Bosch ME7.1.1

This section is underdevelopment. Feel free to add content.

Reading, writing and checksums

For reading and writing procedures refer to Reading and writing ECU (ME7.1.1)

Most flashing tools fix checksums automatically, if you wish to fix them manually, you can use LSuite

Definition file can be found here. If you are getting started with tuning with recommend consulting : Introduction to tuning

Terminology (Acronyms)

Maps and variables names are identified under acronyms. Knowing some of them will be useful and will help you remember map names.

Here is a list of the useful ones.

List of acronyms

Acronym	German	English
A	Auslaßnockenwelle aktiv	Exhaust camshaft active
AB	Abregelfaktor	Derating factor for acceleration signal
AL	Adaptation Lastbereich	Adaptation load range
ASR		Anti-slip regulation
BB	Betriebsbedingungen	Operating conditions
BG	Berechnete Große	Calculated variable
BTS	Bauteilschutz	Component protection
CW		Code word
DFPM	Diagnose-Fehlerpad-Managers	Diagnostic Faulth Path Manager
DK	Drosselklappe	Throttle valve
DS-S		Pressure sensor (MAP) on intake manifold
E	Ersatzwert	Substitute value
ESUK	Einspritzung Ubergang Kompensation	Injection transition compensation
FA	Fahrer	Driver
FGR	FahrgeschwindigKeitsregler	Cruise control
FK	Faktor	Factor
FUEREG	Fullungreglers	Filling regulators
HFM		Hot failm air mass sensor
KF	Kennfeld	Map
KL	Kennlinie	Curve
KN	Klopfereignis	Knock event
KR	Klopfregelung	Knock control
KRA	KR-adaptation	KR-Adaptation
KUPPL	Kupplung	Clutch
KW	Kurbelvelle Grad	Crankshaft degrees
LL	Leerlauf	Idle
LLK	Leerlauf und geoffneter kupplung	Idle and open clutch
LLRBB	Leerlaufregelung Betriebs dedingungen	Idle control operating conditions
LU	Laufunruche	Unstediness / roughness
LUAR	Laufunruhe-Abstandsmass-Referenzwert	Rough running distance measure value
LUR	Laufunruche-Referenzwert	Rough running reference value
MBVH	Missbrauchverginderung	Abuse prevention
MI	Motormoment indiziertes	Indicated torque
ML	Motor Luftmassendurchsatz	Engine air mass flow
MN		Minimum
MS	Massenstrom	Mass flow
MX		Maximum
N	Normierter	Normalized / NM
NW	Nockenwellen	Camshafts
NWS	Nockenwellengsteverrung	Camshaft control
OP	Optimales	Optimal
PVD	Pressure vor Drosselklappe	Pressure in front of DK
RL	relative Luft	Relative air filling (load)
RLMIN	Relative mimale Luft	Relative minimal air (filling)
SA	Schubabschatten	Fuel cut-off / overrun
SOL	Soll	Should
SW	Schlechtwegstrecke	Rough road
TPKHFM	TemperaturKorrektur HFM	Temperature correction HFM
TUM	Umgebungstemperator	Ambient temperature
TV		Delay time
UGD	Ungedroselt	Unthrottled
V	Verzogert	Delayed
WDK	DK-Winkel	DK angle
WKR	Winkelspatverstellung	Angle retard KR
WL	Warmlauf	Warm up
ZUL	Zulassig	Allowed limit
ZW	Zundungs Winkel	Ignition angle

Engine management

The ME7.1.1 use a ST10F275 micro-controller. This set it apart from most ME7 ecus that use the Infineon C167_SR.

There are no public funktionsrahmen for the ME7.1.1. You will have to refer to the following funktionsrahmen : ME7.5 Funktionsrahmen, MED9.1 Funktionsrahmen and MED17.5 Funktionsrahmen

For the fuel injection and knock control system, you can refer to ME7.5 / MED9.1 FR.

Intake manifold pressure schemes are will be found on the MED17.5 FR.

Most other modules will be based on the MED9.1 architecture.

This ecu is load-dependent. Most map works with the requested load or the actual load.

Disabling DTC

The DTC are stored under error class that are defined in a "DTC table". The index at which a certain error class/DTC is stored in the DTC table can be calculated with a simple formula.

Before getting started, you should define the following address that you will use for calculations:

• CDC (CARB codes, OBD2 generic) start address : CDCAAA
• CDK (Kundle (Customer) / Manufacturers codes) : CDKAAA
• CLA (Error class aka DTC table) : CLAAAA

You can use the .A2L file that match your ECU:

In this case the CDC start address would be 0xE59C2. (The offset of 0x800000 has been substracted from the address)

Once the start address are defined, we can proceed to the calculation of the DTC index.

For generic codes (Starts with P0XXX):

We will use the table CDC

For manufacturer code:

We will use the table CDK

Finding the index

Let's assume we want to remove the code P0302, this is a generic code, so we will be using the table CDC.

In WinOLS (or your map editor of choice), set the view in 16bits, FF, LoHi

Go to (Control-G) the start address of CDC, in this example it would be 0xE59C2

Search for an hexadecimal (using Control-F) with the DTC code : 0302

You should see 0302 repeating 4 times, we want the address of the first occurence of the block of 4. If you see a block of 6, ignore the first two occurences.

The address of the first occurence of 0302 would be 0xE5DE2.

Now to get the index we use this formula :

Index = (address of the first occurence - start address of the table) / 8

In our example it would be :

(0xE5DE2 - 0xE59C2) / 8 = 0x84

Index is 0x84

Locating the error class in the CLA table

Using the start address provided by CLAAAA, use the following formula:

CLA error class address = CLA start address (CLAAAA) + index

In our example it would be :

CLA error class address = 0xE05B1 + 0x84 = 0xE0635

The address 0xE0635 contains the error class for the DTC P0302.

To disable the DTC set the byte at the address 0xE0635 to 0.