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Test Mode Procedure [09/2015 - 08/2020]

  1. TEST MODE (VGRS SENSOR SIGNAL CHECK) 

    HINT: 

    • When the system enters test mode, "VGRS Test Mode" is displayed on the multi-information display.
    • Before entering test mode, check and repair any malfunctions indicated by the output current DTCs of the VGRS system.
    • By switching from normal mode to test mode, the steering sensor can be inspected.
    • When entering test mode, the VGRS ECU (steering control ECU) stores all the test mode DTCs first.
    • When the system is switched from test mode to normal mode, all the test mode DTCs are cleared.
    1. Procedure to enter Test Mode (using Techstream)
      1. Turn the engine switch off.
      2. Connect the Techstream to the DLC3.
      3. Turn the engine switch on (IG).
      4. Turn the Techstream on.
      5. Enter the following menus: Chassis / VGRS / Utility / Check Mode.
    2. Procedure to enter Test Mode (using SST check wire)
      1. Turn the engine switch off.
      2. Using SST, connect terminals 12 (TS) and 4 (CG) of the DLC3.
        Fig 1: 12 (TS) and 4 (CG) Terminals of DLC3 Connector End View
        GTY524678Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        TEXT IN ILLUSTRATION

        * a Front view of DLC3
        • SST: 09843-18040 
      3. Turn the engine switch on (IG).
    3. Check the Test Mode display.
      1. Check that "VGRS Test Mode" is displayed on the multi-information display when the system enters Test Mode.
    4. Check the steering sensor signal and motor rotation signal.
      1. Start the engine.
      2. Rotate the steering wheel slowly from lock to lock.

        HINT: 

        • The state of the master warning light does not change.
        • When the steering signal is confirmed to be normal, the test mode DTC C15C4/68 is cleared.
        • When the steering sensor zero point calibration is performed and the motor rotation signal is confirmed to be normal, the test mode DTC C15C5/69 is cleared.
    5. Read Test Mode DTCs (using SST check wire)
      NOTE:

      Perform these procedures with the vehicle stopped.

      1. Turn the engine switch off.
      2. Using SST, connect terminals 12 (TS), 13 (TC) and 4 (CG) of the DLC3.
        Fig 2: 12 (TS), 13 (TC) and 4 (CG) Terminals of DLC3 Connector End View
        GTY536062Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        TEXT IN ILLUSTRATION

        * a Front view of DLC3
        • SST: 09843-18040 
      3. Turn the engine switch on (IG).
      4. Read the 2-digit test mode DTCs from the multi-information display.
    6. Clear Test Mode DTCs (using Techstream)
      1. After completing test mode, disconnect the Techstream and turn the engine switch off.
    7. Clear Test Mode DTCs (using SST check wire)
      1. Turn the engine switch off.
      2. Disconnect SST from the DLC3.
        • SST: 09843-18040 
      3. Turn the engine switch on (IG).

        HINT: 

        If the engine switch is turned on (IG) with terminals 12 (TS) and 4 (CG) connected, the system remains in test mode.

  2. TEST MODE DTC 
    1. If a trouble code is output during the DTC check, check the trouble area indicated by the DTC. For details of each code, proceed to the DTC chart.
      DTC Code
      [SAE / MID]      		 Detection Item Trouble Area Proceed to
      C15C4/68 Steering signal indicating tire angle of 36° or more (to left or right) is input after entering test mode*
      • Steering sensor
      • VGRS ECU (steering control ECU)
      • Harness or connector
      		 Refer to DTC C1595/55: Lost Communication with Steering Angle Sensor Module; DTC C15C4/68: Steering Angle Signal (Test Mode DTC) [09/2015 - 08/2020]
      C15C5/69 Steering signal indicating motor rotation angle of 36° or more (to left or right) is input after entering test mode*
      • Steering actuator assembly
      • VGRS ECU (steering control ECU)
      • Harness or connector
      		 Refer to DTC C15A3/63: Motor Rotation Angle Not Detected; DTC C15C5/69: Motor Rotation Signal Not Detected [09/2015 - 08/2020]

      HINT: 

      • *: A tire angle of 36° and a motor rotation angle of 36° correspond to the steering wheel angle. The amount of change in tire angle and motor rotation angle is from when the system is changed to test mode.
      • The "SAE" test mode DTCs are the codes displayed on the diagnostic tool. The "MID" test mode DTCs are the codes displayed on the multi-information display in the combination meter (SAE: Society of Automotive Engineers).
      • The "SAE" test mode DTCs for VGRS test mode are not displayed on the Techstream.
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