DSD Information System
Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis >> Accessories & Equipment >> Seats >> Seat Heater System - Diagnostics - Introduction >> Seat Heater System >> Diagnosis System [12/2019 - 11/2023] >> Diagnosis System [12/2019 - 11/2023]

Diagnosis System [12/2019 - 11/2023]

  1. DESCRIPTION 
    1. Seat heater system data and Diagnostic Trouble Codes (DTCs) can be read through the Data Link Connector 3 (DLC3) of the vehicle. When the system seems to be malfunctioning, use the GTS to check for malfunctions and perform repairs.
  2. CHECK DLC3 
    1. Check the DLC3.

      Refer to GENERAL INFORMATION [12/2019 - ]

  3. INSPECT AUXILIARY BATTERY VOLTAGE 
    1. Measure the auxiliary battery voltage with the ignition switch off.*1
    2. Measure the auxiliary battery voltage.*2
      1. *1: for HV Model
      2. *2: for Gasoline Model

      Standard Voltage

      11 to 14 V

      If the voltage is below 11 V, recharge or replace the auxiliary battery.