N16 And N18 Engine: Engine Ventilation Heating Faults Stored In DME Fault Memory After Programming (M12 02 12)

N16 AND N18 ENGINE: ENGINE VENTILATION HEATING FAULTS STORED IN DME FAULT MEMORY AFTER PROGRAMMING

TECHNICAL SERVICE BULLETIN

SUBJECT

N16 and N18 Engine: Engine Ventilation Heating Faults Stored in DME Fault Memory After Programming 

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. One of the following may be the cause:

• Loose or defective electrical connection
• Missing or defective crankcase ventilation heater relay

PROCEDURE

1. 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. The total circuit resistance when connected properly is approximately 12.5-15.5Ω.
2. If an electrical connection is found loose then correct the connection and retest the system.
3. Check the installation location of crankcase ventilation relay P/N 61 36 8 373 700. This relay may be missing or installed in the wrong location. Verify the proper relay location using the ISTA/D component locations and install it in the correct location.
4. After correcting connections, installing or replacing components verify that faults no longer exist in DME fault memory by performing a vehicle test.

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

WARRANTY INFORMATION

As recommended in the "Procedure" section, if the ISTA diagnostics and the related test plans, or performing other troubleshooting for the listed causes results in an eligible and covered repair(s), claim this work with the applicable defect code(s) and labor operations listed in KSD2.