2000 BMW 3 SERIES SEDAN battery

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BMW 3 SERIES SEDAN 2000 E46 MRSIII Multiple Restraint System Manual TABLE OF CONTENTS
Subject Page
Multiple Restraint System (MRS III)  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Components  . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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BMW 3 SERIES SEDAN 2000 E46 MRSIII Multiple Restraint System Manual COMPONENTS
BATTERY SAFETY TERMINAL (BST)
As with previous systems, the BST is used to disconnect the battery’s “B+” connection to
the engine compartment in the event of an airbag deployment. The

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BMW 3 SERIES SEDAN 2000 E46 MRSIII Multiple Restraint System Manual MRS III OPERATION
As with previous systems, the  triggering thresholds are programmed in the MRS III control
module. These thresholds are determined by BMW through  crash and vehicle testing dur-
ing

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BMW 3 SERIES SEDAN 2000 E46 MRSIII Multiple Restraint System Manual 14
TRIGGERING THRESHOLDS
SIDE AIRBAGS/ITS
The triggering thresholds for the side airbags/ITS is dependent on the signals from the
satellite sensors and the crash sensor in the MRS III control module.

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BMW 3 SERIES SEDAN 2000 E46 MRSIII Multiple Restraint System Manual 15
DIAGNOSIS
Diagnosis and troubleshooting of the MRS III system is fault driven and can be accessed
using the DIS Tester or MoDiC. The control module performs a self test of the system every
time the