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Home >> Lexus >> 2024 >> TX 350 Base, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 41 (Engine Control System - Diagnostic Codes (3 Of 6)) >> SFI System >> DTC P0351-13: Ignition Coil "A" Circuit Open; DTC P0352-13: Ignition Coil "B" Circuit Open; DTC P0353-13: Ignition Coil "C" Circuit Open; DTC P0354-13: Ignition Coil "D" Circuit Open; DTC P0355-13: Ignition Coil "E" Circuit Open; DTC P0356-13: Ignition Coil "F" Circuit Open [12/2023 - ] >> Procedure

DTC P0351-13: Ignition Coil "A" Circuit Open; DTC P0352-13: Ignition Coil "B" Circuit Open; DTC P0353-13: Ignition Coil "C" Circuit Open; DTC P0354-13: Ignition Coil "D" Circuit Open; DTC P0355-13: Ignition Coil "E" Circuit Open; DTC P0356-13: Ignition Coil "F" Circuit Open [12/2023 - ]: Procedure

WARNING: This page is about a different car, the 2024 Lexus TX 550h+. However, it is still accessible from the selected car via links, so may be relevant.
  1. CLEAR DTC 

    Pre-procedure1

    • None.
    • Clear the DTCs.

      Powertrain > Engine > Clear DTCs 

      Result

      Proceed to
      NEXT

    Post-procedure1

    • Turn the ignition switch off and wait for at least 30 seconds.

    Result: 

    NEXT 

    See step  2

  2. CHECK WHETHER DTC OUTPUT RECURS (DTC P0351-13, P0352-13, P0353-13, P0354-13, P0355-13 OR P0356-13) 

    Pre-procedure1

    • Shuffle the arrangement of the ignition coil assemblies (among No. 1 to No. 6 cylinders).
      NOTE:

      Do not change the location of the connectors.

    • Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.
    • Read the DTCs.

      Powertrain > Engine > Trouble Codes 

      Result

      Result Proceed to
      Same DTC output A
      Different ignition coil DTC output B

    Post-procedure1

    • None.

    Result: 

    B 

    REPLACE IGNITION COIL ASSEMBLY. Refer to  REMOVAL [12/2023 - ] 

    Result: 

    A 

    See step  3

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

    Pre-procedure1

    • Disconnect the ignition coil assembly connector.
    • Turn the ignition switch ON.
    • Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Condition Specified Condition Result
      C66-1 (+B) - Body ground Ignition switch ON 11 to 14 V V
      C68-1 (+B) - Body ground Ignition switch ON 11 to 14 V V
      C71-1 (+B) - Body ground Ignition switch ON 11 to 14 V V
      C67-1 (+B) - Body ground Ignition switch ON 11 to 14 V V
      C69-1 (+B) - Body ground Ignition switch ON 11 to 14 V V
      C72-1 (+B) - Body ground Ignition switch ON 11 to 14 V V

      Result

      Result
      OK
      NG

    Post-procedure1

    • None.

    Result: 

    NG 

    See step  6

    Result: 

    OK 

    See step  4

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

    Pre-procedure1

    • Disconnect the ignition coil assembly connector.
    • Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition Result
      C66-4 (GND) - Body ground Always Below 1 Ω Ω
      C68-4 (GND) - Body ground Always Below 1 Ω Ω
      C71-4 (GND) - Body ground Always Below 1 Ω Ω
      C67-4 (GND) - Body ground Always Below 1 Ω Ω
      C69-4 (GND) - Body ground Always Below 1 Ω Ω
      C72-4 (GND) - Body ground Always Below 1 Ω Ω

      Result

      Proceed to
      OK
      NG

    Post-procedure1

    • None.

