Bendix EC-60 UDS 131 / SPN 627 FMI 14 — Input Voltage Excessive Noise (Latched)

Code Details

Plain-English Meaning

The EC-60 detected excessive electrical noise on the power supply — rapid voltage fluctuations that interfere with normal operation, not simply high or low voltage. This version latches and requires a deliberate clear; the noise persisted long enough for the EC-60 to lock out ABS.

The Bendix EC-60 table maps UDS code 131, blink code 06-09, J1587 251-14, and J1939 SPN 627 FMI 14 to this ABS/ATC/ESP diagnostic entry. The Bendix source indicates an ABS and/or ATC/ESP warning lamp can be on for this entry. The EC-60 continuously monitors wheel speed sensor circuits, pressure modulation valve output drivers, supply voltage quality, J1939 network data from the engine and transmission controllers, and internal self-diagnostic routines. When any monitored value falls outside its acceptable range — or a circuit does not respond as the module expects — the EC-60 logs a diagnostic trouble code and may disable the affected ABS, ATC, or ESP function. Bendix ACOM Pro or a compatible diagnostic interface is the required tool for reading live sensor data, running actuator tests, performing calibrations, clearing latched codes, and adjusting EC-60 configuration parameters. Generic J1939 scan tools can read the SPN/FMI but cannot access EC-60-specific live data screens or configuration settings.

Common Symptoms

• ABS and/or ATC/ESP lamp on
• May correlate with specific RPM ranges, electrical loads, or road conditions
• Other modules may show noise-related faults simultaneously
• Code will not clear on its own — requires active clearing with a scan tool after correcting the source
• No apparent change in normal braking feel during noise events

Possible Causes

Possible causes may include the items below. The list is not a parts diagnosis.

• Failing alternator diode letting AC ripple onto the DC bus (most common cause)
• Poor battery or chassis ground allowing ground-loop noise
• Aftermarket electronics (inverters, lighting controllers) generating conducted EMI
• Loose battery terminal creating intermittent resistance and voltage bounce
• Fuel injector or ignition noise coupling into the power supply

First Checks

• Measure AC ripple on the battery with engine running — more than 0.1 V AC ripple typically indicates a failed alternator diode.
• Check all battery and chassis ground connections for tightness and corrosion.
• Identify recently added aftermarket electronics and test with them disconnected.
• Inspect alternator output wiring and mounting — a loose alternator can introduce vibration-related noise.
• After identifying and correcting the noise source, clear the code with Bendix ACOM; the latch prevents self-clearing.

Can I Keep Driving?

Power supply faults suspend ABS and stability functions while the voltage condition persists — normal hydraulic or air base braking continues unaffected. If the vehicle is experiencing voltage-related issues, other safety systems may also be affected. Have the charging system and battery evaluated alongside the ABS repair — a recurring power fault that is cleared without addressing the root cause may produce intermittent loss of anti-lock protection without warning.

Related Lookup Pages

• FMI 14 explanation
• Bendix manufacturer hub
• ABS / ATC / ESP fault codes
• ABS Light symptom page
• Brake Warning Light symptom page
• Search this code