Pinpoint Test Y: Abs (Anti-Lock Brake System) Module Internal Fault Concern: Notes

WARNING: This page is about a different car, the 2021 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.

Refer to VEHICLE DYNAMIC SYSTEMS for schematic and connector information.

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.

REFER to: Anti-Lock Brake System (ABS) and Stability Control - System Operation and Component Description .

DTC Fault Trigger Conditions

DTC	Description	Fault Trigger Condition
ABS C101F:49	Generic Valve Failure: Internal Electronic Failure	Sets when the ABS module detects an internal fault.
ABS C1A08:1C	Pressure Sensor Supply: Circuit Voltage Out Of Range	Sets when the ABS module detects an internal fault.
ABS C1A99:01	Pressure Sensor: General Electrical Failure	This DTC indicates the brake fluid line hydraulic pressure sensor signal circuit located inside the ABS module has failed.
ABS C1A99:28	Pressure Sensor: Signal Bias Level Out Of Range/Zero Adjustment Failure	This DTC indicates the brake fluid line hydraulic pressure sensor located inside the HCU has failed.
ABS C1A99:49	Pressure Sensor: Internal Electronic Failure	This DTC indicates the brake fluid line hydraulic pressure sensor located inside the HCU has failed.
ABS U3000:00	Control Module: No Sub Type Information	Sets when the ABS module detects an internal fault.
ABS U3000:04	Control Module: System Internal Failures	Sets when the ABS module detects an internal fault.
ABS U3000:41	Control Module: General Checksum Failure	Sets when the ABS module detects an internal fault.
ABS U3000:44	Control Module: Data Memory Failure	Sets when the ABS module detects an internal fault.
ABS U3000:45	Control Module: Program Memory Failure	Sets when the ABS module detects an internal fault.
ABS U3000:47	Control Module: Watchdog/Safety μC Failure	Sets when the ABS module detects an internal fault.
ABS U3000:48	Control Module: Supervision Software Failure	This DTC is for informational purposes only and sets in conjunction with other ABS module Diagnostic Trouble Codes (DTCs).
ABS U3000:49	Control Module: Internal Electronic Failure	Sets when the ABS module detects an internal fault.
ABS U3000:4B	Control Module: Over Temperature	Sets when the ABS module detects excessive temperature within the ABS module.
ABS U3000:96	Control Module: Component Internal Failure	Sets when the ABS module detects an internal fault.

Possible Sources

Incorrect sensor input
Stuck valve
ABS module and HCU assembly
ABS module