Stratus L4-2.0L VIN C (1997)
ABS Main Relay: Description and Operation
ABS System Relays
System Relay And Pump Motor Relay Box
SYSTEM RELAY
The main purpose of the system relay is to put the Antilock Brake System (ABS) into a stand-by mode for ABS operation. The System Relay is
energized by the Controller Antilock Brake (CAB) shortly after the ignition switch is turned on.
When Energized - by the CAB, the System Relay turns off the ABS warning lamp and provides 12 volts to the CAB. This voltage can then be
used by the CAB to energize the Decay Solenoids during ABS braking. When energized, the System Relay also provides the Pump/Motor Relay
coil with 12 volts. The ground path to the Pump/Motor Relay is completed by the CAB during ABS braking.
When De-energized - the ABS warning lamp is illuminated, voltage to the Decay Solenoids is cut off, and the Pump/Motor Relay is prevented
from energizing. Typically, the System Relay is de-energized by the CAB when a fault is detected that requires turning ABS off.
