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HOMESERVICE MANUALSTOYOTA2009AVALON LIMITEDREPAIR AND DIAGNOSISENGINE MECHANICALSTARTERSTARTING SYSTEM (2GR-FE)SMART KEY SYSTEMDIAGNOSIS SYSTEM
2009 Toyota Avalon Limited

Diagnosis System

2009 Toyota Avalon LimitedSECTION Diagnosis System
  1. DESCRIPTION 
    1. Push button start system data and its Diagnostic Trouble Code (DTCs) can be read in the Data Link Connector 3 (DLC3) of the vehicle. When the system seems to be malfunctioning, use Techstream to check for malfunctions and perform repairs.
  2. CHECK DLC3 
    1. The ECU uses ISO 15765-4 for communication protocol. The terminal arrangement of the DLC3 complies with SAE J1962 and matches the ISO 15765-4 format.
      Fig 1: Identifying DLC3 Connector Terminals
      G04828034Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TESTER CONNECTION SPECIFIED CONDITION CHART

      Symbols (Terminal No.) Terminal Description Condition Specified Condition
      SIL (7) - SG (5) Bus "+" line During transmission Pulse generation
      CG (4) - Body ground Chassis ground Always Below 1 Ω
      SG (5) - Body ground Signal ground Always Below 1 Ω
      BAT (16) - Body ground Battery positive Always 11 to 14 V
      CANH (6) - CANL (14) CAN bus line Ignition switch off(1) 54 to 69 Ω
      CANH (6) - CG (4) HIGH-level CAN bus line Ignition switch off(1) 200 Ω or higher
      CANL (14) - CG (4) LOW-level CAN bus line Ignition switch off(1) 200 ii or higher
      CANH (6) - BAT (16) HIGH-level CAN bus line Ignition switch off(1) 6 kΩ or higher
      CANL (14) - BAT (16) LOW-level CAN bus line Ignition switch off(1) 6 kΩ or higher
      (1) Before measuring the resistance, leave the vehicle as it is for at least 1 minute and do not operate the ignition switch, or any other switches or the doors.
    2. If the result is not as specified, DLC3 may have a malfunction. Repair or replace the harness and connector.

      HINT:

      Connect the cable of Techstream to DLC3, turn the ignition switch to the ON position and attempt to use the tester. If the display indicates that a communication error has occurred, there is a problem either with the vehicle or with the tester.

      • If communication is normal when the tester is connected to another vehicle, inspect DLC3 of the original vehicle.
      • If communication is still not possible when the tester is connected to another vehicle, the problem may be in the tester itself. Consult the Service Department listed in the tester's instruction manual.
  3. INSPECT BATTERY VOLTAGE 
    1. Inspect the battery voltage.

      Voltage: 11 to 14 V 

      If voltage is below 11 V, recharge the battery before proceeding.

RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.