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Home › Toyota › 2005 › Prius › Repair and Diagnosis › Body & Frame › Ignition Switch/Steering Lock › Push Button Start System - Diagnostics › DTC B2271: Ignition Hold Monitor Malfunction › Inspection Procedure

Inspection Procedure

  1. CHECK FOR DTC 
    1. Delete the DTC (See DTC CHECK/CLEAR  ).
    2. Check for DTCs again.

      OK: No DTC is output. 

    1. NG: Go to step 2 
    2. OK: GO TO NEXT STEP 

      END 

  2. INSPECT FUSE (AM1, AM2) 
    1. Remove the AM1 fuse from the instrument panel J/B.
    2. Remove the AM2 fuse from the engine room J/B.
    3. Measure the resistance of the fuses.

      Standard: Below 1 Ω 

    1. NG: REPLACE FUSE 
    2. OK: GO TO NEXT STEP 
  3. CHECK WIRE HARNESS (POWER SOURCE CONTROL ECU - BATTERY) 
    Fig 1: Disconnecting P6 ECU Connector
    G02617838Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the P6 ECU connector.
    2. Measure the voltage of the wire harness side connector.

      Standard: 

      TESTER CONNECTION AND SPECIFIED CONDITION CHART

      Tester Connection Specified Condition
      P6-33 (AM1) - Body ground 10 to 14 V
      P6-12 (AM2) - Body ground 10 to 14 V
    1. NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 
    2. OK: GO TO NEXT STEP 

      REPLACE POWER SOURCE CONTROL ECU 

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