Toyota Yaris 89661-52220 Bosch EDC15C9 Diesel ECU Firmware

The 89661-52220 firmware entry belongs to the Bosch EDC15C9 engine control unit for a Toyota Yaris P10 with the 1.4-liter 1ND-TV D-4D diesel engine, rated at 55 kW or 75 PS. This ECU controls diesel fuel injection and coordinates engine management, affecting how the engine starts, responds to the accelerator and delivers power.

What the EDC15C9 controls

The EDC15C9 is an electronic diesel control module. It uses information from engine sensors and driver inputs to calculate fuel delivery and injection timing across operating conditions. On the Yaris D-4D, those decisions help the common-rail diesel engine run from cold start through normal driving and acceleration.

Engine management also involves monitoring operating conditions and recording faults when supported components or signals do not behave as expected. In practical diagnostics, the ECU and its stored fault information are one part of investigating symptoms such as difficult starting, poor response or reduced performance. Those symptoms can also have mechanical or fuel-system causes.

Identifying this catalog file

The catalog names the file Yaris (P10) 1.4L 8V D-4D (1NDTV) 55kW_75PS BOSCH EDC15C9 0281010563 89661-52220 1037362666.bin. It combines the vehicle and engine description with Bosch controller number 0281010563, Toyota part number 89661-52220 and the listed identifier 1037362666.

These identifiers distinguish the entry from other Yaris diesel ECU files. The filename does not name a stock or modified variant, nor does it describe a particular calibration change. The ECU's general injection-control role therefore should not be taken as evidence of a specific performance modification or revision benefit in this file.