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Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 112 (Smart Key System (For Start, HV) - Diagnostic Codes (2 Of 2) & Symptom Tests (1 Of 2)) >> SMART KEY SYSTEM (for Start Function, HV Model) >> Power Source Mode does not Change to ON (READY) [11/2023 - ] >> Description

Power Source Mode does not Change to ON (READY) [11/2023 - ]: Description

WARNING: This page is about a different variant/trim than selected.

When the electrical key transmitter sub-assembly is in the cabin and the power switch is pressed, the certification ECU (smart key ECU assembly) receives a signal and changes the power source mode. Additionally, when the shift position is in P and the brake pedal is depressed, the hybrid control system can be started by pressing the power switch.

RELATED DATA LIST AND ACTIVE TEST ITEMS

Problem Symptom Data List and Active Test
Power source mode does not change to ON (READY) Power Source Control 
  • Stop Light Switch
  • Shift P Signal
  • Power Supply Condition

Smart Key 

  • Immobilizer
  • S Code Check
  • L Code Check