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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) [10/2021 - 11/2023] >> Description

Power Source Mode does not Change to ON (READY) [10/2021 - 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 lever is in P and the brake pedal is depressed, the hybrid control system can be started by pressing the power switch. The hybrid control system can also be started by pressing the power switch with the shift lever in P and the brake pedal depressed.

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 Switch1
  • Shift P Signal
  • IG Relay Monitor (Inside)
  • IG Relay Monitor (Outside)
  • Latch Circuit
  • Starter Request Signal
  • Power Supply Condition

Smart Key 

  • Immobilizer
  • Engine/System Start Request
  • L Code Check
  • S Code Check
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