The bulletin describes a troubleshooting and repair procedure for various issues affecting certain model year 2020-2022 Lexus vehicles, including the ES 350, ES 300h, UX 200, and UX 250h. These issues may include diagnostic trouble codes, inoperative systems, and connectivity problems. The procedure involves using Techstream software and the Data Communication Module (DCM) to reset and update the firmware. The issues addressed in this bulletin include:
Exhibited Conditions
- DTC B15A804 is present in current or history
- Red SOS LED stays on after bulb check
- Lexus app does not accept the activation code
- Lexus app is inoperative
- SOS call center does not receive the vehicle’s location in timely manner
- Lexus app shows an error 42 when trying to execute a command
- Unable to remote start the vehicle with the key fob (if equipped)
Warranty Information:
This repair is covered under the Lexus Basic Warranty. The warranty is in effect for 48 months or 50,000 miles, whichever occurs first, from the vehicle’s in-service date.
Required tools and equipment include:
- Techstream ADVI or Techstream Lite software
- Essential SST (Battery Diagnostic Tool)
The procedure should only be performed by a qualified technician with the necessary training and equipment.
Manual:
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