LEMON Manuals: Even more car manuals for everyone
Home >> Toyota >> 2006 >> Prius >> Repair and Diagnosis >> Engine Performance >> Engine Control System (1NZ-FXE) >> SFI System >> DTC P0351 Ignition Coil "A" Primary / Secondary Circuit; DTC P0352 Ignition Coil "B" Primary / Secondary Circuit; DTC P0353 Ignition Coil "C" Primary / Secondary Circuit; DTC P0354 Ignition Coil "D" Primary / Secondary Circuit >> Inspection Procedure

Inspection Procedure

HINT:

Read freeze frame data using the intelligent tester. Freeze frame data records the engine condition when malfunction is detected. When troubleshooting, freeze frame data can help determine if the vehicle was running or stopped, if the engine was warmed up or not, if the air-fuel ratio was lean or rich, and other data from the time the malfunction occurred.

  1. CHECK SPARK PLUG AND SPARK OF MISFIRING CYLINDER 

    OK : Spark occurs. 

    NG : Go to step   4 

    OK : GO TO NEXT STEP 

  2. CHECK HARNESS AND CONNECTOR (IGNITION COIL - ECM (IGF SIGNAL TERMINAL)) 
    1. Disconnect the I1, I2, I3 or I4 ignition coil and igniter connector.
      Fig 1: Identifying Ignition Coil Connector
      G04471988Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the E4 ECM connector.
    3. Measure the resistance between the wire harness side connectors.

      Standard resistance (Check for open) 

      TESTER CONNECTION AND SPECIFIED CONDITION

      Tester Connection Specified Condition
      I1-2 (IGf) - E4-23 (IGF) Below 1 Ω
      I2-2 (IGf) - E4-23 (IGF) Below 1 Ω
      I3-2 (IGf) - E4-23 (IGF) Below 1 Ω
      I4-2 (IGf) - E4-23 (IGF) Below 1 Ω

      Standard resistance (Check for short) 

      Fig 2: Disconnecting E4 ECM Connector
      G04471989Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TESTER CONNECTION AND SPECIFIED CONDITION

      Tester Connection Specified Condition
      I1-2 (IGf) or E4-23 (IGF) - Body ground 10 kΩ or higher
      I2-2 (IGf) or E4-23 (IGF) - Body ground 10 kΩ or higher
      I3-2 (IGf) or E4-23 (IGF) - Body ground 10 kΩ or higher
      I4-2 (IGf) or E4-23 (IGF) - Body ground 10 kΩ or higher
    4. Reconnect the ignition coil and igniter connector.
    5. Reconnect the ECM connector.

    NG : REPAIR OR REPLACE HARNESS AND CONNECTOR 

    OK : GO TO NEXT STEP 

  3. CHECK ECM (IGF VOLTAGE) 
    1. Disconnect the I1, I2, I3 or I4 ignition coil and igniter connector.
    2. Turn the power switch ON (IG).
    3. Measure the voltage between the specified terminals of the E4 and E5 ECM connectors.

      Standard voltage 

      TESTER CONNECTION AND SPECIFIED CONDITION

      Tester Connection Specified Condition
      E4-23 (IGF) - E5-28 (E1) 4.5 to 5.5 V
    4. Reconnect the ignition coil and igniter connector.

    NG : REPLACE ECM 

    Fig 3: Identifying ECM Connector
    G04471990Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK : REPLACE IGNITION COIL 

  4. CHECK HARNESS AND CONNECTOR (IGNITION - ECM (IGT SIGNAL TERMINAL)) 
    1. Disconnect the I1, I2, I3 or I4 ignition coil and igniter connector.
      Fig 4: Disconnecting E4 ECM Connector
      G04471991Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the E4 ECM connector.
    3. Measure the resistance between the wire harness side connectors.

      Standard resistance (Check for open) 

      TESTER CONNECTION AND SPECIFIED CONDITION

      Tester Connection Specified Condition
      I1-3 (IGt) - E4-8 (IGT1) Below 1 Ω
      I2-3 (IGt) - E4-9 (IGT2) Below 1 Ω
      I3-3 (IGt) - E4-10 (IGT3) Below 1 Ω
      I4-3 (IGt) - E4-11 (IGT4) Below 1 Ω

      Standard resistance (Check for short) 

      Fig 5: Identifying Ignition Coil Connector
      G04471992Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TESTER CONNECTION AND SPECIFIED CONDITION

      Tester Connection Specified Condition
      I1-3 (IGT) or E4-8 (IGT1) - Body ground 10 kΩ or higher
      I2-3 (IGT) or E4-9 (IGT2) - Body ground 10 kΩ or higher
      I3-3 (IGT) or E4-10 (IGT3) - Body ground 10 kΩ or higher
      I4-3 (IGT) or E4-11 (IGT4) - Body ground 10 kΩ or higher
    4. Reconnect the ignition coil and igniter connector.
    5. Reconnect the ECM connector.

