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Home >> Toyota >> 2007 >> Avalon Touring >> Repair and Diagnosis >> Engine Mechanical >> Starter >> Starting System >> Smart Key System >> DTC B2281 "P" Signal Malfunction >> Inspection Procedure

Inspection Procedure

  1. READ VALUE OF INTELLIGENT TESTER 
    1. Connect the intelligent tester to the DLC3.
    2. Turn the engine switch on (IG) and press the intelligent tester main switch on.
    3. Read the DATA LIST according to the displays on the tester.

    PWR SOURCE CTRL (Power source control ECU): 

    DATA LIST

    Item Measurement Item / Range (Display) Normal Condition Diagnostic Note
    SHIFT P SIG Shift P Signal / ON or OFF ON: Shift P signal ON (Shift position is P)
    OFF: Shift P signal OFF (Shift position is not P)    		 -

    OK: 

    "ON" (P signal is ON) appears on the screen. 

    Result 

    RESULT

    Condition Proceed to
    NG C
    OK (When troubleshooting according to the PROBLEM SYMPTOM TABLE) B
    OK (When troubleshooting according to the DTC chart) A

    B: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN  PROBLEM SYMPTOMS TABLE  

    C:  Go to step 2 below.

    A: REPLACE POWER SOURCE CONTROL ECU 

  2. CHECK WIRE HARNESS (POWER SOURCE CONTROL ECU - SHIFT LOCK CONTROL ECU) 
    1. Disconnect the D44 ECU connector.
      Fig 1: Identifying D44 ECU Connector Terminal P
      G05000360Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disconnect the D25 ECU connector.
    3. Measure the resistance according to the value(s) in the table below.
      Fig 2: Identifying D25 ECU Connector Terminals
      G05000361Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Resistance 

      RESISTANCE SPECIFICATION

      Terminal No. (Symbol) Specified Condition
      D44-5 (P) - D25-11 (P2) Below 1 Ω
      D44-5 (P) - Body ground 10 kΩ or higher

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to Next Step 

  3. CHECK POWER SOURCE CONTROL ECU OPERATION 
    1. After replacing the power source control ECU with a normally functioning ECU, check that the push button start function can start normally.

      OK: 

      Push button start function can start normally. 

    NG: GO TO SHIFT CONTROL SYSTEM. Refer to  SHIFT LOCK SYSTEM 

    OK: END (POWER SOURCE CONTROL ECU DEFECTIVE) 

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