Bendix Commercial Vehicle Systems EC-80 ABS ATC SD - Manual (Page 5)

5
Traction Control Valve (TCV)
Bendix EC‑80 ATC controllers will activate the TCV during
differential braking ATC events. The TCV may be a
separate valve or integrated into the rear axle relay valve.
ABS Indicator Lamp Control with Optional
Diagnostic Blink Code Switch
Bendix ® EC‑80 ™ controllers have internal circuitry to control
the ABS indicator lamp on the dash panel.
Mode
ABS
Lamp
ATC
Lamp
Trailer
ABS Lamp
HSA
Lamp
Comments
At V
ehicle Startup
Ignition on ‑ start up
(trailer with PLC)
ON for 3 sec‑
onds *
ON for 2.5
seconds *
ON for 3
seconds**
ON for 3
seconds*
* If any of the described lamp behaviors do
not occur — or if the lamp remains on during
operation — have the vehicle serviced by a
qualified mechanic as soon as possible to
restore full system functionality.
** Some vehicle manufacturers may illuminate
the trailer ABS indicator lamp at power‑up
regardless of whether a PLC signal is
detected from the trailer or not. Consult
the vehicle manufacturer’s documentation
for more details.
3 seconds after ignition
(with no Diagnostic
Trouble Codes)
Lamp OFF * Lamp OFF * Lamp OFF**
Lamp
OFF *
Special Mode Operation
ABS
Off-Road
Mode
Normal
Lamp flashes
slowly (every 2.5
seconds)
Lamp OFF
• Uses dash switch
• Not for firm road surfaces
• Allows more wheel lock‑up (less ABS intervention)
• Mode only applies under 25 mph (Over 25 mph, the system reverts to
full ABS ‑ including ATC, and ATC lamp goes off.)
During an ATC
Event
Flashes quickly
‑— OR, depending on vehicle options (a vehicle can have either ABS off‑road or HSA) —
Vehicles with Hill Start Feature: During HSA Mode Lamp OFF
• The HSA lamp is illuminated only at power‑
up, or if an HSA DTC is present
• If the driver disables HSA, the HSA lamp will
flash slowly
Deep
Mud/
Snow/
Mode
Normal OFF
Flashes slowly
(every 2.5
seconds)
• Uses dash switch
• Increases allowable wheel slip during ATC interventions
• Not for firm road surfaces During an ATC
Event
OFF Flashes quickly
During an Automatic Traction Control (ATC) Event Flashes quickly • Reduces wheel slip during acceleration at low speeds
During Dynamometer Mode
Lamp ON
(ATC
Disabled)
• Disables ATC monitoring functions
• When not in Dynamometer Mode, an illuminated lamp
indicates an ATC DTC is present
Dash Lamps
ABS System
Status Indicators
at Start-Up
Trailer ABS
Indicator Lamp
(PLC Detected)**
Trailer ABS Indicator
Lamp**
(PLC Not Detected)
Powered Vehicle ABS
Indicator Lamp
Power
Application
ON
OFF
ON
OFF
0.5 2.0 2.5 3.0 (sec.) 1.5
ON
OFF
ATC
enabled
No ATC
ATC System
Status Indicator
at Start-Up
ON
OFF
Power
Application
ON
OFF
0.5 2.0 2.5 3.0 (sec.) 1.5
CHART 2 - BENDIX ® EC‑80 ™ INDICATOR LAMP BEHAVIOR
TRLR ABS
ATC
HSA