DTC Quick Navigation
TECHNICAL INSTRUCTIONS
SAFETY RECALL 21TA04
POTENTIAL INCREASED BRAKING DISTANCE
CERTAIN 2020 – 2021 MODEL YEAR SUPRA VEHICLES
TOOLS & EQUIPMENT
- Techstream ADVi (TSADVUNIT)
- Battery Diagnostic Tool (DCA-8000P)
- Toyota Supra Diagnostic Cable (01018-00118)
BACKGROUND
Software inside the vehicle’s computers are reprogrammed using Toyota ISTA. Reprogramming of ECUs via Toyota ISTA requires that the software version of all the vehicle ECUs to be unified; therefore, reprogramming is always carried out for all ECUs.
It is not possible to select a target ECU and then reprogram it individually. Always follow the directions of this document when carrying out reprogramming work in order to prevent any potential damage to the ECUs due to by communication errors, voltage drops, or other problems.
The subject vehicles are manufactured by BMW. According to BMW, the subject vehicles have been equipped with an engine management software that, under certain specific engine start conditions, could damage a component that provides braking power assistance. In this condition, there could be a loss in the brake assist and an increase in stopping distance. This can lead to an increased risk of a crash.
OVERVIEW OF WORK PROCEDURE (REPROGRAMMING USING ISTA)
Software inside the vehicle’s computers are reprogrammed using Toyota ISTA. Reprogramming of ECUs via Toyota ISTA requires that the software version of all the vehicle ECUs to be unified; therefore, reprogramming is always carried out for all ECUs.
It is not possible to select a target ECU and then reprogram it individually. Always follow the directions of this document when carrying out reprogramming work in order to prevent any potential damage to the ECUs due to by communication errors, voltage drops, or other problems.