Engine Controls - ECM Programming Data Update: Overview

Group 12
Engine Electrical

Bulletin Number
12 07 94 (4116)

Woodcliff Lake, NJ
June 1995
Product Engineering

This Service Information bulletin supersedes S.I. 12 07 94 (4116) dated January 1995; please remove it from your S.I. binder and discard.

Asterisks are used to identify changes which have been made to this revision.

YOU SHOULD PERFORM THE PROCEDURE OUTLINED IN THIS SERVICE INFORMATION BULLETIN WHENEVER AN AFFECTED VEHICLE IS IN THE SHOP FOR MAINTENANCE OR REPAIR.

SUBJECT:
Programming Data Update for M50 Engines

MODELS:
E34, E36 with M50 (TU) produced from 9/92 to 8/94 (with VANOS)

Situation:
Vehicles within the production range listed may be affected by one or more of the following conditions:

^ Engine will start primarily during cold weather (32°F or lower) or at high altitudes, in conjunction with the following symptoms:

- Long cranking time, engine will not start
- Engine starts but runs rough, black smoke coming from exhaust
- Spark plugs are "wet"

^ Check Engine light is illuminated in conjunction with:

- Fault code 13 - Oxygen Sensor failure

Vehicles Affected:
In order to determine if a specific vehicle is affected by this Service Action, it will be necessary to utilize the "Service Menu" of the DCS (Dealer Communications System). Based on the response of the system, either proceed with the corrective action or take no further action.





The Chassis Number Ranges listed below are only for informational purposes and are not to be considered as the only deciding factor.

Correction:
When an affected vehicle is next in the workshop perform a data update using the latest MoDiC software version currently available.

1. Prior to starting the programming update, check for and correct existing DME faults. Once all faults have been corrected and cleared, the update can be performed.

- If fault code 13 is present, replace the oxygen sensor and claim using regular warranty procedures. A diagnostic printout must accompany all parts sent to the WPRC.

2. Follow the procedure indicated if the information displayed on the DME identification screen of the DIS or MoDIC matches the following:

Bosch Hardware Number 0 261 200 413

3. For reliable cold start performance it is also essential that the correct spark plugs are installed.

Refer to S.I. 12 03 85 (1085) for spark plug application.

4. Always ensure that an approved engine oil with a viscosity matching the ambient operating temperature range of the vehicle is used.

Refer to S.I. 11 08 94 (4139) for recommended oil viscosities and the operating fluids manual for approved engine oils.