PREVOST LE MIRAGE XLII BUS SHELLS Maintenance Manual Download

Page: 472 / 1260

REVISED 5/31/05

(If you need to know if this 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.

Interaxle Differential Lock Control (AWD

Transfer Case)

Advanced 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

NOTICE:

The vehicle operator should verify proper operation

of all installed indicator lamps (ABS, ATC/ESP, 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 (Bulb Check)

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/ESP Status/Indicator Lamp Operation

The ECU will illuminate the ATC/ESP 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 continuously illuminate the ATC/

ESP Indicator Lamp whenever ESP or ATC is disabled due

to a diagnostic trouble code.
During an ESP or ATC intervention, the lamp will ﬂash

rapidly (2.5 times per second). When the ECU is placed

in the ATC Mud/Snow (off-road) mode, the lamp will ﬂash

slowly at a rate of once every 2.5 seconds

Trailer ABS Indicator Lamp Operation

The ECU will control the Trailer ABS Indicator Lamp

when a PLC signal (SAE J2497) from a trailer ABS ECU

is detected.

ECU Conﬁguration Test

Within two seconds of the application of ignition power,

the ECU will perform a test to detect system conﬁguration

with regards to the number of wheel speed sensors and

PMVs. This can be audibly detected by a rapid cycling of

the PMVs.
(Note: The ECU will not perform the conﬁguration test when

wheel speed sensors show that the vehicle is in motion.)

Pressure Modulator Valve and Traction Control

Valve Chuff Test

After the performance of the conﬁguration test, the EC-60

™

controller will perform a Bendix-patented PMV and TCV

Chuff Test. The Chuff Test is an electrical and pneumatic

PMV test that can assist maintenance personnel in verifying

proper PMV wiring and installation.
With brake pressure applied, a properly installed PMV will

perform one sharp audible exhaust of air by activating the

hold solenoid twice and the release solenoid once. If the

PMV is wired incorrectly, it will produce two exhausts of

air or none at all.

FIGURE 10 - VEHICLE ORIENTATION (TYPICAL)

Driver

Right Steer

Left Steer

Right

Additional

Left

Additional

Right Drive

Left Drive

FIGURE 8 - ABS DASH LIGHTS START UP SEQUENCE

*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

PREVOST LE MIRAGE XLII BUS SHELLS, Maintenance Manual

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