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Home >> Lexus >> 2007 >> GS 350 AWD >> Repair and Diagnosis >> Electrical >> Starter >> Starting (2GR-FSE) >> Smart Access System With Push-Button Start >> DTC B2273 Ignition 2 Monitor Malfunction >> Inspection Procedure

Inspection Procedure

  1. INSPECT RELAY (Marking: IG2) 
    1. Remove the IG2 relay from the engine room R/B No. 2.
    2. Measure the resistance of the relay.

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION CHART

      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)
    Fig 1: Inspecting Ignition 2 Relay
    G05287743Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPLACE RELAY 

    OK: Go to next step 

  2. CHECK WIRE HARNESS (ENGINE ROOM R/B NO. 2 - POWER SOURCE CONTROL ECU) 
    1. Remove the IG2 relay from the engine room R/B No. 2.
    2. Disconnect the K73 ECU connector.
    3. Measure the resistance of the wire harness side connectors.

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION CHART

      Tester Connection Specified Condition
      Engine room R/B No. 2 IG2 relay terminal 2 - K73-35 (IG2D) Below 1 Ω
      Engine room R/B No. 2 IG2 relay terminal 1 - Body ground Below 1 Ω
    Fig 2: Identifying Engine Room R/B No. 2 - Power Source Control ECU Connector Terminals
    G05287744Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

    OK: REPLACE POWER SOURCE CONTROL ECU