Hi, This is for someone who curious what the pendullum
sensor ( the fifth sensor of 4-channel ABS system ).
From Toyota training document, it said the g-force sensor
is for 4WD car such as their Celica GT-4 and Camry 4WD.
It doesn't explained why it is needed in 4WD cars. But
Subaru Legacy 4WD also use this kind of sensor, Audi
quattro use 3-channel system so may be it doesn't have it.
Ben