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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 (IG) [12/2019 - 11/2023] >> Description

Power Source Mode does not Change to ON (IG) [12/2019 - 11/2023]: Description

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

If the power switch is pressed with the electrical key transmitter sub-assembly in the cabin, the certification ECU (smart key ECU assembly) receives a signal and changes the power source mode.

RELATED DATA LIST AND ACTIVE TEST ITEMS

Problem Symptom Data List and Active Test
Power source mode does not change to ON but does change to ACC Power Source Control 
  • Power Supply Condition
  • IG Relay Monitor (Inside)
  • IG Relay Monitor (Outside)
  • IG Circuit
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