Pinpoint Test Y: Abs Module Internal Fault Concern
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 is 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 .
The U3000:XX Diagnostic Trouble Codes (DTCs) may set along with other ABS Diagnostic Trouble Codes (DTCs). Diagnose all other ABS module Diagnostic Trouble Codes (DTCs) before diagnosing any ABS module U3000:XX Diagnostic Trouble Codes (DTCs).
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 C1A99:28 | 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 U3000:00 | Control Module: No Sub Type Information | Sets when the ABS module detects an internal hardware fault. |
| ABS U3000:04 | Control Module: System Internal Failures | Sets when the ABS module detects an internal hardware fault. |
| ABS U3000:44 | Control Module: Data Memory Failure | Sets when the ABS module detects an internal hardware fault. |
| ABS U3000:45 | Control Module: Program Memory Failure | Sets when the ABS module detects an internal hardware fault. |
| ABS U3000:46 | Control Module: Calibration/Parameter Memory Failure | Sets when the ABS module detects an internal hardware fault. |
| ABS U3000:47 | Control Module: Watchdog/Safety μC Failure | Sets when the ABS module detects an internal hardware 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 hardware 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 hardware fault. |
Possible Sources
- Incorrect sensor input
- Stuck valve
- EBB unit (vehicles with electric boost)
- ABS module (vehicles with vacuum boost)
PINPOINT TESTS Y: POWERTRAIN CONTROL MODULE (PCM) READ ONLY MEMORY (ROM) FAILURE (Diesel)