Grand Caravan V6-3.8L VIN L (2007)
indicator lamp and disable the antilock braking system. The normal base braking system will remain operational.
NOTE: If the vehicle is equipped with traction control, the TRAC OFF lamp will illuminate anytime the amber ABS warning indicator lamp
illuminates.
The ABM continuously monitors the speed of each wheel through the signals generated by the wheel speed sensors to determine if any wheel is
beginning to lock. When a wheel locking tendency is detected, the ABM commands the ABM command coils to actuate. The coils then open and close
the valves in the HCU that modulate brake fluid pressure in some or all of the hydraulic circuits. The ABM continues to control pressure in individual
hydraulic circuits until a locking tendency is no longer present.
The ABM contains a self-diagnostic program that monitors the antilock brake system for system faults. When a fault is detected, the amber ABS warning
indicator lamp is turned on and the fault diagnostic trouble code (DTC) is then stored in a diagnostic program memory. A latched fault will disable
certain system functionality for the current ignition cycle. An unlatched fault will disable certain system functionality until the fault condition disappears.
These DTC's will remain in the ABM memory even after the ignition has been turned off. The DTC's can be read and cleared from the ABM memory by
a technician using a scan tool. If not cleared with a scan tool, the fault occurrence and DTC will be automatically cleared from the ABM memory after
the identical fault has not been seen during the next 3,500 miles. Drive-off may be required for the amber ABS warning indicator lamp to go out on the
next ignition cycle.
ABM INPUTS
-
Wheel speed sensors (four)
-
Brake lamp switch
-
Ignition switch
-
System and pump voltage
-
Ground
-
Traction control switch (if equipped)
-
Diagnostic communication (PCI)
ABM OUTPUTS
-
Amber ABS warning indicator lamp actuation (via BUS)
-
Red BRAKE warning indicator lamp actuation (via BUS)
-
Instrument cluster (MIC) communication (PCI)
-
Traction control lamps (if equipped)
-
Diagnostic communication (PCI, via BUS)
