misfiring occurs.

   DTC No.                      DTC Detecting Condition                                                Trouble Area
                                                                               S Open or short in engine wire
                                                                               S Connector connection
                                                                               S Vacuum hose connection
                                                                               S Ignition system
                                                                                  g        y
   P0300     Misfiring of random cylinders is detected during any particular   S Injector
   P0301     200 or 1,000 revolutions                                          S Fuel pressure
   P0302     For any particular 200 revolutions for the engine, misfiring is   S Manifold absolute pressure sensor
   P0303     detected which can cause catalyst overheating                     S Engine coolant temp. sensor
   P0304     (This causes MIL to blink)                                        S Compression pressure
                                                                               S Valve clearance
                                                                               S Valve timing
                                                                               S ECM
                                                                               S PCV piping
HINT:
When the 2 or more codes for a misfiring cylinder are recorded repeatedly but no random misfire code is
recorded, it indicates that the misfires were detected and recorded at different times.




 2002 ECHO (RM884U)

                                                                                Author :                    Date :    233
DI-64
                                                DIAGNOSTICS   -   ENGINE

WIRING DIAGRAM
                                     I10
          Instrument Panel J/B       Ignition      Instrument Panel J/B
                                     Switch
               7             1                        6          5
        W-R                                    B-R                    B-R
              1A            1O W-R                   1O         1O
                                 5   AM2   IG2 6

                                                                                                                ECM
         1                                                           1 IE2
              2                                                     B-R           I6 Injector No. 1
                                                                                                           12
                     Engine Room R/B                                        B-R                  B-O       E7 #10
              AM2                                                                 1            2
                                                                    B-R          I7 Injector No. 2         11
              1                                                              B-R                 B-Y       E7 #20
         1                                                                        1            2
                                                                    B-R          I8 Injector No. 3
                                                                             B-R                           25
   B-L                                                                                           B-W          #30
                                                                                                           E7
                                                                                  1            2
         F6 2                                                                    I9 Injector No. 4       24
                                                                             B-R                 B-L
                  Fusible Link                                                                           E7 #40
                                                                                  1            2
          MAIN    Block
                                                                                                         13
                                                                                               BR
                                                                                                         E7 E01

              Battery
                                                                                       EB



                                                                                                                      A09054



CONFIRMATION DRIVING PATTERN
(1) Connect the TOYOTA hand-held tester or OBD II scan tool.
(2) Record DTC and the freeze frame data.
(3) Use the TOYOTA hand-held tester to set to Check Mode. (See page DI-3 )
(4) Drive the vehicle several times with the engine speed, load and its surrounding range shown with
   ENGINE SPD, CALC LOAD in the freeze frame data or MISFIRE RPM, MISFIRE LOAD in the data list.
   If you have no TOYOTA hand-held tester, turn the ignition switch OFF after the symptom is simulated
    the first time. Then repeat the simulation process again.
HINT:
In order to memorize DTC of misfire, it is necessary to drive around MISFIRE RPM, MISFIRE LOAD in the
data list for the following period of time.
                     Engine Speed                                                       Time
                         Idling                                              3 minutes 30 seconds or more
                        1000 rpm                                                  3 minutes or more
                        2000 rpm                                             1 minute 30 seconds or more
                        3000 rpm                                                   1 minute or more
(5) Check whether there is misfire or not by monitoring DTC and the freeze frame data. After that, record
    them.
(6) Turn ignition switch OFF and wait at least 5 seconds.



2002 ECHO (RM884U)

                                                                           Author :                   Date :          234
                                                                                                           DI-65
                                           DIAGNOSTICS   -   ENGINE

INSPECTION PROCEDURE
HINT:
S       If is the case that DTC besides misfire is memorized simultaneously, first perform the troubleshooting
        for them.
S       Read freeze frame data using TOYOTA hand-held tester or OBD II scan tool. Because freeze frame
        data records the engine conditions when the malfunction is detected, when troubleshooting it is useful
        for determining whether the vehicle was running or stopped, the engine warmed up or not, the air-fuel
        ratio lean or rich, etc. at the time of the malfunction.
S       When the vehicle is brought to the workshop and the misfire is not occurred, misfire can be confirmed
        by reproducing the condition or freeze frame data. Also, after finishing the repair, confirm that there
        is no misfire. (See the confirmation driving pattern)
S       When either of SHORT FT #1, LONG FT #1, SHORT FT #2 or LONG FT #2 in the freeze frame data
        is besides the range of 



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