Toyota Yaris 1.4 D-4D EDC17CP07 0281015393 1037504226 P552V111 DPF+LSU-off.bin
Understand the Toyota Yaris 1.4 D-4D Bosch EDC17CP07 firmware identifiers and the DPF and LSU modification labels.
DPF+LSU-off identifies this Toyota Yaris 1.4 D-4D file as a modified engine-control calibration associated with disabling diesel particulate filter and LSU sensor functions. In practice, those changes can alter how the engine computer monitors the exhaust aftertreatment system and reports related faults.
Engine controller and calibration identification
The catalog entry names a Bosch EDC17CP07 diesel engine control unit, or ECU. This controller manages engine operation by processing sensor signals and controlling functions such as fuel injection, boost and emissions-related systems. Its decisions affect starting, power delivery, fuel consumption and exhaust emissions.
The filename also carries the identifiers 0281015393, 1037504226 and P552V111. Together with the Yaris 1.4 D-4D and EDC17CP07 labels, they distinguish this record from other Bosch diesel firmware files. They should be considered together rather than treating an EDC17CP07 family match as proof that a file belongs to a particular ECU.
What DPF+LSU-off means
The DPF is the exhaust filter that captures soot from a diesel engine. In a functioning system, the ECU monitors conditions relevant to the filter and manages regeneration, the process that burns accumulated soot. A DPF-off modification generally changes the software's treatment of those functions.
LSU refers to a wideband exhaust oxygen sensor. Its signal can help the ECU assess combustion and exhaust conditions. The LSU-off label indicates a modification associated with that sensor's monitoring or use. The filename alone does not establish every map changed or whether either component has been physically removed.
This is a modified variant, not a stock firmware label. Disabling emissions monitoring can conceal faults and may make the vehicle unsuitable for road use where functioning emissions controls are required. A diagnostic assessment should distinguish software changes from an underlying sensor, wiring or exhaust-system fault.