ASTON MARTIN CLIENT SERVICES

SERVICE BULLETIN
Reference number:

SB-03-0433

Subject:

Procedure to learn engine misfire corrections

Model(s):

DB11 V12, DBS Superleggera

VIN Range:

All

Applicable to:

All Dealers

Distribute to:

After Sales Manager
Executive Manager
Service Manager
Sales Manager

Issued: 28 September, 2018

Warranty Staff
Technician(s)
Parts Staff

Reason for this Service Bulletin
This Service Bulletin gives the procedure for the Engine Management System (EMS) to do the Variable Valve Timing (VVT)
learn procedure, and the engine misfire and fuelling corrections. You must do this procedure when you replace an
Engine Control Module (ECM) or when the EMS software is updated.

Workshop Procedure
Note:

Make sure that the vehicle has a minimum of half a tank of fuel before you do this procedure.

CAUTIONS:

CONNECT A BATTERY CHARGER TO THE VEHICLE BATTERY WHEN YOU DO THE PROCEDURE
THAT FOLLOWS. IF THE VEHICLE BATTERY DISCHARGES DURING THE PROCEDURE, THE
SOFTWARE UPDATE CAN FAIL. THIS CAN CAUSE DAMAGE TO THE ENGINE MANAGEMENT
SYSTEM (EMS).
CONNECT THE AMDS 2.0 EQUIPMENT TO AN ELECTRICAL SUPPLY WHEN YOU DO THE
PROCEDURE THAT FOLLOWS. IF THE LAPTOP BATTERY VOLTAGE DECREASES DURING THE
UPDATE, THE UPDATE CAN FAIL AND CAN CAUSE DAMAGE TO THE MODULE.

Notes:

Make sure that the AMDS 2.0 software has updated to the latest version. The AMDS 2.0 software will
need a good Internet connection (minimum broadband speed of 2 Mbit/second) to make sure that
the software is updated correctly.
A high output battery charger (minimum of 80 A) is necessary to meet the demand of the radiator
cooling fan. The battery charger must also be compatible with Absorbent Glass Mat (AGM) type
batteries.

1.

Put the vehicle key in the Electronic Ignition Switch (EIS). Refer to the Vehicle Owner’s Guide.

2.

Set the ignition to ON but do not start the engine.

3.

Connect the Vehicle Communication Interface (VCI) to the vehicle with the Diagnostic Link Cable (DLC).

CAUTION:

DO NOT START THE ENGINE AFTER YOU HAVE UPDATED THE SOFTWARE FOR THE ENGINE
CONTROL MODULES TO THE LATEST RELEASE. THE ENGINE CONTROL MODULES MUST SHUT
DOWN FULLY BEFORE YOU START THE ENGINE. IF YOU START THE ENGINE, IT WILL NOT
OPERATE CORRECTLY.

28 September, 2018

Page 1 of 3

SERVICE BULLETIN

SB-03-0433

4.

Use AMDS 2.0 to connect to the internet and update the AMDS 2.0 database to the latest release.

5.

Use AMDS 2.0 to update the software for the ECMs to the latest release.

6.

Use AMDS 2.0 to erase the Diagnostic Trouble Codes (DTC).

7.

Use AMDS 2.0 to open the “DID (Data Monitor)” and select the Parameter Identifiers (PID) that follow for both
ECMs:
• “lrnstep_c” (throttle learn counter)
• “fofstat” (fuel off misfire adaption flag)
• “SIGNALS_Virtual_B_nws” (camshaft control active)
• “tmot” (calculated engine temperature)

8.

Set the ignition to OFF.
• The throttle learn procedure starts and the “lrnstep_c” PID value will change to 11.

9.

Remove the vehicle key from the EIS.

10.

Wait at least one minute to let the ECMs fully shut down.

11.

Set the ignition to ON but do not start the engine.

12.

Wait for the “lrnstep_c” PID value to change to 0.

13.

Disconnect the battery charger from the vehicle battery.

14.

Disconnect the AMDS 2.0 equipment from the electrical supply.

15.

Start the engine and prepare to drive the vehicle from the workshop onto the road.

Notes: When possible, use qualified non-Technician Dealer staff or supervisors to drive the vehicle to do EMS
learn procedures (the same as other road test procedures).
If the engine does not start immediately, you must go back to step 8.
16.

Operate the engine at idle speed. This starts the VVT learn procedure.

Notes: The engine must complete the VVT learn procedure before it learns the engine misfire and fuelling
corrections.
For the EMS to complete the VVT learn procedure, the engine temperature must be between 20 degrees
Celsius and 90 degrees Celsius.
17.

When the “SIGNALS_Virtual_B_nws” PID value changes Set on AMDS 2.0, this confirms that the EMS has
completed the VVT learn procedure.

Note:

The engine temperature must be above 50 degrees Celsius for the EMS to start to learn the engine misfire
and fuelling corrections.

18.

Road test the vehicle and manually select third gear. Do not push the “D” button.

19.

Accelerate the vehicle until the engine speed is 4,000 rpm.

Note:
20.

Do not use the brake pedal or the throttle pedal during the step that follows.

Decelerate the vehicle until the engine speed is 1,500 rpm.

28 September, 2018

Page 2 of 3

SERVICE BULLETIN

SB-03-0433

Notes: Keep the engine speed between 4,000 rpm (maximum) and 1,500 rpm (minimum) in the step that follows.
Change the vehicle speed and the engine speed as much as the road conditions allow in the step that
follows.
21.

Keep the vehicle in third gear and accelerate up to 4,000 rpm and then decelerate to 1,500 rpm ten more times.
•

This is necessary until the two “fofstat” (fuel-off status) PIDs show a value of “0”.

•

When the two “fofstat” PIDs show a value of “0”, this confirms that the EMS has learnt the engine misfire
and fuelling corrections.

22.

Drive the vehicle back to the workshop.

23.

Use AMDS 2.0 to do a check and erase DTCs.

24.

Set the ignition to OFF.

Note:

25.

Do not disconnect the battery before the step that follows is complete. If you do, the drive-cycle will not
be saved and you must go back to step 15.

Wait a minimum of 20 minutes to let the ECMs fully shut down.

Warranty Data
Procedure and Labour Time
Description
Module Reflash

Labour Time

ROT Code

0.2 hours

00.06.AH

If you have any questions related to this Service Bulletin, please contact: Aston Martin Technical Services
on: +44 (0) 1926 644720, email: [email protected],
Or contact your After Sales Manager.
The English version of this Service Bulletin is written in
Simplified Technical English to ASD-STE100™.

28 September, 2018

Page 3 of 3