Last Modified: 08-21-2023 6.11:8.1.0 Doc ID: RM100000001BTBE
Model Year Start: 2019 Model: Avalon HV Prod Date Range: [04/2018 -           ]
Title: NAVIGATION / MULTI INFO DISPLAY: NAVIGATION SYSTEM (for HV Model): B15C0,B15C1; GPS Antenna Connection Malfunction(short); 2019 - 2022 MY Avalon HV [04/2018 -        ]

DTC

B15C0

GPS Antenna Connection Malfunction(short)

DTC

B15C1

GPS Antenna Connection Malfunction(break)

DESCRIPTION

These DTCs are stored when a malfunction occurs in the navigation antenna assembly.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

B15C0

GPS Antenna Connection Malfunction(short)

Navigation antenna malfunction

  • Navigation antenna assembly
  • No. 4 antenna cord sub-assembly
  • No. 5 antenna cord sub-assembly
  • Navigation ECU

B15C1

GPS Antenna Connection Malfunction(break)

Navigation antenna power source malfunction

  • Navigation antenna assembly
  • No. 4 antenna cord sub-assembly
  • No. 5 antenna cord sub-assembly
  • Navigation ECU

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

  • When replacing the navigation ECU, always replace it with a new one. If a navigation ECU which was installed to another vehicle is used, the following may occur:
    • A communication malfunction DTC may be stored.
    • The navigation ECU may not operate normally.
  • Check that the No. 4 antenna cord sub-assembly and No. 5 antenna cord sub-assembly is properly installed and does not have any sharp bends, pinching or loose connections before performing following procedure.

    Click here 2019 - 2022 MY Avalon Avalon HV [04/2018 -        ]; INTRODUCTION: HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS: HOW TO PROCEED WITH TROUBLESHOOTING

PROCEDURE

1.

CHECK DTC

(a) Clear the DTCs.

Body Electrical > Navigation System > Clear DTCs

(b) Recheck for DTCs and check that no DTCs are output.

Body Electrical > Navigation System > Trouble Codes

OK:

No DTCs are output.

OK

USE SIMULATION METHOD TO CHECK

NG

2.

INSPECT NO. 5 ANTENNA CORD SUB-ASSEMBLY

(a) Remove the No. 5 antenna cord sub-assembly.

Click here 2019 - 2020 MY Avalon Avalon HV [04/2018 - 08/2020]; NAVIGATION / MULTI INFO DISPLAY: ANTENNA CORD: REMOVAL 2021 - 2022 MY Avalon Avalon HV [08/2020 -        ]; NAVIGATION / MULTI INFO DISPLAY: ANTENNA CORD: REMOVAL

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

C-1 - D-1

Always

Below 1 Ω

C-1a - D-1a

Always

Below 1 Ω

C-1 or D-1 - Body ground

Always

10 kΩ or higher

*a

Component without harness connected

(No. 5 Antenna Cord Sub-assembly)

NG

REPLACE NO. 5 ANTENNA CORD SUB-ASSEMBLY 2019 - 2020 MY Avalon Avalon HV [04/2018 - 08/2020]; NAVIGATION / MULTI INFO DISPLAY: ANTENNA CORD: REMOVAL 2021 - 2022 MY Avalon Avalon HV [08/2020 -        ]; NAVIGATION / MULTI INFO DISPLAY: ANTENNA CORD: REMOVAL

OK

3.

INSPECT NO. 4 ANTENNA CORD SUB-ASSEMBLY

(a) Remove the No. 4 antenna cord sub-assembly.

Click here 2019 - 2022 MY Avalon Avalon HV [04/2018 -        ]; AUDIO / VIDEO: RADIO ANTENNA CORD: COMPONENTS

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

A-3 - B-1

Always

Below 1 Ω

A-3a - B-1a

Always

Below 1 Ω

A-3 or B-1 - Body ground

Always

10 kΩ or higher

*a

Component without harness connected

(No. 4 Antenna Cord Sub-assembly)

NG

REPLACE NO. 4 ANTENNA CORD SUB-ASSEMBLY 2019 - 2021 MY Avalon Avalon HV [04/2018 - 08/2021]; AUDIO / VIDEO: RADIO ANTENNA CORD: REMOVAL 2022 MY Avalon Avalon HV [08/2021 -        ]; AUDIO / VIDEO: RADIO ANTENNA CORD: REMOVAL

OK

4.

INSPECT NAVIGATION ANTENNA ASSEMBLY

(a) Remove the navigation antenna assembly.

Click here 2019 - 2020 MY Avalon Avalon HV [04/2018 - 08/2020]; NAVIGATION / MULTI INFO DISPLAY: NAVIGATION ANTENNA: REMOVAL 2021 MY Avalon Avalon HV [08/2020 - 08/2021]; NAVIGATION / MULTI INFO DISPLAY: NAVIGATION ANTENNA: REMOVAL 2022 MY Avalon Avalon HV [08/2021 -        ]; NAVIGATION / MULTI INFO DISPLAY: NAVIGATION ANTENNA: REMOVAL

(b) Inspect the navigation antenna assembly.

Click here 2019 - 2020 MY Avalon Avalon HV [04/2018 - 08/2020]; NAVIGATION / MULTI INFO DISPLAY: NAVIGATION ANTENNA: INSPECTION 2021 - 2022 MY Avalon Avalon HV [08/2020 -        ]; NAVIGATION / MULTI INFO DISPLAY: NAVIGATION ANTENNA: INSPECTION

OK

REPLACE NAVIGATION ECU 2019 - 2020 MY Avalon Avalon HV [04/2018 - 08/2020]; NAVIGATION / MULTI INFO DISPLAY: NAVIGATION ECU: REMOVAL 2021 - 2022 MY Avalon Avalon HV [08/2020 -        ]; NAVIGATION / MULTI INFO DISPLAY: NAVIGATION ECU: REMOVAL

NG

REPLACE NAVIGATION ANTENNA ASSEMBLY 2019 - 2020 MY Avalon Avalon HV [04/2018 - 08/2020]; NAVIGATION / MULTI INFO DISPLAY: NAVIGATION ANTENNA: REMOVAL 2021 MY Avalon Avalon HV [08/2020 - 08/2021]; NAVIGATION / MULTI INFO DISPLAY: NAVIGATION ANTENNA: REMOVAL 2022 MY Avalon Avalon HV [08/2021 -        ]; NAVIGATION / MULTI INFO DISPLAY: NAVIGATION ANTENNA: REMOVAL