Bendix EC-60 UDS 88 / SPN 1807 FMI 9 — SAS CAN Timeout

Code Details

Plain-English Meaning

The EC-60 is not receiving CAN messages from the steering angle sensor within the expected time window. The SAS transmits its measurements over the sensor CAN network; a timeout means that link is interrupted or the sensor has stopped transmitting. The EC-60 cannot determine the driver's intended steering direction for ESP yaw-correction, so stability intervention functions that depend on steering angle are suspended.

The Bendix EC-60 table maps UDS code 88, blink code 21-08, J1587 089-09, and J1939 SPN 1807 FMI 9 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; steering-angle-dependent ESP functions suspended
• ABS and ATC continue to operate normally
• Code is typically persistent until communication is physically restored
• If the SAS and YRS share a CAN segment or supply, both may timeout simultaneously
• No physical steering change — the loss is in the electronic data path only

Possible Causes

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

• CAN wire between SAS and EC-60 damaged, corroded, or disconnected — no physical link means no data
• SAS supply voltage or ground fault preventing the sensor from powering up and transmitting
• Corroded or partially unseated SAS connector breaking the CAN path
• Failed SAS CAN transceiver — sensor is powered but its communication circuit is no longer functional
• CAN bus load fault from another module on the same sensor CAN segment blocking SAS messages

First Checks

• Inspect the SAS connector and CAN wiring from the sensor back to the EC-60 for damage, corrosion, or disconnected pins.
• Measure supply voltage and ground at the SAS connector with ignition on; no power means no CAN output.
• Check whether other sensor codes appeared simultaneously — if YRS and LAS are also timing out, the fault is in a shared supply or backbone.
• If accessible, measure CAN Hi to CAN Lo resistance at the SAS connector; significantly above 60 Ω indicates a missing termination or bus fault.
• After restoring the physical connection, clear codes and verify the SAS is visible and reporting in Bendix ACOM live data.

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 9 explanation
• Bendix manufacturer hub
• ABS / ATC / ESP fault codes
• J1939 fault codes
• ABS Light symptom page
• Brake Warning Light symptom page
• Search this code