Last Modified: 04-05-2023 6.11:8.1.0 Doc ID: RM100000000VJJV
Model Year Start: 2016 Model: Sienna Prod Date Range: [12/2015 -           ]
Title: THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM(for Entry Function): DIAGNOSTIC TROUBLE CODE CHART; 2016 - 2020 MY Sienna [12/2015 -        ]

DIAGNOSTIC TROUBLE CODE CHART

HINT:

If a trouble code is stored during the DTC check, inspect the trouble areas listed for that code. For details of the code, refer to the "See page" below.

Certification ECU (Smart Key ECU Assembly)

DTC Code

Detection Item

Trouble Area

See page

B27A1

Open in Driver Side Electrical Antenna Circuit

1. Front door outside handle assembly (for driver side)

2. Certification ECU (smart key ECU assembly)

3. Wire harness or connector

2016 - 2020 MY Sienna [12/2015 -        ]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM(for Entry Function): B27A1; Open in Driver Side Electrical Antenna Circuit

B27A2

Open in Front Passenger Side Electrical Antenna Circuit

1. Front door outside handle assembly (for front passenger side)

2. Certification ECU (smart key ECU assembly)

3. Wire harness or connector

2016 - 2020 MY Sienna [12/2015 -        ]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM(for Entry Function): B27A2; Open in Front Passenger Side Electrical Antenna Circuit

B27A5

Open in Front Floor Electrical Key Oscillator Circuit

1. Indoor electrical key oscillator (for front floor)

2. Certification ECU (smart key ECU assembly)

3. Wire harness or connector

2016 - 2020 MY Sienna [12/2015 -        ]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM(for Entry Function): B27A5; Open in Front Floor Electrical Key Oscillator Circuit

B27A6

Open in Rear Floor Electrical Key Oscillator Circuit

1. Indoor electrical key oscillator (for center floor)

2. Certification ECU (smart key ECU assembly)

3. Wire harness or connector

2016 - 2020 MY Sienna [12/2015 -        ]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM(for Entry Function): B27A6; Open in Rear Floor Electrical Key Oscillator Circuit

B27A7

Open in Inside Luggage Compartment Electrical Key Oscillator Circuit

1. Indoor electrical key oscillator (for rear floor)

2. Certification ECU (smart key ECU assembly)

3. Wire harness or connector

2016 - 2020 MY Sienna [12/2015 -        ]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM(for Entry Function): B27A7; Open in Inside Luggage Compartment Electrical Key Oscillator Circuit

B27A8

Open in Outside Luggage Compartment Electrical Key Antenna Circuit

1. Outside electrical key oscillator (for rear side)

2. Certification ECU (smart key ECU assembly)

3. Wire harness or connector

2016 - 2020 MY Sienna [12/2015 -        ]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM(for Entry Function): B27A8; Open in Outside Luggage Compartment Electrical Key Antenna Circuit