Bendix EC-60 UDS 110 / SPN 1808 FMI 2 — YRS Gradient Error

Code Details

Plain-English Meaning

The EC-60 detected a gradient error from the yaw rate sensor — the sensor's output is changing at a rate that exceeds what is physically possible for a truck under any real driving condition. A signal changing too quickly points to electrical noise, a failing sensor producing transient spikes, or a mechanical impact event rather than actual vehicle rotation. The EC-60 logs this condition because sudden large apparent yaw-rate changes could otherwise trigger erroneous ESP brake interventions.

The Bendix EC-60 table maps UDS code 110, blink code 22-04, J1587 103-02, and J1939 SPN 1808 FMI 2 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

• ESP/stability lamp on; code may be stored rather than continuously active
• ESP may have activated or suppressed unexpectedly just before the fault was stored
• ABS and ATC continue normally
• Code may correlate with specific road events — potholes, railroad crossings, rough surfaces — or appear randomly
• Fault may be intermittent rather than persistent

Possible Causes

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

• Electrical noise spike on the YRS CAN circuit or supply line producing a momentary false reading that appears as an instantaneous step change
• YRS physically impacted by a road hazard — a real, rapid angular velocity change from a severe bump can exceed the gradient threshold
• Loose YRS connector intermittently dropping and reconnecting, generating an apparent step-change in the signal
• Failing sensor internal electronics producing noise bursts that manifest as gradient violations
• High-current switching nearby (hydraulic pumps, electric motors, alternator load dump) coupling into the sensor CAN harness

First Checks

• Determine whether the fault correlates with a specific road event — if it appears consistently over a certain surface and not others, mechanical vibration or road input is the likely trigger.
• Inspect the YRS connector and harness mounting for looseness or proximity to high-current wiring.
• Use Bendix ACOM live data to observe YRS output over time — a sensor with occasional noise spikes looks very different from a smooth signal that had one large road-input event.
• Check for alternator AC ripple (above 0.1 V) or aftermarket equipment that could couple interference into the sensor CAN segment.
• If the fault persists without obvious road correlation and with clean harness/connector, sensor replacement is the next diagnostic step.

Can I Keep Driving?

A stability sensor fault (yaw rate, steering angle, or lateral acceleration) disables ESP stability intervention while leaving ABS and ATC intact. The vehicle handles as it would without electronic stability control. Drive with that in mind — cornering, evasive maneuvers, and braking on slippery surfaces carry a higher risk. Stability sensor faults should be addressed before returning the vehicle to regular line-haul or severe-weather service.

Related Lookup Pages

• FMI 2 explanation
• Bendix manufacturer hub
• ABS / ATC / ESP fault codes
• ABS Light symptom page
• Brake Warning Light symptom page
• Search this code