Fault Code Stored In Tire Pressure Monitor Control Unit (LI40.15-P-051283)

WARNING: This page is about the Fortwo Electric Drive, 2D Convertible, which is a different variant/trim than selected.

Publication date: 2011-02-03
Reference number: LI40.15-P-051283

FAULT CODE STORED IN TIRE PRESSURE MONITOR CONTROL UNIT

TECHNICAL SERVICE BULLETIN

Reference Number(s): LI40.15-P-051283 Version 1, Date of Issue: February 3, 2011

SMART:	All 451.### with TPMS [RDK], sales code V41, Canada and USA version
DESIGN GROUP:	40.15 Tire pressure/tire pressure monitoring
REASON FOR CHANGE:

COMPLAINT

Customer complains that indicator lamp for tire pressure monitor has lit up.

The tire inflation pressure is OK.

CAUSE

The tire pressure indicator lamp lights up when the tire pressure drops below (>20%) the specified tire minimum pressure.

If the driver has pressed the Reset button without checking the tire pressure, the event 551B (implausible at specified minimum pressure) is stored.

The DAS unit erroneously displays event 551B as a stored fault.

When the tire pressure has been corrected and the Reset button has been pressed, the indicator lamp goes out, but the event is still stored in the control unit.

REMEDY

Ignore fault memory entry

NOTE: Replacing the TPM sensors or the TPM control unit does not remedy the problem.

Cancelation of fault memory output 551B in DAS is planned for mid-2009.

Details are to be added to the function description.

SYMPTOMS

Communication/information/Information display/Displays/Multifunction display/Multifunction display, error messages/Implausible messages despite properly functioning message systems

WIS-REFERENCES

Document number	Title	Note	Allocation
gf40.15-p-0999mcu	Function description of tire pressure monitor	Explanation of stored fault 551B - The specified tire pressure values are implausible: This fault is merely an event. It is stored when the customer presses the Reset button without correcting the tire pressure	Cause