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Home >> Lexus >> 2023 >> NX 250 AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 130 (Engine Control System - Diagnostic Codes (P2100-P2270)) >> SFI System >> DTC P21CF-13: Cylinder 1 Injector "B" Circuit Open; DTC P21D0-13: Cylinder 2 Injector "B" Circuit Open; DTC P21D1-13: Cylinder 3 Injector "B" Circuit Open; DTC P21D2-13: Cylinder 4 Injector "B" Circuit Open [11/2021 - ] >> Procedure

DTC P21CF-13: Cylinder 1 Injector "B" Circuit Open; DTC P21D0-13: Cylinder 2 Injector "B" Circuit Open; DTC P21D1-13: Cylinder 3 Injector "B" Circuit Open; DTC P21D2-13: Cylinder 4 Injector "B" Circuit Open [11/2021 - ]: Procedure

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  1. CHECK DTCS OUTPUT (IN ADDITION TO DTC P21CF-13, P21D0-13, P21D1-13 OR P21D2-13) 
    1. Read the DTCs.

      Powertrain > Engine > Trouble Codes 

      Result

      Result Proceed to
      DTC P21CF-13, P21D0-13, P21D1-13 or P21D2-13 is output A
      DTC P21CF-13, P21D0-13, P21D1-13 and P21D2-13 are output B

    Result: 

    B 

    REPAIR OR REPLACE HARNESS OR CONNECTOR (IG2 NO. 1 RELAY - PORT FUEL INJECTOR ASSEMBLY) 

    Result: 

    A 

    See step  2

  2. CHECK TERMINAL VOLTAGE (POWER SOURCE OF PORT FUEL INJECTOR ASSEMBLY) 
    1. Disconnect the port fuel injector assembly connector.
    2. Turn the ignition switch to ON.
    3. Measure the voltage according to the value(s) in the table below

      Standard Voltage

      Tester Connection Condition Specified Condition
      B83-1 (#1) - Body ground Ignition switch ON 11 to 14 V
      B84-1 (#2) - Body ground Ignition switch ON 11 to 14 V
      B85-1 (#3) - Body ground Ignition switch ON 11 to 14 V
      B86-1 (#4) - Body ground Ignition switch ON 11 to 14 V

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  5

    Result: 

    OK 

    See step  3

  3. CHECK HARNESS AND CONNECTOR (PORT FUEL INJECTOR ASSEMBLY - ECM) 
    1. Disconnect the ECM connector.
    2. Disconnect the port fuel injector assembly connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      B83-2 (#10) - B49-41 (#10) Always Below 1 Ω
      B84-2 (#20) - B49-39 (#20) Always Below 1 Ω
      B85-2 (#30) - B49-40 (#30) Always Below 1 Ω
      B86-2 (#40) - B49-42 (#40) Always Below 1 Ω
      B83-2 (#10) or B49-41 (#10) - Body ground and other terminals Always 10 kΩ or higher
      B84-2 (#20) or B49-39 (#20) - Body ground and other terminals Always 10 kΩ or higher
      B85-2 (#30) or B49-40 (#30) - Body ground and other terminals Always 10 kΩ or higher
      B86-2 (#40) or B49-42 (#40) - Body ground and other terminals Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  4

  4. INSPECT PORT FUEL INJECTOR ASSEMBLY (RESISTANCE) 
    1. Inspect the port fuel injector assembly.

      Refer to INSPECTION [11/2021 - ]

      HINT: 

      Perform "Inspection After Repair" after replacing the port fuel injector assembly.

      Refer to INITIALIZATION [11/2021 - ]

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE ECM. Refer to  REMOVAL [11/2021 - ] 

    Result: 

    NG 

    REPLACE PORT FUEL INJECTOR ASSEMBLY. Refer to  REMOVAL [11/2021 - 03/2023]  , or refer to  REMOVAL [03/2023 - ] 

  5. INSPECT INJ RELAY 
    1. Inspect the INJ relay.

      Refer to PROCEDURE - Step 1

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE INJ RELAY 

    Result: 

    OK 

    See step  6

  6. CHECK TERMINAL VOLTAGE (POWER SOURCE OF INJ RELAY) 
    1. Remove the INJ relay from the No. 1 engine room relay block and No. 1 junction block assembly.
      GTY1253940Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *1 No. 1 Engine Room Relay Block and No. 1 Junction Block Assembly
      *2 INJ Relay
    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Condition Specified Condition
      3 (INJ relay) - Body ground Always 11 to 14 V

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

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

    Result: 

    OK 

    See step  7

  7. CHECK HARNESS AND CONNECTOR (INJ RELAY - BODY GROUND) 
    1. Remove the INJ relay from the No. 1 engine room relay block and No. 1 junction block assembly.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      1 (INJ relay) - Body ground Always Below 1 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  8

  8. CHECK HARNESS AND CONNECTOR (INJ RELAY - PORT FUEL INJECTOR ASSEMBLY) 
    1. Remove the INJ relay from the No. 1 engine room relay block and No. 1 junction block assembly.
    2. Disconnect the port fuel injector assembly connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      5 (INJ relay) - B83-1 (#1) Always Below 1 Ω
      5 (INJ relay) - B84-1 (#2) Always Below 1 Ω
      5 (INJ relay) - B85-1 (#3) Always Below 1 Ω
      5 (INJ relay) - B86-1 (#4) Always Below 1 Ω
      5 (INJ relay), B83-1 (#1), B84-1 (#2), B85-1 (#3) or B86-1 (#4) - Body ground and other terminals Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPAIR OR REPLACE HARNESS OR CONNECTOR (EFI-MAIN NO. 1 RELAY - INJ RELAY) 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

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