Diagnosis System [12/2013 - 11/2016]

Dynamic torque control AWD system data can be read through the Data Link Connector 3 (DLC3) of the vehicle. When the system seems to be malfunctioning, use the Techstream to check for malfunctions and perform repairs. Therefore when there seems to be a problem with the dynamic torque control AWD system, use the Techstream or SST to check and troubleshoot it.

1. Check the DLC3.

   Refer to GENERAL INFORMATION [12/2013 - ]

1. If a malfunction occurs during system operation, "CHECK AWD SYSTEM" will be displayed on the multi-information display to inform the driver of the system malfunction.

   HINT: 

   Check that the master warning light comes on for approximately 4 seconds.

   Fig 1: AWD Warning

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *A	Multi-information Display (Color Type)
   *B	Multi-information Display (Monochrome Type)

1. Turn the ignition switch to ON, and check that the master warning light comes on for approximately 4 seconds.

   HINT: 

   The master warning light goes off while the system is in DTC output mode.

1. Check AWD warning.
   1. Using SST, connect terminals 13 (TC) and 4 (CG) of the DLC3 (to enter DTC output mode).
      Fig 2: DLC3 Connector End View F25

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      *a	Front view of DLC3

      • SST: 09843-18040 
   2. Turn the ignition switch to ON.
   3. "DIAGNOSIS CODE AWD" is displayed on the multi-information display, and the 4WD ECU assembly checks the system for malfunctions.
      • If the AWD control system is normal, "DIAGNOSIS CODE AWD FF" will be displayed on the multi-information display.
      • If the AWD control system is not normal, "DIAGNOSIS CODE AWD XX (DTC)" will be displayed on the multi-information display.
      • Although Test Mode is not set for the dynamic torque control AWD system, a message will be displayed on the multi-information display when Test Mode is activated for checking the VSC, etc.

      HINT: 

      • Test mode DTCs will not be stored because test mode is not set.
      • If the systems above are not displayed on the multi-information display, there may be a malfunction in the TC and CG terminal circuit.
      • If the AWD warning check result is not normal, proceed to troubleshooting for the AWD warning circuit.

      Trouble Area	See Procedure
      AWD warning (Remains on)	Refer to AWD Warning Remains ON [12/2013 - 11/2016]
      AWD warning (Does not come on)	Refer to AWD Warning does not Come ON [12/2013 - ]

1. Check AWD lock mode indicator light.
   1. When the ignition switch is turned to ON, check that the AWD lock mode indicator light comes on and goes off within approximately 4 seconds.

      HINT: 

      If the AWD lock mode indicator light do not illuminate, check for combination meter assembly and CAN communication system DTCs, since the 4WD ECU assembly and combination meter assembly are connected by the CAN communication line.

      If the AWD lock mode indicator light does not come on, perform relevant troubleshooting procedures. The relevant troubleshooting procedures are in the sections listed in the table below.

      Trouble Area	See Procedure
      AWD lock indicator light (Does not come on)	Refer to PROBLEM SYMPTOMS TABLE [12/2013 - 11/2016]