Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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.
| DTC | Description | Fault Trigger Conditions |
|---|---|---|
| C1A76:49 | Valve Relay: Internal Electronic Failure | This DTC sets when the valve relay circuit feedback does not match the commanded state. |
| C1A77:11 | Valve Relay Supply Circuit: Circuit Short To Ground | This DTC sets when the monitoring detects UVR voltage compared to the UBVR voltage indicates the valve relay has a high impedance short to ground. |
| P0604:94 | Internal Control Module Random Access Memory (RAM) Error: Unexpected Operation | This DTC sets when software execution attempts to access RAM addresses outside specified allowable range. |
| P062F:46 | Internal Control Module EEPROM Error: Calibration/Parameter Memory Failure | This DTC sets when a value is written by the ABS module is written to EEPROM but the value read back is not correct |
| U2007:49 | Valve(s): Internal Electronic Failure | This DTC sets due to an electrical failure (open circuit, short to ground, short to voltage) in one or more of the HCU valve coils. |
| U3000:00 | Control Module: No Sub Type Information | Sets when the ABS module detects an internal fault. |
| U3000:44 | Control Module: Data Memory Failure | Sets when the ABS module detects an internal fault. |
| U3000:45 | Control Module: Program Memory Failure | Sets when the ABS module detects an internal fault. |
| U3000:46 | Control Module: Calibration/Parameter Memory Failure | Sets when the ABS module detects an internal fault. |
| U3000:47 | Control Module: Watchdog/Safety Micro-Controller Failure | Sets when the ABS module detects an internal fault. |
| U3000:48 | Control Module: Supervisor Software 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. |
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.