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                                                                                                                           DI-1 13
                                                 DIAGNOSTICS   -   ENGINE
                                                                                                                            DI6VI-04




     DTC               P1300               Igniter Circuit Malfunction (No.1)


     DTC               P1305               Igniter Circuit Malfunction (No.2)


     DTC               P1310               Igniter Circuit Malfunction (No.3)


     DTC               P1315               Igniter Circuit Malfunction (No.4)

CIRCUIT DESCRIPTION
A DIS (Direct Ignition System) has been adopted. The DIS improves the ignition timing accuracy, reduces
high-voltage loss, and enhances the the overall reliability of the ignition system by eliminating the distributor.
The DIS is a 1-cylinder ignition system which ignites one cylinder with one ignition coil. In the 1-cylinder
ignition system, the one spark plug is connected to the end of the secondary winding. High voltage generated
in the secondary winding is applied directly to the spark plug. The spark of the spark plug pass from the center
elecrtode to the ground electrode.
The ECM determines ignition timing and outputs the ignition signals (IGT) for each cylinder. Based on IGT
signals, the power transistors in the igniter cuts off the current to the primary coil in the ignition coil is supplied
to the spark plug that are connected to the end of the secondary coil. At the same time, the igniter also sends
an ignition confirmation signal (IGF) as a fail-safe measure to the ECM.

   DTC No.                      DTC Detecting Condition                                         Trouble Area
                                                                       S Ignition system
    P1300
                                                                       S Open or short in IGF1 and IGT1 - 4 circuit from
    P1305
              No IGF signal to ECM while engine is running               ignition coil with igniter
    P1310
                                                                       S No.1 - No.4 ignition coil with igniter
    P1315
                                                                       S ECM




 2002 ECHO (RM884U)

                                                                        Author :                     Date :                 283
DI-1 14
                                                DIAGNOSTICS      -       ENGINE

WIRING DIAGRAM

                                       I10          Instrument Panel
                  Instrument Panel
                                       Ignition     J/B
                  J/B
                                       Switch
                    7          1                      6           3 B-R 11
                                   W-R          B-R                                                                      ECM
                   1A         1O                     1O          1A     EB1
                                     5 AM2 IG2 6
                                                                                                                               5V
   W-R                                            B-R                          B-R
                                                           B-R
                                                                     1
                                          I2                                                               22
                                                                                             G-R
                                      B-R Ignition Coil                                                    E7
                                                                                      3                           IGT1
          1                               and Igniter                                                       3
                                                                                             Y         Y
                                          No. 1                                                            E7
                                                                                     2                            IGF
              2    Engine                         B-R                      4         W-B
                                                                                                  Y
               AM2 Room                                              1
                   R/B No. 1              I3                                                               21
                                                                                                G-B        E7 IGT2
              1                           Ignition Coil                           3
                                      B-R and Igniter
          1                               No. 2                                    2
                                                                                        Y
                                                  B-R                      4        W-B
                                                                                                   Y
                                                                     1                                     20
                                B-R        I4                                                G-O
    B-L                                    Ignition Coil                                                   E7 IGT3
                                                                                  3          Y
                                           and Igniter
                                           No. 3
                                                                                   2
          F6 2                                                             4        W-B
                                                 B-R
                     Fusible Link                                    1
              MAIN                        I5                                                               19
                     Block                                                                   G-Y
                                          Ignition Coil                                                    E7 IGT4
                                                                                  3
                                      1   and Igniter                                        Y
                            N1            No. 4
                            Noise                                                  2
                            Filter                                         4       W-B
                                                                                     W-B
                  Battery
                                                                                           EB



                                                                                                                                    A09059




 2002 ECHO (RM884U)

                                                                                  Author :                      Date :              284
                                                                                                      DI-1 15
                                          DIAGNOSTICS   -   ENGINE

INSPECTION PROCEDURE
HINT:
S       If DTC P1300 is displayed, check No.1 ignition coil with igniter circuit.
S       If DTC P1305 is displayed, check No.2 ignition coil with igniter circuit.
S       If DTC P1310 is displayed, check No.3 ignition coil with igniter circuit.
S       If DTC P1315 is displayed, check No.4 ignition coil with igniter circuit.
S       Read freeze frame data using TOYOTA hand-held tester or OBD II scan tool. Because freeze frame
        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.


