Shut-Off Valve Fault Code Set In Engine Control Module (ECM/DME) (12 20 99)

Publication date: 1999-08-01
Reference number: 12 20 99

SHUT-OFF VALVE FAULT CODE SET IN ENGINE CONTROL MODULE (ECM/DME)

TECHNICAL SERVICE BULLETIN

Reference Number(s): 12 20 99, Date of Issue: August, 1999

BMW:	MZ3 - with S52 engine produced 2/98 - 9/98
GROUP:	12 - Engine Electrical

SUBJECT

Shut-off Valve Fault Code Set in Engine Control Module (ECM/DME)

SITUATION

Customer complains that the "Check Engine" lamp is illuminated and the following fault is set in the Engine Control Module (ECM/DME):

FC 253 - Shut-off valve, activated charcoal filter jammed shut.

CAUSE

Tank pressure sensor voltage threshold within DME program is set too high.

CORRECTION

The overall operation of the system should be checked and the DME reprogrammed if no faults are found in the system.

PROCEDURE

Using DIS verify that the shut-off valve is operating correctly.
1. - Select "4 Expert mode"
2. - Select "3 Test modules"
3. - Select "60 Shutoff valve, activated charcoal filter"
Check that the vent line from the charcoal canister is not blocked or restricted.
Reprogram the DME, if no other problems have been found with the system.

After successfully reprogramming the control module the following part number for a "programmed control module" will be displayed on the DME ID screen of the DIS or MODIC:

CONTROL MODULE PART NUMBERS

Model	P/N Basic Control Module	P/N Programmed Control Module
M Roadster	1406464	7830287

NOTE: If the customer is also complaining that the engine runs rough during the first few minutes of engine operation following initial cold start then a manual determination must be performed and a specific set of part numbers must be entered. (refer to TECHNICAL SERVICE BULLETIN 12 02 99 )

WARRANTY INFORMATION

Parts and labor will be reimbursable under the terms of the applicable BMW Emissions or New Vehicle Limited Warranty.

WARRANTY INFORMATION

Defect Code	Labor Operation	Labor Allowance
12 14 94 96 00	12 14 710	6 FRU