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Inspection Procedure

WARNING: This page is about a different variant/trim than selected.
  1. READ VALUE USING TECHSTREAM (ACC RELAY MONITOR) 
    1. Connect the Techstream to the DLC3.
    2. Turn the engine switch on (IG) and turn the Techstream on.
    3. Enter the following menus: Body Electrical / Main Body / Data List.
    4. Read the display on the Techstream.

      Main Body 

      MAIN BODY - DATA LIST

      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      ACC Relay Monitor ACC relay monitor/ON or OFF ON: Engine switch on (ACC)
      OFF: Engine switch off      		 -

      OK: 

      When the engine switch is turned on (ACC), ON is displayed on the Techstream. 

      NG: Go to step  3

      OK: Go to next step 

  2. CHECK SWITCH CONDITION (ENGINE SWITCH) 
    1. Make sure that the electrical key is inside the cabin.
    2. With the shift lever in P, check that the power source mode changes as shown below each time the engine switch is pushed.

      OK: 

      off → on (ACC) → on (IG) → off 

      NG: GO TO POWER SOURCE MODE DOES NOT CHANGE  (See )

      OK: USE SIMULATION METHOD TO CHECK  (See ELECTRONIC CIRCUIT INSPECTION PROCEDURE )

  3. INSPECT ACC RELAY 
    1. Remove the ACC relay from the No. 5 relay block.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance 

      RESISTANCE SPECIFICATION

      Tester Connection Condition Specified Condition
      3-5 Battery voltage is applied to terminals 1 and 2 Below 1 Ω
      3-5 Battery voltage is not applied to terminals 1 and 2 10 kΩ or higher
      Fig 1: Inspecting ACC Relay
      G04978973Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      NG: REPLACE ACC RELAY 

      OK: Go to next step 

  4. CHECK HARNESS AND CONNECTOR (ACC RELAY - MAIN BODY ECU AND BODY GROUND) 
    1. Remove the ACC relay from the No. 5 relay block.
    2. Disconnect the E15 main body ECU connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance 

      RESISTANCE SPECIFICATION

      Tester Connection Condition Specified Condition
      Relay block ACC relay terminal 1 - E15-4 (ACCD) Always Below 1 Ω
      Relay block ACC relay terminal 2 - Body ground Always Below 1 Ω
      Relay block ACC relay terminal 1 or E15-4 (ACCD) - Body ground Always 10 kΩ or higher

      NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

      Fig 2: Identifying E15 Main Body ECU Connector Terminals
      G05999309Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      OK: REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK) 

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