Wheel Speed Signal Conditioner Module

The wheel speed signal conditioner module for the L61 application is only equipped on manual transaxle vehicles without antilock brakes. The wheel speed signal conditioner module is located under the driver side I/P, which is orange in color and similar dimensionally to a relay. The module harness is tied to the I/P harness.

Vehicle speed on manual transaxle non-ABS vehicles is received from the right front wheel speed sensor. The wheel speed signal conditioner module is used to convert the A/C voltage of the sensor to a square wave. This is accomplished by pulse width modulating the vehicle speed output circuit to ground, which is pulled up to 5 volts through resistance in the PCM. The PCM interprets the square wave input as vehicle speed.