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  5

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

    Pre-procedure1

    • Disconnect the ignition coil assembly connector.
    • Disconnect the ECM connector.
    • Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition Result
      C66-2 (IGF1) - C86-36 (IGF1) Always Below 1 Ω Ω
      C67-2 (IGF2) - C86-35 (IGF2) Always Below 1 Ω Ω
      C68-2 (IGF1) - C86-36 (IGF1) Always Below 1 Ω Ω
      C69-2 (IGF2) - C86-35 (IGF2) Always Below 1 Ω Ω
      C71-2 (IGF1) - C86-36 (IGF1) Always Below 1 Ω Ω
      C72-2 (IGF2) - C86-35 (IGF2) Always Below 1 Ω Ω
      C66-3 (IGT1) - C86-71 (IGT1) Always Below 1 Ω Ω
      C67-3 (IGT2) - C86-75 (IGT2) Always Below 1 Ω Ω
      C68-3 (IGT3) - C86-70 (IGT3) Always Below 1 Ω Ω
      C69-3 (IGT4) - C86-74 (IGT4) Always Below 1 Ω Ω
      C71-3 (IGT5) - C86-69 (IGT5) Always Below 1 Ω Ω
      C72-3 (IGT6) - C86-73 (IGT6) Always Below 1 Ω Ω
      C66-2 (IGF1) or C86-36 (IGF1) - Body ground and other terminals Always 10 kΩ or higher kΩ
      C67-2 (IGF2) or C86-35 (IGF2) - Body ground and other terminals Always 10 kΩ or higher kΩ
      C68-2 (IGF1) or C86-36 (IGF1) - Body ground and other terminals Always 10 kΩ or higher kΩ
      C69-2 (IGF2) or C86-35 (IGF2) - Body ground and other terminals Always 10 kΩ or higher kΩ
      C71-2 (IGF1) or C86-36 (IGF1) - Body ground and other terminals Always 10 kΩ or higher kΩ
      C72-2 (IGF2) or C86-35 (IGF2) - Body ground and other terminals Always 10 kΩ or higher kΩ
      C66-3 (IGT1) or C86-71 (IGT1) - Body ground and other terminals Always 10 kΩ or higher kΩ
      C67-3 (IGT2) or C86-75 (IGT2) - Body ground and other terminals Always 10 kΩ or higher kΩ
      C68-3 (IGT3) or C86-70 (IGT3) - Body ground and other terminals Always 10 kΩ or higher kΩ
      C69-3 (IGT4) or C86-74 (IGT4) - Body ground and other terminals Always 10 kΩ or higher kΩ
      C71-3 (IGT5) or C86-69 (IGT5) - Body ground and other terminals Always 10 kΩ or higher kΩ
      C72-3 (IGT6) or C86-73 (IGT6) - Body ground and other terminals Always 10 kΩ or higher kΩ

      Result

      Proceed to
      OK
      NG

    Post-procedure1

    • None.

    Result: 

    OK 

    REPLACE ECM. Refer to  REMOVAL [12/2023 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

  6. INSPECT IGP NO. 1 RELAY 

    Refer to PROCEDURE - Step 5

    Result

    Proceed to
    OK
    NG

    Result: 

    NG 

    REPLACE IGP NO. 3 RELAY 

    Result: 

    OK 

    See step  7

  7. CHECK TERMINAL VOLTAGE (POWER SOURCE OF IGP NO. 1 RELAY) 

    Pre-procedure1

    • Remove the IGP NO. 1 relay from the No. 1 engine room relay block and No. 1 junction block assembly.
    • Measure the voltage according to the value(s) in the table below.
      GTY1232064Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 No. 1 Engine Room Relay Block and No. 1 Junction Block Assembly
      *2 IGP NO. 1 Relay

      Standard Voltage

      Tester Connection Condition Specified Condition Result
      3 (IGP NO. 1 relay) - Body ground Always 11 to 14 V V

      Result

      Proceed to
      OK
      NG

    Post-procedure1

    • None.

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR (IGP NO. 1 RELAY - AUXILIARY BATTERY) 

    Result: 

    OK 

    See step  8

  8. CHECK HARNESS AND CONNECTOR (IGP NO. 1 RELAY - IGNITION COIL ASSEMBLY) 

    Pre-procedure1

    • Remove the IGP NO. 1 relay from the No. 1 engine room relay block and No. 1 junction block assembly.
    • Disconnect the ignition coil assembly connector.
    • Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition Result
      5 (IGP NO. 1 relay) - C66-1 (+B) Always Below 1 Ω Ω
      5 (IGP NO. 1 relay) - C67-1 (+B) Always Below 1 Ω Ω
      5 (IGP NO. 1 relay) - C68-1 (+B) Always Below 1 Ω Ω
      5 (IGP NO. 1 relay) - C69-1 (+B) Always Below 1 Ω Ω
      5 (IGP NO. 1 relay) - C71-1 (+B) Always Below 1 Ω Ω
      5 (IGP NO. 1 relay) - C72-1 (+B) Always Below 1 Ω Ω
      5 (IGP NO. 1 relay) or C66-1 (+B) - Body ground and other terminals Always 10 kΩ or higher kΩ
      5 (IGP NO. 1 relay) or C67-1 (+B) - Body ground and other terminals Always 10 kΩ or higher kΩ
      5 (IGP NO. 1 relay) or C68-1 (+B) - Body ground and other terminals Always 10 kΩ or higher kΩ
      5 (IGP NO. 1 relay) or C69-1 (+B) - Body ground and other terminals Always 10 kΩ or higher kΩ
      5 (IGP NO. 1 relay) or C71-1 (+B) - Body ground and other terminals Always 10 kΩ or higher kΩ
      5 (IGP NO. 1 relay) or C72-1 (+B) - Body ground and other terminals Always 10 kΩ or higher kΩ

      Result

      Proceed to
      OK
      NG

    Post-procedure1

    • None.

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  9

  9. CHECK HARNESS AND CONNECTOR (IGP NO. 1 RELAY - BODY GROUND) 

    Pre-procedure1

    • Remove the IGP NO. 1 relay from the No. 1 engine room relay block and No. 1 junction block assembly.
    • Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition Result
      2 (IGP NO. 1 relay) - Body ground Always Below 1 Ω Ω

      Result

      Proceed to
      OK
      NG

    Post-procedure1

    • None.

    Result: 

    OK 

    GO TO SMART ENTRY AND START SYSTEM (FOR START FUNCTION). Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [09/2023 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

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