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Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 129 (Smart Key System (For Start, HV) - Symptom Tests (2 Of 2)) >> SMART KEY SYSTEM (for Start Function, HV Model) >> Unable to Unlock Steering Wheel (Hybrid Control System cannot Start) [12/2019 - 10/2021] >> Description

Unable to Unlock Steering Wheel (Hybrid Control System cannot Start) [12/2019 - 10/2021]: Description

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

The steering lock actuator or upper bracket assembly activates the steering lock motor and moves the lock bar into the steering column to lock the steering.

The steering may not unlock when the lock bar gets stuck in the lock hole of the steering column. In this case, if the ignition switch is turned to ON while shaking the steering wheel, as is done for a vehicle with a mechanical key, the lock bar will be unlocked. If the ID code box (immobilizer code ECU) or hybrid vehicle control ECU is replaced, the system needs to be initialized. Otherwise, the steering cannot be unlocked and the hybrid control system cannot be started.

RELATED DATA LIST AND ACTIVE TEST ITEMS

Problem Symptom Data List Item Active Test Item
Unable to unlock steering wheel (Hybrid control system cannot start) Smart Key 
  • Unlock Request Receive
  • S Code Check
  • L Code Check
  • Steering Unlock
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