    1      Check spark plug and spark (See page DI-63 ).


                                                  NG        Go to step 4.


    OK



    2      Check for open and short in harness and connector in IGF and IGT signal circuit
           between ECM and ignition coil with igniter (See page IN-29 ).


                                                  NG        Repair or replace harness or connector.


    OK



    3      Disconnect ignition coil with igniter connector and check voltage between
           terminals IGF of ECM connector and body ground.

         ON          IGF                        PREPARATION:
                                                (a) Remove the connector cover from the ECM.
                                                (b) Disconnect the ignition coil with igniter connector.
                                                (c) Turn the ignition switch ON.
                                                CHECK:
                                                Measure voltage between terminals IGF of the ECM connector
                    (+)      (-)                and body ground.
                                                OK:
                                       A09043        Voltage: 4.5 - 5.5 V

                                                  OK        Replace ignition coil with igniter.


    NG

2002 ECHO (RM884U)

                                                                  Author :            Date :           285
DI-1 16
                                                  DIAGNOSTICS   -   ENGINE


  Check and replace ECM (See page IN-29 ).



   4       Check for open and short in harness and connector in IGT signal circuit between
           ECM and ignition coil with igniter (See page IN-29 ).


                                                         NG         Repair or replace harness or connector.


   OK




   5       Check voltage between terminals IGT1 - 4 of ECM connector and body ground.

                                                       PREPARATION:
          ON
            IGT1 IGT2 IGT3          IGT4               Remove the connector cover from the ECM.
                                                       CHECK:
                                                       Measure voltage between terminals IGT1 - 4 of the ECM con-
                                                       nector and body ground when engine is cranked.
                                                       OK:
                      (+)          (-)                      Voltage: More than 0.1 V and less than 4.5 V

                                              A09044




            IGT signal waveform                        Reference: INSPECTION USING OSCILLOSCOPE
                                           5 V/
                                           Division    During cranking or idling, check waveform between terminals
                                                       IGT1 - 4 and E1 of the ECM connector.
   IGT                                                 HINT:
                                           GND         Correct waveform appears as sohwn, with rectangle waves.
                                           GND
    IGF
                                                         NG         Check and replace ECM (See page IN-29 ).
             20 m sec./ Division              A06097




   OK




 2002 ECHO (RM884U)

                                                                             Author :        Date :            286
                                                                                                           DI-1 17
                                             DIAGNOSTICS   -   ENGINE



  6        Disconnect ignition coil with igniter connector and check voltage between termi-
           nals IGT1 - 4 of ECM connector and body ground.

                                                   PREPARATION:
       ON
         IGT1 IGT2 IGT3            IGT4            (a) Remove the connector cover from the ECM.
                                                   (b) Disconnect the ignition coil with igniter connector.
                                                   CHECK:
                                                   Measure voltage between terminals IGT1 - 4 of the ECM con-
                                                   nector and body ground when engine is cranked.
                      (+)         (-)              OK:
                                                        Voltage: More than 0.1 V and less than 4.5 V
                                          A09044



                                                     NG        Check and replace ECM (See page IN-29 ).


  OK



  7        Check ignition coil with igniter power source circuit.

                                                   PREPARATION:
                1                                  Disconnect the ignition coil with igniter connector.
                                                   CHECK:
                                                   Measure voltage between terminal 1 of ignition coil with igniter
      ON                                           connector and body ground, when ignition switch is turned to
                    (+)     (-)                    "ON" and "START" position.
  START                                            OK:
                                                        Voltage: 9 - 14 V
                                          A09045

                                                     NG        Repair ignition coil with igniter power source-
                                                               circuit.


  OK



  8        Check for open and short in harness and connector between ignition switch and
           ignition coil with igniter (See page IN-29 ).


                                                     NG        Repair or replace harness or connector.


  OK




2002 ECHO (RM884U)

                                                                     Author :            Date :              287
DI-1 18
                                        DIAGNOSTICS   -   ENGINE



   9      Check EFI main relay (Marking: EFI) (See page SF-47 ).


                                              NG          Replace EFI main relay (marking: EFI).


   OK



  Replace ignition coil with igniter.




 2002 ECHO (RM884U)

                                                                   Author :        Date :          288



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