Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM100000001D09P
Model Year Start: 2019 Model: GR Corolla Prod Date Range: [06/2018 - 11/2022]
Title: NAVIGATION / MULTI INFO DISPLAY: NAVIGATION SYSTEM: B15AD; Navigation Processor Malfunction; 2019 - 2023 MY Corolla Corolla Hatchback Corolla HV GR Corolla [06/2018 - 11/2022]

DTC

B15AD

Navigation Processor Malfunction

DESCRIPTION

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

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

B15AD

Navigation Processor Malfunction

When either condition below is met:

  • A short to ground, short to +B or open occurs in the gyro signal circuit
  • Gyro sensor malfunction

Navigation ECU

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.

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

REPLACE NAVIGATION ECU 2019 - 2020 MY Corolla Corolla Hatchback Corolla HV GR Corolla [06/2018 - 03/2019]; NAVIGATION / MULTI INFO DISPLAY: NAVIGATION ECU: REMOVAL 2020 - 2023 MY Corolla Corolla Hatchback Corolla HV GR Corolla [03/2019 - 11/2022]; NAVIGATION / MULTI INFO DISPLAY: NAVIGATION ECU: REMOVAL