Engine Controls - Poor/Fluctuating Idle After Start Up

SI M12 01 11
Engine Electrical Systems

August 2011
Technical Service

This Service Information bulletin supersedes SI M12 01 11 dated April 2011.

[NEW] designates changes to this revision

SUBJECT
N16 - Poor or Fluctuating Idle After an Engine Start

MODEL
R55, R56, R57, and R60 with the N16 engine produced 10/21/10 to 12/1/2010

SITUATION

The engine idle quality is rough or fluctuating after the engine is started.

This can occur regardless of engine temperature, but may be more noticeable when cold.

[NEW] No DME faults are stored and only cars at a current integration level of R056-10-11-511 are affected.

CAUSE

DME software error

[NEW] CORRECTION

Do not replace any parts.

Vehicle test

Note:
When the ISTA system message displays:

Battery voltage only "XX.XX" V. Please connect charger.

Please note the displayed battery voltage reading in the repair order comments section.

The DME software solution was introduced into production (integration R056-10-11-512) beginning in December 2010.

Using only ISTA/D 2.26 or newer, please complete the test modules under the following path:

Activities / Information search / Functional structure / 01 Drive / MEV engine electronics / [!] Current fault patterns / Engine jerking and/or idle speed fluctuations








WARRANTY INFORMATION