Vehicle Speed Input
DESCRIPTIONThe Anti-Lock Brake System (ABS) Vehicle Speed Input Signal uses two sets of variable reluctance speed sensors (two front and two rear) to determine vehicle speed. Four anti-lock sensor indicators (one each wheel) rotate past each wheel speed sensor. The signal generated is proportional to wheel speed and is sent to the anti-lock brake control module. A vehicle speed signal is then broadcast by the anti-lock brake control module on the Standard Corporate Protocol (SCP) Data Link to the powertrain control module as a vehicle speed input signal.
SYMPTOMS
Harsh engagements, firm shift feel, abnormal shift schedule, unexpected downshifts may occur at closed throttle. Torque converter clutch will not engage. Elevated EPC pressures.
DTC's
P0500, P1500, P0503, U1039