900 S Convertible L4-2290cc 2.3L DOHC EFI (1997)
Rough Road Sensor: Description and Operation
The sensor is located beside the main fuse box on the left in the engine bay. It is bolted directly to the car body.
Tightening torque: 2.5 Nm
The sensor is supplied with 5 V from control module pin 59 and grounded via pin 71.
The sensor applies a voltage, which varies with vertical changes in motion, to pin 80 of the control module. Normally 2.5 V, this voltage changes at the
rate of 0.4 V/g (1 g = 9.81 m/sq. secs)
The control module utilizes the voltage to block diagnosis of misfiring when driving on rough roads as per erroneous detection of misfiring could
otherwise occur. This function is used solely for the OBD II system.
