Last Modified: 08-21-2023 6.11:8.1.0 Doc ID: RM100000001B2NX
Model Year Start: 2019 Model: Avalon HV Prod Date Range: [04/2018 - 08/2020]
Title: THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, HV Model): PROBLEM SYMPTOMS TABLE; 2019 - 2020 MY Avalon HV [04/2018 - 08/2020]

PROBLEM SYMPTOMS TABLE

HINT:

  • Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.
  • Inspect the fuses and relays related to the system before inspecting the suspected areas below.
  • If the problem occurs in certain locations or times of day, the possibility of wave interference is high.
  • If a malfunction occurred after optional components were installed by the dealer, check if there is wave interference from the components.

Smart Key System (for Start Function, HV Model)

Symptom

Suspected Area

Link

Power source mode does not change to on (IG) or on (ACC)

Smart key system (for Entry Function, HV Model)

2019 - 2022 MY Avalon HV [04/2018 -        ]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, HV Model): Power Source Mode does not Change to ON (IG and ACC)

Wireless charging system*1

Affected by wave interference

Transmitter battery

Electrical key transmitter sub-assembly

No. 1 indoor electrical key antenna assembly (front floor)

No. 1 indoor electrical key antenna assembly (rear floor)

Power switch

Wire harness or connector

Instrument panel junction block assembly

Certification ECU (Smart key ECU assembly)

Power source mode does not change to on (IG)

Wire harness or connector

2019 - 2022 MY Avalon HV [04/2018 -        ]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, HV Model): Power Source Mode does not Change to ON (IG)

Relay

Instrument panel junction block assembly

Certification ECU (Smart key ECU assembly)

Power source mode does not change to on (ACC)

Wire harness or connector

2019 - 2022 MY Avalon HV [04/2018 -        ]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, HV Model): Power Source Mode does not Change to ON (ACC)

Relay

Instrument panel junction block assembly

Certification ECU (Smart key ECU assembly)

Power source mode does not change to ON (READY)

Hybrid control system

2019 - 2020 MY Avalon HV [04/2018 - 08/2020]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, HV Model): Power Source Mode does not Change to ON (READY)

Immobiliser function

Steering lock function

Wire harness or connector

Shift lock control unit assembly

Stop light switch assembly

Certification ECU (Smart key ECU assembly)

New key cannot be registered

LIN communication system

2019 - 2022 MY Avalon HV [04/2018 -        ]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, HV Model): New Key cannot be Registered

Meter / gauge system

Reregistration

Electrical key transmitter sub-assembly

Steering lock ECU (Steering lock actuator or upper bracket assembly)

Certification ECU (Smart key ECU assembly)

Additional key cannot be registered

Steering lock function

2019 - 2022 MY Avalon HV [04/2018 -        ]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, HV Model): Additional Key cannot be Registered

Electrical key transmitter sub-assembly

Certification ECU (Smart key ECU assembly)

New key registration warning message is not displayed

Lighting system (int)

2019 - 2022 MY Avalon HV [04/2018 -        ]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, HV Model): New Key Registration Warning Message is not Displayed

Meter / gauge system

Certification ECU (Smart key ECU assembly)

Unable to unlock steering wheel (hybrid control system cannot start)

Wire harness or connector

2019 - 2022 MY Avalon HV [04/2018 -        ]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, HV Model): Unable to Unlock Steering Wheel (Hybrid Control System cannot Start)

Steering lock ECU (Steering lock actuator or upper bracket assembly)

Certification ECU (Smart key ECU assembly)

Steering lock does not lock

Lighting system (int)

2019 - 2022 MY Avalon HV [04/2018 -        ]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, HV Model): Steering Lock does not Lock

Wire harness or connector

Steering lock ECU (Steering lock actuator or upper bracket assembly)

Certification ECU (Smart key ECU assembly)

Security indicator light does not blink

Wire harness or connector

2019 - 2022 MY Avalon HV [04/2018 -        ]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, HV Model): Security Indicator Light Does not Blink

Security indicator light (Radio and display receiver assembly)

Main body ECU (Multiplex network body ECU)

Certification ECU (Smart key ECU assembly)

Immobiliser system does not operate properly

Communication ID registration was defective

2019 - 2020 MY Avalon HV [04/2018 - 08/2020]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, HV Model): Immobiliser System does not Operate Properly

Wire harness or connector

Hybrid vehicle control ECU

Hybrid control system cannot be started by remote air conditioner with remote start (Both the wireless door lock control system and push-button start function operate normally)*2

Refer to "Remote Engine Starter does not Operate"

2019 - 2020 MY Avalon HV [04/2018 - 08/2020]; TELEMATICS: TELEMATICS SYSTEM (for HV Model): Remote Engine Starter does not Operate

  • *1: w/ Wireless Charging System
  • *2: for Toyota Entune Remote Connect Compatible Type