Tank Ventilation And Mixture Control Faults Stored In The DME (SI B13 04 20)

TANK VENTILATION AND MIXTURE CONTROL FAULTS STORED IN THE DME

TECHNICAL SERVICE BULLETIN

MODEL

SERVICE INFORMATION

Vehicles produced up to March 2019 and with the following engine variants:

B36X, B38X, B46X, B48X, B58X, IB1, XB1X

SITUATION

The Engine Malfunction Warning is illuminated and one or more of the following faults are stored in the DME.

All models: 

FC 191C02 - Fuel tank ventilation system, 2^nd discharge point: malfunction

FC 195014 - Differential pressure sensor, tank vent valve, signal: fixed

FC 118001 - Mixture control: mixture too lean

FC 118401 - Mixture control: mixture too lean, large deviation

I01 only: 

FC 124103 - Mixture control: mixture too lean

FC 124101 - Mixture control: Mixture lean, large deviation

CAUSE

Internal mechanical defect in the tank ventilation valve.

The defect can also result in a very loud clicking noise when the valve is cycling.

PROCEDURE

This procedure affects tank ventilation valves with single and dual discharge points.

Single (1)

Dual (2)

1. Inspect the discharge point(s) of the tank ventilation valve using a borescope.

   The valves may have different reed valve designs.

   The reed valve dimple should be centered in the discharge port.

   Note the GREEN  arrow.

   The reed valve in this photo is good  .

   Do not replace the valve.

   OR-

   The reed valve center with vanes should be centered in the discharge port.

   Note the GREEN  arrow.

   The reed valve in this photo is good  .

   Do not replace the valve.

   In this example, the reed valve is dislodged and is no longer centered.

   Note the RED  arrow.

   The valve must be replaced. 

2. If no problems are detected with the valve itself, then the valve must be activated via the applicable test plan for the fault stored. The clicking sound that the valve causes needs to be compared to the video linked below.

   If the clicking resembles the "Good"  sound file, then the valve does not need be replaced.

   If the clicking resembles the "Defective"  sound file, then you must install a new valve (for reference) and activate it before replacing the valve. If the noise is excessive when comparing to the sound file and the new part, then the valve should be replaced.

   Use the vehicle's VIN in ETK to determine what tank ventilation valve part number needs to be used for the sound comparison.

3. Check the vehicle's current I-level by either using AIR or the Key reader/ISPA NEXT application.
   • if the current I level of the vehicle is not already at 16-07-500 or higher  , program the vehicle with the current version of ISTA
4. If a defect is not identified using the steps provided in this bulletin, to perform the applicable test plans for the faults stored in the vehicle.
5. Certain models and engine variants require TeileClearing authorization before the tank ventilation can be replaced. Submit the TeileClearing case with "Tank Ventilation Valve" in the subject line for these vehicles. Submit the case and wait for a response. Refer to B00 03 06 for additional details.

PARTS INFORMATION

Obtain and confirm the part numbers for your specific vehicle by entering the chassis number in either ETK or AIR which takes into account specific equipment and/or options.

Part Number	Description	Quantity
Refer to ETK using the VIN of the vehicle	Tank ventilation valve	1

WARRANTY INFORMATION

Covered under the terms of the BMW New Vehicle Limited Warranty for Passenger Cars and Light Trucks.

Defect Code:	1390011500	Tank ventilation system valve (activated carbon) permanent malfunction
Labor Operation	Description	Labor Allowance
00 00 006	Performing vehicle test (with vehicle diagnosis system - checking faults) (Main work)	Refer to AIR
Or
00 00 556	Performing vehicle test (with vehicle diagnosis system - checking faults) (Plus work)	Refer to AIR
And:
61 21 528	Connect an approved battery charger/power supply (indicated in AIR as Charging battery)	Refer to AIR
And
13 99 000	Performing step 1	2 FRU
Or:
13 99 000	Performing steps 1 and 2	5 FRU
And, if necessary
61 00 730	Programing/encoding control unit(s) (Step 3)	Refer to AIR

And, additionally for the: