SFI SYSTEM(w/o Canister Pump Module) Ignition Circuit

DESCRIPTION

A direct ignition system is used on this vehicle. The direct ignition system is a 1 cylinder ignition system which ignites one cylinder with one ignition coil. In the 1 cylinder ignition system, one spark plug is connected to the end of the secondary winding. High voltage is generated in the secondary winding and is applied directly to the spark plug. The spark of the spark plug passes from the center electrode to the ground electrode.

The ECM determines the ignition timing and transmits the ignition signals for each cylinder. Using the ignition signal, the ECM turns on and off the power transistor inside the igniter, which switches on and off a current to the primary coil. When the current to the primary coil is cut off, high voltage is generated in the secondary coil and this voltage is applied to the spark plugs to create sparks inside the cylinders.

WIRING DIAGRAM

B006AH1E01

CAUTION / NOTICE / HINT

Note

Inspect the fuses for circuits related to this system before performing the following procedure.

Tech Tips

Perform a spark test first. If none of the cylinders spark, or if only some cylinders do not spark, check this circuit to determine if the ignition coil and spark plug are normal.

Click here

PROCEDURE


  1. CHECK TERMINAL VOLTAGE (POWER SOURCE OF IGNITION COIL ASSEMBLY)


    1. Disconnect the ignition coil assembly connectors.

    2. Turn the engine switch on (IG).

    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Condition Specified Condition
      F1-1 (+B) - F1-3 (GND) Engine switch on (IG) 11 to 14 V
      F4-1 (+B) - F4-3 (GND) Engine switch on (IG) 11 to 14 V
      F2-1 (+B) - F2-3 (GND) Engine switch on (IG) 11 to 14 V
      F5-1 (+B) - F5-3 (GND) Engine switch on (IG) 11 to 14 V
      D4-1 (+B) - D4-3 (GND) Engine switch on (IG) 11 to 14 V
      D5-1 (+B) - D5-3 (GND) Engine switch on (IG) 11 to 14 V
      Result
      Proceed to
      OK
      NG

    NG

    CHECK HARNESS AND CONNECTOR (IGNITION COIL ASSEMBLY - BODY GROUND) Click here

    OK

  2. CHECK HARNESS AND CONNECTOR (IGNITION COIL ASSEMBLY - ECM)


    1. Disconnect the ignition coil assembly connectors.

    2. Disconnect the ECM connector.

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      F1-2 (IGT1) - D1-61 (IGT1) Always Below 1 Ω
      F4-2 (IGT2) - D1-60 (IGT2) Always Below 1 Ω
      F2-2 (IGT3) - D1-59 (IGT3) Always Below 1 Ω
      F5-2 (IGT4) - D1-58 (IGT4) Always Below 1 Ω
      D4-2 (IGT5) - D1-57 (IGT5) Always Below 1 Ω
      D5-2 (IGT6) - D1-56 (IGT6) Always Below 1 Ω
      F1-2 (IGT1) or D1-61 (IGT1) - Body ground and other terminals Always 10 kΩ or higher
      F4-2 (IGT2) or D1-60 (IGT2) - Body ground and other terminals Always 10 kΩ or higher
      F2-2 (IGT3) or D1-59 (IGT3) - Body ground and other terminals Always 10 kΩ or higher
      F5-2 (IGT4) or D1-58 (IGT4) - Body ground and other terminals Always 10 kΩ or higher
      D4-2 (IGT5) or D1-57 (IGT5) - Body ground and other terminals Always 10 kΩ or higher
      D5-2 (IGT6) or D1-56 (IGT6) - Body ground and other terminals Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE ECM Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  3. CHECK HARNESS AND CONNECTOR (IGNITION COIL ASSEMBLY - BODY GROUND)


    1. Disconnect the ignition coil assembly connectors.

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      F1-3 (GND) - Body ground Always Below 1 Ω
      F4-3 (GND) - Body ground Always Below 1 Ω
      F2-3 (GND) - Body ground Always Below 1 Ω
      F5-3 (GND) - Body ground Always Below 1 Ω
      D4-3 (GND) - Body ground Always Below 1 Ω
      D5-3 (GND) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. CHECK HARNESS AND CONNECTOR (IG2 RELAY - IGNITION COIL ASSEMBLY)


    1. Disconnect the IG2 relay from the No. 1 engine room relay block and junction block assembly.

    2. Disconnect the ignition coil assembly connectors.

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      5 (IG2 relay) - F1-1 (+B) Always Below 1 Ω
      5 (IG2 relay) - F4-1 (+B) Always Below 1 Ω
      5 (IG2 relay) - F2-1 (+B) Always Below 1 Ω
      5 (IG2 relay) - F5-1 (+B) Always Below 1 Ω
      5 (IG2 relay) - D4-1 (+B) Always Below 1 Ω
      5 (IG2 relay) - D5-1 (+B) Always Below 1 Ω
      5 (IG2 relay) or F1-1 (+B) - Body ground and other terminals Always 10 kΩ or higher
      5 (IG2 relay) or F4-1 (+B) - Body ground and other terminals Always 10 kΩ or higher
      5 (IG2 relay) or F2-1 (+B) - Body ground and other terminals Always 10 kΩ or higher
      5 (IG2 relay) or F5-1 (+B) - Body ground and other terminals Always 10 kΩ or higher
      5 (IG2 relay) or D4-1 (+B) - Body ground and other terminals Always 10 kΩ or higher
      5 (IG2 relay) or D5-1 (+B) - Body ground and other terminals Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. INSPECT IG2 RELAY


    1. Inspect the IG2 relay.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE IG2 RELAY

    OK

  6. CHECK HARNESS AND CONNECTOR (POWER SOURCE OF IG2 RELAY)


    1. Remove the IG2 relay from the No. 1 engine room relay block and junction block assembly.

      B006ETRC01
      *A for LHD *B for RHD
      *1 No. 1 Engine Room Relay Block and Junction Block Assembly *2 IG2 Relay

    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Condition Specified Condition
      3 (IG2 relay) - Body ground Always 11 to 14 V
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (BATTERY - IG2 RELAY)

    OK

  7. CHECK HARNESS AND CONNECTOR (IG2 RELAY - BODY GROUND)


    1. Remove the IG2 relay from the No. 1 engine room relay block and junction block assembly.

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      2 (IG2 relay) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    OK

    GO TO ENTRY AND START SYSTEM (FOR START FUNCTION) Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR