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Home >> Scion >> 2006 >> xB Standard >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine Control System (1NZ-FE) >> Parts Location >> 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 malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, 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 WHETHER DTC OUTPUT RECURS (DTC P0351, P0352, P0353 OR P0354) 
    1. Connect the intelligent tester to the DLC3.
    2. Turn the ignition switch ON and turn the tester ON.
    3. Clear DTCs (see DTC CHECK / CLEAR  ).
    4. Shuffle arrangement of the ignition coils (among No. 1 to No. 4 cylinders).
      NOTE: Do not shuffle the connectors.
    5. Perform a simulation test.
    6. Check DTCs displayed on the tester.

      Result 

      RESULT

      Display (DTC Output) Proceed to
      P0351, P0352, P0353 or P0354 A
      Other ignition coil DTC output B

    B: REPLACE IGNITION COIL 

    A: Go to next step 

  2. INSPECT ECM (IGT1, IGT2, IGT3, IGT4 AND IGF SIGNAL) 
    1. Inspect the ECM using an oscilloscope.
      Fig 1: Inspecting ECM Using An Oscilloscope
      G04225583Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. While cranking or idling, check the waveform between the terminals of the E5 ECM connectors.

      Standard voltage 

      TESTER CONNECTION - SPECIFIED CONDITION

      Tester Connection Specified Condition
      IGT1 (E5-17) - E1 (E5-3) Correct waveform is as shown
      IGT2 (E5-16) - E1 (E5-3) Correct waveform is as shown
      IGT3 (E5-15) - E1 (E5-3) Correct waveform is as shown
      IGT4 (E5-14) - E1 (E5-3) Correct waveform is as shown
      IGF (E5-23) - E1 (E5-3) Correct waveform is as shown
      Fig 2: Identifying Blinking Pattern
      G04225584Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK; REPLACE ECM 

    NG: Go to Next Step 

  3. CHECK HARNESS AND CONNECTOR (IGNITION COIL - ECM) 
    1. Disconnect the I2, I3, I4 or I5 ignition coil connector.
    2. Disconnect the E5 ECM connector.
      Fig 3: Disconnecting E5 ECM Connector
      G04225585Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Measure the resistance of the wire harness side connectors.
      Fig 4: Measuring Resistance Of Wire Harness Side Connectors
      G04225586Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard resistance (Check for open) 

      TESTER CONNECTION - SPECIFIED CONDITION

      Tester Connection Specified Condition
      IGF (I2-2) - IGF (E5-23) Below 1 Ω
      IGF (I3-2) - IGF (E5-23) Below 1 Ω
      IGF (I4-2) - IGF (E5-23) Below 1 Ω
      IGF (I5-2) - IGF (E5-23) Below 1 Ω

      Standard resistance (Check for open) 

      TESTER CONNECTION - SPECIFIED CONDITION

      Tester Connection Specified Condition
      IGT (I2-3) - IGT1 (E5-17) Below 1 Ω
      IGT2 (I3-3) - IGT2 (E5-16) Below 1 Ω
      IGT3 (I4-3) - IGT3 (E5-15) Below 1 Ω
      IGT4 (I5-3) - IGT4 (E5-14) Below 1 Ω

      Standard resistance (Check for short) 

      TESTER CONNECTION - SPECIFIED CONDITION

      Tester Connection Specified Condition
      IGF (I2-2) or IGF (E5-23) - Body ground 10 kΩ or higher
      IGF (I3-2) or IGF (E5-23) - Body ground 10 kΩ or higher
      IGF (I4-2) or IGF (E5-23) - Body ground 10 kΩ or higher
      IGF (I5-2) or IGF (E5-23) - Body ground 10 kΩ or higher

      Standard resistance (Check for short) 

      TESTER CONNECTION - SPECIFIED CONDITION

      Tester Connection Specified Condition
      IGT (I2-3) or IGT1 (E5-17) - Body ground 10 kΩ or higher
      IGT2 (I3-3) or IGT2 (E5-16) - Body ground 10 kΩ or higher
      IGT3 (I4-3) or IGT3 (E5-15) - Body ground 10 kΩ or higher
      IGT4 (I5-3) or IGT4 (E5-14) - Body ground 10 kΩ or higher

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to Next Step 

  4. INSPECT IGNITION COIL (POWER SOURCE) 
    1. Disconnect the I2, I3, I4 or I5 ignition coil connector.
    2. Measure the resistance of the ignition coil connectors.

      Standard resistance (Check for open) 

      TESTER CONNECTION - SPECIFIED CONDITION

      Tester Connection Specified Condition
      GND (I2-4) - Body ground Below 1 Ω
      GND (I3-4) - Body ground
      GND (I4-4) - Body ground
      GND (I5-4) - Body ground
      Fig 5: Measuring Resistance Of Ignition Coil Connectors
      G04225587Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Turn the ignition switch ON.
    4. Measure the voltage between the terminals of the wire harness side connectors.

      Standard voltage 

      TESTER CONNECTION - SPECIFIED CONDITION

      Tester Connection Specified Condition
      +B (I2-1) - GND (I2-4) 9 to 14 V
      +B (I3-1) - GND (I3-4) 9 to 14 V
      +B (I4-1) - GND (I4-4) 9 to 14 V
      +B (I5-1) - GND (I5-4) 9 to 14 V

    NG: Go to step 5 

    OK: REPLACE IGNITION COIL 

  5. CHECK HARNESS AND CONNECTOR (IGNITION COIL ASSEMBLY - IGNITION SWITCH) 
    1. Disconnect the I2, I3, I4 or I5 ignition coil connector.
      Fig 6: Checking Ignition Coil - Ignition Switch Connector
      G04225588Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the I10 ignition switch connector.
    3. Measure the resistance of the wire harness side connectors.

      Standard resistance (Check for open) 

      TESTER CONNECTION - SPECIFIED CONDITION

      Tester Connection Specified Condition
      +B (I2-1) - IG2 (I10-6) Below 1 Ω
      +B (I3-1) - IG2 (I10-6) Below 1 Ω
      +B (I4-1) - IG2 (I10-6) Below 1 Ω
      +B (I5-1) - IG2 (I10-6) Below 1 Ω
      Fig 7: Measuring Resistance Of Wire Harness Side Connectors
      G04225589Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard resistance (Check for short) 

      TESTER CONNECTION - SPECIFIED CONDITION

      Tester Connection Specified Condition
      +B (I2-1) or IG2 (I10-6) - Body ground 10 kΩ or higher
      +B (I3-1) or IG2 (I10-6) - Body ground 10 kΩ or higher
      +B (I4-1) or IG2 (I10-6) - Body ground 10 kΩ or higher
      +B (I5-1) or IG2 (I10-6) - Body ground 10 kΩ or higher

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: REPLACE IGNITION COIL 

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