Forum Technique Associatif de DarkGyver

16 01 99 (455)
Carbon canister blocked
E38/E39, all except dieselComplaint: - When driving, distracting noises such as rumbling and cracking may come from the area of the fuel tank.

- Loud suction noises may occur when the tank lock is opened.

- The fuel supply may fail if the fuel pump is damaged due to contact with the fuel tank.

Cause: Due to extreme ambient conditions (smog, high air humidity, etc.), the carbon canister may block up. This will impair the ventilation of the fuel tank and so will lead to the development of a vacuum in the fuel tank. These issues are interlinked and will cause the stated complaints.
Affected vehicles:E38/E39 ?????????????, all except diesel Production period: Series introduction up to 09/99
Procedure:In the event of a complaint, install an carbon canister with a modified filter fleece. Due to the modified pore size, this filter fleece will prevent the carbon canister from becoming blocked.

Replacement of the carbon canister see Repair instructions 16 12 010.

In series production, the carbon canister will be installed with the modified filter fleece from 09/99.
Parts: Designation
Part number

1 x carbon canister (with modified filter fleece)
16 13 6 752 623

Reimbursement: Material and labour costs incurred can be claimed through the usual warranty channels subject to current warranty terms.

Defect code16 13 90 14 00
This defect code is not contained in the official defect code catalogue but has been included in the system,

Install carbon canister with modified filter fleece:
Job number16 12 010 Flat rate unitsE38/E39 without self-levelling suspension: 5 FRUs
E38 with self-levelling suspension: 9 FRUs
Warranty type1Warranty stage 1 (within vehicle warranty) 2 (outside vehicle warranty) Invoicing is limited to 36 months/100,000 km and expires in June 2001 .

16 00 100Checking fuel tank and tank venting system for leaks (petrol/gasoline without tank leakage diagnosis module) Special tools required:

13 3 010
16 1 070
16 1 171
16 1 174
Necessary preliminary tasks:

Remove rear right wheel arch trim

The following procedure is only applicable to vehicles without the tank leak diagnosis module.
Comply with the following conditions in order to obtain plausible test results:
- Content of fuel tank:
Maximum 90 %
Minimum 13 % (reserve telltale must not light up).
- Park the car in the workshop at least 2 hours before the test so that the fuel temperature is approximately that of the workshop temperature
(ideal fuel temperature approx. 10...20 °C).

Disconnect line to evaporation strainer (1) from carbon canister.
Important!

Risk of breakage!
Carefully remove evaporation strainer from carbon canister.


Using special tool 16 1 070, seal opening (2) for evaporation strainer on carbon canister.
Remove fuel filler cap and connect special tool 16 1 174 to fuel filler neck.
Clamp special tool 16 1 174 on fuel filler neck with adjusting wheel (1).
Important!

Turn pressure regulator on special tool 16 1 171 counterclockwise up to stop.

Connect special tool 16 1 171 using compressed air line (1) to garage compressed air system (8...10 bar).
Connect pressure sensor (2) from Diagnosis and Information System with a measuring range of 0...25 bar.
Important!

Do not yet connect fast-release coupling (3) of special tool 16 1 171.

Select ”Measurement” function on Diagnosis and Information System (DIS).
Using pressure regulator on special tool 16 1 171, increase pressure by 0.20 bar.
Connect special tool 16 1 174 to fast-release coupling of special tool 16 1 171.
Wait until the value at the Diagnosis and Information System has levelled out.
Using pressure regulator on special tool 16 1 171, reset gauge pressure in fuel tank to 0.20 bar.
Important!

Do not under any circumstances increase pressure by more than 0.30 bar as this would result in damage to the fuel tank and venting system.

Using special tool 13 3 010, disconnect delivery line from special tool 16 1 171 to fuel filler neck.
Allow a rest period of approx. 20 secs.
Read off and note down starting pressure value.
Wait approx. 120 secs.
Read off final pressure value and compare with starting pressure value.
Measurement evaluation:
- Pressure drop up to 0.01 bar:
System OK

- Pressure drop over 0.02 bar:
System leaking beyond permitted levels


If the system is leaking, a leak test must be carried out and the defective components replaced.