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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 / Display (Range) Normal Condition Diagnostic Note
    ACC RELAY MON Status of ACC Relay Monitor/ ON or OFF ON: Engine switch ON (ACC) OFF: Engine switch OFF -

    OK: 

    "ON" (engine switch on (ACC)) 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. INSPECT RELAY (Marking: ACC) 
    1. Remove the ACC relay for the instrument panel J/B.
    2. Measure the resistance according to the value(s) in the table below.
      Fig 1: Identifying Relay Connector Terminals (Marking ACC)
      G05000344Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Resistance 

      TESTER CONNECTION SPECIFIED CONDITION

      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: REPLACE RELAY 

    OK: Go to Next Step 

  3. CHECK WIRE HARNESS (ACC RELAY - POWER SOURCE CONTROL ECU AND BODY GROUND) 
    1. Disconnect the D44 ECU connector.
      Fig 2: Identifying D44 ECU Connector Terminal ACCD
      G05000345Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below. 
      Fig 3: Identifying ACC Relay Connector Terminals
      G05000346Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Resistance 

      RESISTANCE SPECIFICATION

      Terminal No. (Symbol) Specified Condition
      J/B ACC relay terminal 2 - D44-11 (ACCD) Below 1 Ω
      J/B ACC relay terminal 2 - Body ground 10 kΩ or higher
      J/B ACC relay terminal 1 - Body ground Below 1 Ω

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: REPLACE POWER SOURCE CONTROL ECU 

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