BENDIX SD-13-4788 Manual de usuario descargar pdf (Pagina 8)

AUTO CALIBRATION

For optional ATC performance the ECU utilizes a feature

referred to as auto calibration. Auto calibration allows the

ECU to compensate for various tire sizes throughout the

life of the vehicle. As there are many conditions that can

result in the appearance of a change in the tire size, several

items must be satisﬁ ed before the auto calibration feature

is active. The auto calibration feature would automatically

change the ECUs imbedded tire sizes if the difference

exceeded approximately 8%. If issues occur with your ATC

due to tire size changes please contact 1-800-AIR-BRAKE

or 1-800-247-2725 for assistance.

SINGLE FAILURE

The following list and chart describes how the antilock and

traction systems respond to a speciﬁ c component failure.

(Note: right and left; front, mid and rear are determined

from the driver’s seat. Left front is therefore the corner

closest to the driver.)

For example, if the right mid sensor (“RM Sensor” on the

chart) fails, front and rear antilock will still be operative.

Traction will be disabled. On those axles where antilock is

disabled the system reverts to standard air braking.

Front modulator - If a front modulator fails, antilock on that

wheel is disabled. Antilock and traction on all other wheels

remains active.

Rear modulator - A rear modulator failure disables the

traction system. Antilock on that wheel will also be disabled,

but antilock on all other wheels remains active.

Front sensor - The wheel is still modulated using input

from the opposite sensor on the front axle. The traction

system is disabled.

Mid or rear sensor - In a four sensor system, antilock on

that wheel(s) is disabled, but antilock on all other wheels

remains active. In a six sensor system, antilock remains

active using input from the remaining functional sensor.

In both the four and six sensor system traction control is

disabled.

Controller - Antilock and traction are disabled. The system

reverts to standard air braking.

Traction solenoid - Traction control is disabled. Antilock

remains active.

Engine Control Module - If the engine control module (ECM)

or the wiring from the EC-17

™

controller to the ECM fails,

traction control is disabled. Antilock remains active.

Voltage - If system voltage is out of range, antilock and

traction are disabled. The system reverts to standard air

braking.

MULTIPLE FAILURES

In the event that multiple failures occur, the dash lamp

will react as it normally would during a single failure, and

the EC-17

™

controller equipped with LEDs will show one

diagnostic trouble code at a time. When the ﬁ rst diagnostic

trouble code is ﬁ xed and the system is reset, the next

diagnostic trouble code area will appear at the LEDs.

This way, the driver or mechanic does not lose track of

diagnostic trouble code areas, and the system is not

restored until each and every error is corrected and the

EC-17

™

controller is cleared of all diagnostic trouble codes.

FRONT OF VEHICLE

REAR OF VEHICLE

DRIVER

RIGHT FRONT

LEFT FRONT

RIGHT REAR

LEFT REAR

RIGHT MID

LEFT MID

DIAGNOSTIC TROUBLE CODE LOCATION

SYSTEM STILL OPERATING (YES/NO)

Failed ABS Front ABS Rear Traction Std.

Device Left Right Left Right Braking

RF Sensor YES YES YES YES NO YES

LF Sensor YES YES YES YES NO YES

RM Sensor YES YES YES YES NO YES

LM Sensor YES YES YES YES NO YES

RR Sensor YES YES YES NO

NO YES

LR Sensor YES YES NO

YES NO YES

RF Modulator YES NO YES YES YES YES

LF Modulator NO YES YES YES YES YES

RR Modulator YES YES YES NO NO YES

LR Modulator YES YES NO YES NO YES

Controller NO NO NO NO NO YES

Tract. Solenoid YES YES YES YES NO YES

Engine Control

Module

YES YES YES YES NO YES

Voltage

NO NO NO NO NO YES

ABS is still available in 6 sensors system if mid sensor is functional

When ECM wiring or voltage “corrects” itself, system is restored.

RESET

SWITCH

FIGURE 7 - EC-17

™

CONTROLLER LED DIAGNOSTIC

DISPLAY

FRT

MID

RER

RHT

LFT

TRC

MOD

SEN

ECU

VLT

FRONT

MIDDLE

REAR

RIGHT

LEFT

TRACTION

MODULATOR

SENSOR

ECU

VOLTAGE

1 2 3 4 5 6 7 8 9 10 11 12 13 ... 31 32

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BENDIX SD-13-4788 Manual de usuario Pagina 8

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