Emissions - Engine Ventilation Heating DTC Stored in DME

SI M12 02 12
Engine Electrical Systems

April 2013
Technical Service

This Service Information bulletin supersedes SI M12 02 12 dated January 2012.

[NEW] designates changes to this revision

SUBJECT
[NEW] N16 and N18 Engine: Engine Ventilation Heating Faults Stored in DME Fault Memory After Programming

MODEL
[NEW] R55

[NEW] R56

[NEW] R57

[NEW] R58

[NEW] R59

[NEW] R60

[NEW] SITUATION
After reprogramming the vehicle to integration level R056-11-11-503 (ISTA/P P45.1.3.0) or higher, one of the following fault codes are stored in the DME fault memory:

Vehicles with N16 engine:

^ 2F42 Engine ventilation heating, Control

The Service Engine Soon lamp is not illuminated.

Vehicles with N18 engine:

^ 37DE Engine ventilation, heating, triggering: open circuit

The Service Engine Soon lamp is illuminated.

CAUSE
Due to a DME software change, the diagnostic monitoring capability is improved for the engine ventilation heating system. However, a fault will be stored in the fault memory because the engine ventilation heater circuit has a malfunction currently present.

PROCEDURE
[NEW] Follow the applicable test plan for the fault stored. If the test plan is inconclusive, manually verify the integrity of the circuit using the wiring schematic and its component locations in ISTA/D. Use the following path to view the engine ventilation heating circuit schematic:

1. Function Structure

2. 01 Drive

3. MEV Engine Electronics

4. Engine oil

5. Engine-venting Heating

6. Start Search

7. Select (SSP) Engine Oil Supply

[NEW] Troubleshooting hints:

^ Verify that all connections in the system are properly connected.

^ Verify that the crankcase ventilation heater relay (P/N 61 36 8 373 700) is installed in its proper location using the ISTA/D installation location.

^ The total circuit resistance when operating properly is approximately 12.5-15.5 Ohm.

WARRANTY INFORMATION

Not applicable.