Bendix EC-60 UDS 84 / SPN 795 FMI 5 — SA Left PMV CMN Open Circuit

Code Details

Plain-English Meaning

The EC-60 detected a open circuit in the common (CMN) supply wire shared by the solenoids in the steer axle left PMV. Both hold and release solenoids share this wire; a fault here disables all modulation in that valve assembly — ABS at that axle is completely unavailable.

The Bendix EC-60 table maps UDS code 84, blink code 07-07, J1587 007-05, and J1939 SPN 795 FMI 5 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 lamp on
• ATC/ESP lamp on if stability functions are affected
• ABS disabled at the affected axle — both hold and release modulation unavailable
• Multiple PMV codes may appear simultaneously for the same axle
• No unusual brake feel under normal pedal pressure; fault only matters during ABS activation

Possible Causes

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

• Break in the steer axle left PMV common supply wire between EC-60 and valve connector
• Corroded or loose pin at the steer axle left PMV connector's common terminal
• Damaged steer axle left PMV valve body internally shorting the common bus
• Harness damage at a high-flex point near the steer axle left PMV branch of the axle loom
• Moisture in the steer axle left PMV connector creating a leakage path

First Checks

• Unplug the steer axle left PMV connector and measure the CMN pin to ground and to battery voltage — an open, short-to-ground, or short-to-voltage will show immediately.
• Inspect the steer axle left PMV connector for moisture, corrosion, and terminal condition before condemning the valve.
• Trace the steer axle left PMV common wire back to the EC-60 harness connector, checking for chafe points near frame rails and axle brackets.
• If the connector and harness are intact, measure valve coil resistance at the steer axle left PMV connector — a failed valve body can present as a common fault.
• A single steer axle left PMV CMN fault often triggers additional hold/release codes simultaneously; clear all and recheck after the common wire is repaired.

Can I Keep Driving?

A pressure modulation valve fault means the EC-60 may not be able to independently modulate brake pressure at the affected wheel during ABS activation. Normal brake application still functions, but anti-lock control at that corner is compromised. If the PMV cannot release pressure during a lockup event, wheel lockup may occur despite the ABS system being otherwise functional. Address before operating in conditions requiring aggressive braking.

Related Lookup Pages

• FMI 5 explanation
• Bendix manufacturer hub
• ABS / ATC / ESP fault codes
• ABS Light symptom page
• Brake Warning Light symptom page
• Search this code