Module for calibrating firmware of Bosch EDC17CP45 control units for BMW diesel cars.
File size up to 4 MB is supported.
The following can be modified:
Air mass: desired air mass flow rate with and without exhaust gas recirculation system, maximum air mass flow rate, air mass correction
Turbocharging control: basic boost controller duty cycle, in regeneration mode, in dual injection mode, with exhaust gas recirculation system disabled, maximum boost controller duty cycle
Turbo pressure: turbo pressure limit, desired base turbo pressure, in regeneration mode, in dual injection mode, with EGR disabled, with bypass closed
DPF: DPF enable/disable, regeneration search masks, exhaust gas sensor scaling and test conditions.
EGR control: thresholds for EGR enable/disable
EGT sensors: EGT sensor scaling, switches and test conditions
Injection: injection quantity from torque conversion maps, injector opening time, post-injection quantity
Rail pressure: base rail pressure, at idle, rail pressure limiters, P, I components for flow regulator, injection flow regulator map, rail pressure regulator maps
Start: engine speed after start, starting torque, minimum engine speed
Injection start: base injection start angle for main injection, time component between Pi1 and Pi2
Target lambda for smoke limitation
Torque limitation: torque limitation, internal/external torque, powertrain torque, conditional torque limitation based on EGT, exhaust gas pressure, fuel temperature, torque limitation in case of system errors.
Torque control: torque limitation in monitoring mode, accelerator pedal for control
Required torque: required torque from accelerator pedal base, required torque correction factors based on coolant temperature and atmospheric pressure.
Error code mask editor
To use the module, you need to purchase a BitEdit USB protection key . The key can be purchased in our store. An unlimited number of modules can be purchased for one key.
Updates of descriptions for new software versions within the module are free.
Module activation is done within 1 hour on business days (usually 10-15 minutes). Activation may be delayed on weekends and holidays (up to 2 hours).
Only the serial number of the key and email are required to activate the module.
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From this point onward, the order cannot be canceled, edited, corrected, or refunded.
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We do not guarantee the listed functions because we are not the developer.
4. Accuracy of Product Information
Module and script descriptions are provided directly by the manufacturer.
IOBD.io is not responsible for any inaccuracies, missing details, or differences between the description and actual operation.
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IOBD.io sells professional automotive diagnostic software and equipment.
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These products are intended for users with basic technical knowledge in automotive diagnostics.
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incorrect installation
unsupported or incompatible hardware
improper configuration
third-party interference
Important:
This function is available only on certain BMW engines and is NOT applicable to other vehicle brands.
The information below applies only to stock engines with factory ECU software and a standard exhaust system.
What This Parameter Actually Represents
This is NOT a direct measurement of fuel octane and is NOT a direct octane reading calculated by the ECU.
The value is an adaptation factor ranging from 0 to 1, where:
- 0 = no correction
- 1 = maximum correction
According to BMW’s internal definition:
Faktor adaptierte Kraftstoffqualität (0 = ROZ98 / 1.0 = ROZ91)
- 0 corresponds to 98 ROZ
- 1.0 corresponds to 91 ROZ
ROZ is the German equivalent of RON (Research Octane Number).
The device converts this multiplier into a more intuitive octane value for user convenience.
⚠️ The device does not measure anything itself.
It only displays the data provided by the engine control unit (ECU).
How the ECU Evaluates Fuel Quality
Each ECU has different calibration sensitivity:
- Sensitivity to the adaptation factor
- Sensitivity of the knock control system
Fuel quality is evaluated subjectively by the ECU, primarily based on:
- Knock ignition timing corrections
- Overall engine noise levels
BMW G-Series & LCI F-Series (B-Engines)
B38 / N63 / S63 / N74
These engines are highly sensitive to octane adaptation.
- During warm-up and cruising, the displayed octane may frequently drop to 95 or lower.
- This does NOT automatically indicate poor fuel quality.
- Under load, the value should increase.
⚠️ If the value continues to decrease under load, this may indicate a problem.
B46 / B48 / B58
These engines have low sensitivity.
- During cruising, octane will typically display maximum values even with mediocre fuel.
- Under load, the value will decrease if fuel quality is truly poor.
S58
Octane correction is virtually inactive.
- It will typically always show 98.
- If it drops below 98, fuel quality is genuinely very poor.
BMW F-Series (Pre-LCI) with N/S Engines
Most pre-LCI F-series ECUs do not calculate octane adaptation.
Do not expect this parameter to function.
S55
- Octane parameter not used by the system
- Display not supported
- However, display of the last 5 refueling quality events is supported
S63
- Octane parameter not used
- Display not supported
- Refueling quality display not supported
BMW E-Series
Octane parameter not available. Display not supported.
Important Notes About Tuned Vehicles
With modified hardware or custom tuning, behavior may vary significantly. Always consult your tuner regarding expected operation.
Key principles:
- If octane drops under load, it means fuel quality is worse than expected under those conditions.
- This does NOT automatically mean the fuel itself is bad.
Examples:
- If a tuner increases ignition timing and boost pressure, even good fuel may cause knock corrections, and the ECU may interpret it as poor fuel.
- Thin-walled or poorly mounted exhaust systems may create parasitic noise, which the ECU may interpret as engine knock, causing negative correction.
- Conversely, if knock sensitivity is reduced or octane correction is disabled in tuning, readings may appear ideal while actual engine safety is compromised.
