Bendix EC-60 UDS 95 / SPN 1807 FMI 2 — SAS Signal Reversed

Code Details

Plain-English Meaning

The EC-60 detected that the steering angle sensor's output is oriented backwards — a right-hand turn produces a negative angle and a left-hand turn produces a positive angle, which is the opposite of the standard convention. A reversed SAS direction causes the ESP yaw-correction to respond as if the driver is steering in the wrong direction, potentially applying brake force in opposition to the driver's intended path.

The Bendix EC-60 table maps UDS code 95, blink code 21-05, J1587 089-02, and J1939 SPN 1807 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
• ESP may apply corrections in the wrong direction during a turn if it acts before detecting the reversal
• ABS and ATC continue normally
• Code typically appears after SAS replacement or harness repair involving the sensor wiring
• Sensor electrical output may appear normal on a meter — the fault is polarity, not signal level

Possible Causes

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

• Replacement SAS installed facing the opposite direction from the original — mounting orientation markings indicate correct direction
• CAN High and CAN Low wires swapped at a connector during harness repair, inverting the differential signal
• Wrong part number installed — a sensor from a left-hand-drive or different application with opposite polarity convention
• Harness splice with crossed CAN polarity introduced during a connector repair
• SAS rotated in its mounting bracket — some sensors allow rotational adjustment that should only be within a defined arc

First Checks

• Use Bendix ACOM live data to confirm the signal direction — with the steering wheel turned slightly right, the SAS angle should increase in the positive direction; left turn should read negative (or vice versa per Bendix specification for this application).
• Verify the SAS mounting orientation matches the Bendix installation diagram; direction arrows or marking labels indicate the correct facing direction.
• If orientation looks correct, check CAN Hi and CAN Lo wire assignment at each connector between the SAS and EC-60 for a polarity swap.
• Confirm the part number matches Bendix specification for this vehicle and EC-60 combination.
• After correcting the reversal, perform a fresh SAS calibration and verify signal direction is correct in ACOM before clearing codes.

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