BENDIX EC-60 ABS-ATC STD-PREM CONTROLLERS manual POWER-UP Sequence

ABS System			Power
			Application
Status Indicators
		0.5 1.5 2.0 2.5 3.0 (sec.)
Powered Vehicle ABS	ON
Indicator Light	OFF

ATC System		Power
		Application
Status Indicator
0.5	1.5 2.0 2.5 3.0 (sec.)

Engine torque limiting ON and differential braking

enabled OFF

Trailer ABS	ON
Indicator Light	OFF
(PLC Detected)*

No ATC

ON

OFF

Trailer ABS	ON
Indicator Light	OFF
(PLC Not Detected)

*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.

FIGURE 6 - ABS DASH LIGHTS START UP SEQUENCE

Trailer ABS Indicator Lamp Control

Certain models of the EC-60™controller activate a trailer ABS Indicator Lamp (located on the dash panel) that indicates the status of the trailer ABS unit on one, or more trailers, or dollies. Typically, the EC-60™controller directly controls the trailer ABS Indicator Lamp based on the information it receives from the trailer ABS.

Alternatively, some vehicles require the EC-60™controller to activate the trailer ABS Indicator Lamp by communicating with other vehicle controllers using serial communications. (If you need to know if your EC-60™controller uses a serial communications message to operate the lamp, e-mail ABS@bendix.com, specifying the ECU part number, or call 1-800-AIR-BRAKE and speak to the Bendix TechTeam.)

SAE J1708/J1587 Serial Communications

An SAE J1708 data link, implemented according to SAE J1587 recommended practice, is available for diagnostic purposes, as well as ECU status messages.

ATC Lamp Output/ATC Off-Road Switch Input

Premium ECUs control the ATC dash lamp.

The ATC Lamp Illuminates:

1.During power up (e.g. when the vehicle is started) and turns off after the self test is completed, providing no diagnostic trouble codes are present.

2.When ATC is disabled for any reason.

3.During an ATC event (the lamp will flash rapidly).

4.When the ECU is placed in the ATC off-road mode (the lamp will flash slowly at a rate of 1.0 seconds on, 1.5 seconds off). This notifies the vehicle operator that the off-road mode is active.

FIGURE 7 - ATC INDICATOR LIGHT START UP SEQUENCE

Interaxle Differential Lock Control (AWD Transfer Case)

Premium ECUs can control the interaxle differential lock (AWD transfer case). This is recommended on AWD vehicles, but the ECU must be specially configured to provide this feature. E-mail to ABS@bendix.com for more details.

POWER-UP SEQUENCE

WARNING: The vehicle operator should verify proper operation of all installed indicator lamps (ABS, ATC, and trailer ABS) when applying ignition power and during vehicle operation.

Lamps that do not illuminate as required when ignition power is applied, or remain illuminated after ignition power is applied, indicate the need for maintenance.

ABS Indicator Lamp Operation

The ECU will illuminate the ABS Indicator Lamp for approximately three seconds when ignition power is applied, after which the lamp will extinguish if no diagnostic trouble codes are detected.

The ECU will illuminate the ABS Indicator Lamp whenever full ABS operation is not available due to a diagnostic trouble code. In most cases, partial ABS is still available.

ATC Status/Indicator Lamp Operation

The ECU will illuminate the ATC lamp for approximately 2.5 seconds when ignition power is applied, after which the lamp will extinguish, if no diagnostic trouble codes are detected.

The ECU will illuminate the ATC Indicator Lamp whenever ATC is disabled due to a diagnostic trouble code.

Trailer ABS Indicator Lamp Operation

Certain models of the ECU will control the Trailer ABS Indicator Lamp when a PLC signal (SAE J2497) from a trailer ABS ECU is detected.

5