A/T Controls - Jolt/Delay Accelerating From A Stop
SI B24 03 08Automatic Transmission
August 2011
Technical Service
This Service Information bulletin supersedes SI B24 03 08 dated October 2009.
[NEW] designates changes to this revision
SUBJECT
E70, E9x, E6x with 6HP19TU - Jolt and Delay when Pulling Away
MODEL
E90, E92, E93 (335i) with N54 and 6HP19TU from 03/07 up to 06/09
E60, E61 (535i) with N54 and 6HP19TU from 03/07 up to 09/09
E60 (528i) with N52K and 6HP19TU from 03/07 up 09/09
E70 (X5) with N52K and 6HP19TU up to 09/09
SITUATION
The customer may complain of a delayed engagement and a harsh jolt when accelerating from a stop. The situation occurs only during the engine warm-up phase (cold engine), and cannot be reproduced in the Sport Mode.
CAUSE
EGS software - unfavorable NIC calibration
The NIC (Neutral Idle Control) function disengages the torque converter from the transmission when the vehicle is stationary in the Drive position; the service brakes are applied; and the engine is still in the warm-up phase.
SOLUTION
Check the vehicle's integration level.
If the integration level is:
^ On E9x vehicles - E89x-09-03-520 or lower
Reprogram and recode the complete vehicle with a current ISTA/P version (target integration level E89x-09-06-510). The updated EGS software, which completely removes the NIC function, was introduced in ISTA/P 2.34.0.
^ On E60/E61 N54 vehicles - E060-09-03-530 or lower
^ On E60 N52K vehicles - E060-09-03-530 or lower
^ On E70 N52K vehicles - E070-09-03-530 or lower
Reprogram and recode the complete vehicle with a current ISTA/P version (target integration levels are respectively: E060-09-09-510, E070-09-09-520 or higher). The updated EGS software, which completely removes the NIC function, was introduced in ISTA/P 2.35.1.
[NEW] Note: When the ISTA system message displays:
[NEW] Battery voltage only "XX.XX" V. Please connect charger.
[NEW] Please note the displayed battery voltage reading in the repair order comments section.
[NEW] Warranty Information