Bendix EC-60 UDS 156 / SPN 2622 FMI 3 — Hill Start Assist solenoid shorted to voltage

Code Details

Plain-English Meaning

The EC-60 detected a short to voltage in the hill start assist (HSA) solenoid circuit. HSA briefly holds brake pressure after the driver releases the pedal to prevent rollback when starting on a grade. A fault here disables HSA.

The Bendix EC-60 table maps UDS code 156, blink code 12-24, J1587 094-03, and J1939 SPN 2622 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

• HSA disabled — vehicle may roll back when starting on a grade before drive engagement
• ATC/ESP lamp may be on
• ABS continues to operate normally
• Scan tool shows Bendix EC-60 UDS 156 / SPN 2622 FMI 3

Possible Causes

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

• HSA solenoid wiring contacting a voltage source
• Failed HSA solenoid coil
• Corroded or loose connector in the HSA circuit
• Harness damage at a flex point near the HSA valve location

First Checks

• Unplug the HSA solenoid connector and measure coil resistance.
• Measure from the solenoid wire to battery voltage to confirm the short.
• Inspect connector and nearby harness for damage.
• After repair, clear and test HSA function on a grade.

Can I Keep Driving?

ABS, ATC, and ESP brake-system codes should be handled conservatively. Normal base braking continues when ABS or stability functions are disabled, but the safety benefit of anti-lock and stability intervention is not available. If a brake warning lamp, red stop indicator, loss of braking performance, steering concern, or uncharacteristic vehicle behavior appears alongside this code, stop safely and follow OEM or fleet guidance before continuing.

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