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DTC B2271: Ignition Hold Monitor Malfunction: Procedure

  1. INSPECT FUSE (AM2) 
    1. Remove the AM2 fuse from the cowl side J/B RH.
    2. Measure the resistance of the fuse.

      Standard resistance

      Below 1 Ω

    NG → REPLACE FUSE 

    OK: Go to next step 

  2. CHECK CONNECTORS 
    1. Check that the connectors are securely connected and the terminals are not deformed or loose.

      OK

      The connectors are securely connected and the terminals are not deformed or loose.

    NG → REPAIR OR REPLACE CONNECTORS 

    OK: Go to next step 

  3. CHECK WIRE HARNESS (POWER SOURCE CONTROL ECU - BATTERY AND BODY GROUND) 
    1. Disconnect the J55 ECU connector.
      Fig 1: Identifying J55 Power Source Control ECU Connector
      GTY143580Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the voltage according to the value(s) in the table below.

      Standard voltage

      Tester Connection (Symbols) Condition Specified Condition
      J55-33 (AM1) - Body ground Always 10 to 14 V
      J55-12 (AM2) - Body ground Always 10 to 14 V
    3. Measure the resistance according to the value(s) in the table below.

      Standard resistance

      Tester Connection (Symbols) Condition Specified Condition
      J55-6 (GND2) - Body ground Always Below 1 Ω

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  4. INSPECT RELAY (IG2) 
    1. Remove the IG2 relay from the engine room R/B No. 2.
      Fig 2: Inspecting Relay (IG2)
      GTY136162Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance

      Tester Connection Specified Condition
      3 - 5 10 kΩ or higher
      3 - 5 Below 1 Ω
      (When battery voltage is applied to terminals 1 and 2)

    NG → See step   10 

    OK: Go to next step 

  5. INSPECT JUNCTION BLOCK 
    1. RH-IG relay:
      Fig 3: Identifying Cowl Side J/B RH Connectors Terminals
      GTY145849Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Disconnect the cowl side J/B RH connectors.
      2. Measure the resistance according to the value(s) in the table below.

        Standard resistance

        Tester Connection Condition Specified Condition
        RD-6 - RA-5 or RD-7 Always 136 to 250 Ω at 20°C (68°F)
        RD-6 - Body ground Always 10 kΩ or higher
    2. LH-IG relay:
      Fig 4: Identifying Cowl Side J/B LH Connectors
      GTY141999Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Disconnect the cowl side J/B LH connectors.
      2. Measure the resistance according to the value(s) in the table below.

        Standard resistance

        Tester Connection Condition Specified Condition
        LD-13 - LD-8 or LD-9 Always 68 to 250 Ω at 20°C (68°F)
        LD-13 - Body ground Always 10 kΩ or higher

    NG → See step   10 

    OK: Go to next step 

  6. CHECK WIRE HARNESS (POWER SOURCE CONTROL ECU - BODY GROUND) 
    1. Measure the resistance according to the value(s) in the table below.
      Fig 5: Identifying Terminal IG2D And IG1D Of J55 Power Source Control ECU Connector
      GTY118687Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard resistance

      Tester Connection (Symbols) Condition Specified Condition
      J55-34 (IG1D) - Body ground Always 10 kΩ or higher
      J55-35 (IG2D) - Body ground Always 10 kΩ or higher

    NG → See step   11 

    OK: Go to next step 

  7. CHECK WIRE HARNESS (COWL SIDE J/B LH - BODY GROUND) 
    1. Measure the resistance according to the value(s) in the table below.
      Fig 6: Identifying Cowl Side J/B LH Connector
      GTY140599Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard resistance

      Tester Connection Condition Specified Condition
      LD-13 - Body ground Always 10 kΩ or higher

    NG → See step   11 

    OK: Go to next step 

  8. CHECK WIRE HARNESS (POWER SOURCE CONTROL ECU - BODY GROUND) 
    1. Reconnect the J55 ECU and J/B connectors.
      Fig 7: Identifying J55 Power Source Control ECU Connector
      GTY139710Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the voltage according to the value(s) in the table below.

      Standard voltage

      Tester Connection (Symbols) Condition Specified Condition
      J55-34 (IG1D) - Body ground Engine switch off Below 1 V
      Engine switch on (IG) 8 to 14 V
      J55-35 (IG2D) - Body ground Engine switch off Below 1 V
      Engine switch on (IG) 8 to 14 V

    NG → REPLACE POWER SOURCE CONTROL ECU 

    OK: Go to next step 

  9. RECHECK FOR DTC 
    1. Delete the DTCs. Refer to DTC CHECK / CLEAR .
    2. Check for DTCs again.

      OK

      DTC B2271 is not output.

    NG → REPLACE POWER SOURCE CONTROL ECU 

    OK → CHECK INTERMITTENT PROBLEMS 

  10. REPLACE FAULTY RELAY OR J/B AND CHECK POWER SOURCE CONTROL ECU 
    1. Replace a faulty relay or J/B and then connect the power source control ECU connector.
      Fig 8: Identifying J55 Power Source Control ECU Connector
      GTY139710Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the voltage according to the value(s) in the table below.

      Standard voltage

      Tester Connection (Symbols) Condition Specified Condition
      J55-34 (IG1D) - Body ground Engine switch off Below 1 V
      Engine switch on (IG) 8 to 14 V
      J55-35 (IG2D) - Body ground Engine switch off Below 1 V
      Engine switch on (IG) 8 to 14 V

    NG → REPLACE POWER SOURCE CONTROL ECU 

    OK → END 

  11. REPAIR OR REPLACE WIRE HARNESS OR CONNECTOR AND CHECK POWER SOURCE CONTROL ECU 
    1. Repair or replace a faulty wire harness or connector and then connect the power source control ECU connector.
      Fig 9: Identifying J55 Power Source Control ECU Connector
      GTY139710Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the voltage according to the value(s) in the table below.

      Standard voltage

      Tester Connection (Symbols) Condition Specified Condition
      J55-34 (IG1D) - Body ground Engine switch off Below 1 V
      Engine switch on (IG) 8 to 14 V
      J55-35 (IG2D) - Body ground Engine switch off Below 1 V
      Engine switch on (IG) 8 to 14 V

    NG → REPLACE POWER SOURCE CONTROL ECU 

    OK → END 

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