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Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> HEADUP Display System - Diagnostics - Introduction >> HEADUP Display System >> Problem Symptoms Table [12/2019 - ] >> Problem Symptoms Table [12/2019 - ]

Problem Symptoms Table [12/2019 - ]

NOTE:

When replacing the combination meter assembly, always replace it with a new one. If a combination meter assembly which was installed to another vehicle is used, the information stored in it will not match the information from the vehicle and a DTC may be stored.

HINT: 

HEADUP DISPLAY SYSTEM

Symptom Suspected Area Link
Headup display is not displayed
(Steering pad switch is normal)
Wire harness or connector -
Read the Data List
(Display Change Switch)
Refer to DATA LIST / ACTIVE TEST [12/2019 - ] 
Meter mirror sub-assembly Refer to REMOVAL [12/2019 - 10/2022] , or refer to REMOVAL [10/2022 - 11/2023] , or refer to REMOVAL [11/2023 - ]
Combination meter assembly Refer to REMOVAL [12/2019 - ]
Brightness of the headup display does not change
(Steering pad switch is normal)
Read the Data List
(Brightness Up Switch, Brightness Down Switch)
Refer to DATA LIST / ACTIVE TEST [12/2019 - ] 
Perform Active Test
(Display Brightness)
Refer to DATA LIST / ACTIVE TEST [12/2019 - ] 
Meter mirror sub-assembly Refer to REMOVAL [12/2019 - 10/2022] , or refer to REMOVAL [10/2022 - 11/2023] , or refer to REMOVAL [11/2023 - ]
Combination meter assembly Refer to REMOVAL [12/2019 - ]
Display position of the headup display does not change
(Steering pad switch is normal)
Read the Data List
(Projection Position Up Switch, Projection Position Down Switch)
Refer to DATA LIST / ACTIVE TEST [12/2019 - ] 
Perform Active Test
(Display Position)
Refer to DATA LIST / ACTIVE TEST [12/2019 - ] 
Meter mirror sub-assembly Refer to REMOVAL [12/2019 - 10/2022] , or refer to REMOVAL [10/2022 - 11/2023] , or refer to REMOVAL [11/2023 - ]
Combination meter assembly Refer to REMOVAL [12/2019 - ]
Headup display is not displayed in the correct position or is difficult to see Headup display position initialization Refer to UTILITY [12/2019 - ] 
Check customize parameters Refer to CUSTOMIZE PARAMETERS [12/2019 - ] 
Read the Data List
(Display Angle)
Refer to DATA LIST / ACTIVE TEST [12/2019 - ] 
Perform Active Test
(Display Position)
Refer to DATA LIST / ACTIVE TEST [12/2019 - ] 
Meter mirror sub-assembly Refer to REMOVAL [12/2019 - 10/2022] , or refer to REMOVAL [10/2022 - 11/2023] , or refer to REMOVAL [11/2023 - ]
Combination meter assembly Refer to REMOVAL [12/2019 - ]
Individual segments or entire display is not displayed
(Other systems are normal)
Perform Active Test
(Color Test Screen (Black), Color Test Screen (White), Color Test Screen (Red), Color Test Screen (Green), Color Test Screen (Blue), Color Test Screen (Color Bars))
Refer to DATA LIST / ACTIVE TEST [12/2019 - ] 
Meter mirror sub-assembly Refer to REMOVAL [12/2019 - 10/2022] , or refer to REMOVAL [10/2022 - 11/2023] , or refer to REMOVAL [11/2023 - ]
Combination meter assembly Refer to REMOVAL [12/2019 - ]
Illumination is always dark or does not dim at night
(Lighting system (EXT) is normal)
Meter mirror sub-assembly Refer to REMOVAL [12/2019 - 10/2022] , or refer to REMOVAL [10/2022 - 11/2023] , or refer to REMOVAL [11/2023 - ]