    NG : REPAIR OR REPLACE HARNESS AND CONNECTOR 

    OK : GO TO NEXT STEP 

  5. CHECK ECM (IGT1, IGT2, IGT3 OR IGT4 VOLTAGE) 
    1. Measure the voltage between the applicable terminals of the E4 and E5 ECM connectors when the engine is cranked.

      Standard voltage 

      TESTER CONNECTION AND SPECIFIED CONDITION

      Tester Connection Specified Condition
      E4-8 (IGT1) - E5-28 (E1) 0.1 to 4.5 V
      E4-9 (IGT2) - E5-28 (E1) 0.1 to 4.5 V
      E4-10 (IGT3) - E5-28 (E1) 0.1 to 4.5 V
      E4-11 (IGT4) - E5-28 ( E1) 0.1 to 4.5 V

    NG : REPLACE ECM 

    Fig 6: Identifying ECM Connectors
    G04471993Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK : GO TO NEXT STEP 

  6. CHECK ECM (IGT1, IGT2, IGT3 OR IGT4 VOLTAGE) 
    1. Disconnect the I1, I2, I3 or I4 ignition coil and igniter connector.
    2. Measure the voltage between the applicable terminals of the E4 and E5 ECM connectors when the engine is cranked.

      Standard voltage 

      TESTER CONNECTION AND SPECIFIED CONDITION

      Tester Connection Specified Condition
      E4-8 (IGT1) - E5-28 (E1) 4.5 V or more
      E4-9 (IGT2) - E5-28 (E1) 4.5 V or more
      E4-10 (IGT3) - E5-28 (E1) 4.5 V or more
      E4-11 (IGT4) - E5-28 (E1) 4.5 V or more
    3. Reconnect the ignition coil and igniter connector.

    NG : REPLACE ECM 

    Fig 7: Identifying ECM Connectors
    G04471994Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK : GO TO NEXT STEP 

  7. CHECK IGNITION COIL (POWER SOURCE) 
    1. Disconnect the I1, I2, I3 or I4 ignition coil and igniter connector.
    2. Turn the power switch ON (IG).
    3. Measure the voltage between the terminal of the wire harness side connector and body ground.

      Standard voltage 

      TESTER CONNECTION AND SPECIFIED CONDITION

      Tester Connection Specified Condition
      I1-1 (+B) - I1-4 (GND) 9 to 14 V
      I2-1 (+B) - I2-4 (GND) 9 to 14 V
      I3-1 (+B) - I3-4 (GND) 9 to 14 V
      I4-1 (+B) - I4-4 (GND) 9 to 14 V
    4. Reconnect the ignition coil and igniter connector.

    OK : REPLACE IGNITION COIL 

    Fig 8: Identifying Ignition Coil And Igniter Connector
    G04471995Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG : GO TO NEXT STEP 

  8. CHECK HARNESS AND CONNECTOR (IGNITION COIL - IG2 RELAY) 
    1. Disconnect the I1, I2, I3 or I4 ignition coil and igniter connector.
      Fig 9: Identifying Ignition Coil And Igniter Connector
      G04471996Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Remove the integration relay from engine room relay block.
    3. Measure the resistance between the wire harness side connectors.

      Standard resistance (Check for open) 

      TESTER CONNECTION AND SPECIFIED CONDITION

      Tester Connection Specified Condition
      I1-1 (+B) - 3I-4 (IG2 relay) Below 1 Ω
      I2-1 (+B) - 3I-4 (IG2 relay) Below 1 Ω
      I3-1 (+B) - 3I-4 (IG2 relay) Below 1 Ω
      I4-1 (+B) - 3I-4 (IG2 relay) Below 1 Ω
      I1-4 (GND) - Body ground Below 1 Ω
      I2-4 (GND) - Body ground Below 1 Ω
      I3-4 (GND) - Body ground Below 1 Ω
      I4-4 (GND) - Body ground Below 1 Ω

      Standard resistance (Check for short) 

      Fig 10: Removing Integration Relay From Engine Room Relay Block
      G04471997Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TESTER CONNECTION AND SPECIFIED CONDITION

      Tester Connection Specified Condition
      I1-1 (+B) or 3I-4 (IG2 relay) - Body ground 10 kΩ or higher
      I2-1 (+B) or 3I-4 (IG2 relay) - Body ground 10 kΩ or higher
      I3-1 (+B) or 3I-4 (IG2 relay) - Body ground 10 kΩ or higher
      I4-1 (+B) - 3I-4 (IG2 relay) 10 kΩ or higher
    4. Reconnect the ignition coil and igniter connector.
    5. Reinstall the integration relay.

    NG : REPAIR OR REPLACE HARNESS AND CONNECTOR 

    OK : REPLACE IGNITION COIL 

scientia non olet · About LEMON Manuals