Normal Operation and Fault Conditions

The ABS module carries out self tests during operation, the module also monitors various inputs and compares the values to what should be expected. If the values received are out of range, are not what is expected, or if any of the self tests fail, the ABS module sets a DTC.

PPT Y ABS MODULE DTC FAULT TRIGGER CONDITIONS

DTC	Description	Fault Trigger Conditions
C1B11:71	Pressure Control Valve: Actuator Stuck	Sets when the ABS module detects an unwanted opening or closing of the pressure control valve. This is most likely due to an internal failure of the HCU.
P0604:8F	Internal Control Module Random Access Memory (RAM) Error	After each ignition on or software reset a test pattern is written to the ABS module RAM. The RAM is read and compared with the written test pattern. A failure is detected if a RAM cell and the estimated test pattern value differs.
P1177:64	Synchronization: Signal Plausibility Failure	The ABS module monitors the linear actuation motor during operations. The rotational speed and current of the motor is monitored when the motor is spinning-down. If the information is not within specifications or if there is no motor movement, this DTC is set.
U3000:00	Control Module: No Sub Type Information	Sets when the ABS module detects an internal fault.
U3000:04	Control Module: System Internal Failure	Sets when the ABS module detects an internal fault.
U3000:41	Control Module: General Checksum Failure	Sets when the ABS module detects an internal fault.
U3000:49	Control Module: Internal Electronic Failure	Sets when the ABS module detects an internal fault.
U3000:4B	Control Module: Over Temperature	Sets when the ABS module detects excessive temperature within the ABS module.
U3000:96	Control Module: Component Internal Failure	Sets when the ABS module detects an internal fault.
U3012:68	Control Module Improper Wake-up Performance: Event Information	Sets when the voltage to the ABS module unexpectedly drops below the minimum operational voltage and then increases back to normal operational voltage. When this occurs, the electric brake booster and HCU assembly may need to relearn the 'zero position'. This can take up to 20 seconds. This fault is recoverable if the system voltage returns to normal and the HCU is able to relearn the 'zero position'.