Bendix EC-60 UDS 35 / SPN 627 FMI 3 — Battery Voltage Too High

Code Details

Plain-English Meaning

The EC-60 measured supply voltage above its acceptable upper limit. Over-voltage can damage the module's internal electronics and the solenoid coils it drives, so the system logs this condition to alert the technician that the charging system is out of range.

The Bendix EC-60 table maps UDS code 35, blink code 06-02, J1587 251-03, and J1939 SPN 627 FMI 3 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 high RPM or heavy charging load
• Other modules on the same bus may set high-voltage codes simultaneously
• Intermittent if the voltage regulator is only failing under certain conditions
• In severe cases, solenoid coil damage may occur alongside the voltage fault

Possible Causes

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

• Failed alternator voltage regulator allowing uncontrolled output above 15–16 V
• Poor ground between alternator and battery causing a floating reference voltage
• Aftermarket charging equipment (inverters, chargers) introducing voltage spikes
• Recent battery or alternator replacement with incorrect output specification
• Wiring fault connecting an ignition-switched circuit to battery voltage

First Checks

• Measure battery voltage with engine running at various RPMs — above 15 V consistently indicates a regulator problem.
• Check charging output under load (lights, HVAC, PTO) to catch a regulator that fails only under heavy draw.
• Inspect for aftermarket accessories wired directly to the battery or charging system.
• Verify all battery and alternator ground connections are clean and tight.
• After correcting charging voltage, clear codes and verify EC-60 hardware was not damaged.

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