Bendix Commercial Vehicle Systems EC-16 ANTILOCK CONTROLLER 4/08 - Manual (Page 8)

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Mid or rear sensor - Antilock on that wheel is disabled, but
antilock on all other wheels remains active. 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-16
™ 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.
*Note: A voltage problem and an intermittent ECM wiring
problem can "correct" themselves. For example, a
power surge can take the system out of voltage
range for a moment, which will flash the voltage
LED and an intermittent wiring problem between
the EC-16
™ controller and the ECM can cause the
traction LED to go on. During the time that the
problem is occurring, the dash lamp will also be on.
When the problem corrects itself, the system is
restored. The dash lamp and the appropriate LED
go out.
For all other problems, the system will not be restored in
the problem area until the error is corrected and the EC-16
™
controller is cleared with the reset switch. It should be
remembered that the driver will be advised of the degraded
operation via the dash lamps and that standard air braking
will still be available on those brakes where the EC-16
™
controller has disabled the system.
MULTIPLE FAILURES
In the event that multiple failures occur, the dash lamp will
react as it normally would during a single failure, and the
LEDs will show one failure at a time. When the first problem
is fixed and the system is reset, the next problem area will
appear at the LEDs. This way, the driver or mechanic does
not lose track of problem areas, and the system is not
restored until each and every error is corrected and the
EC-16
™ controller is reset.
SYSTEM STILL OPERATING (YES/NO)
Std.
ABS Front ABS Rear Traction Braking
Left Right Left Right
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
Solenoid YES YES YES YES NO YES
Engine Control YES YES YES YES NO YES
Module*
Voltage*
NO NO NO NO NO YES
*When ECM wiring or voltage "corrects" itself, system is restored.
ANTILOCK AND TRACTION WIRING
GENERAL NOTES
The wires that carry information and power into and out of
the EC-16
™ controller are generally grouped and terminate
at a connector. The wire groups or wire harnesses along
with the connectors are most often specified and/or supplied
by the vehicle manufacturer. The connectors used on the
EC-16
™ controller are illustrated in Figure 4. The wiring
harnesses and connectors are weather resistant and the
wires that enter the connector are sealed to the connector.
The wire gauge used in the wire harnesses is specific to the
task performed.
When diagnosing wiring in the antilock system the following
general rules apply and should be followed where applicable:
1. It is generally advisable to replace a wire harness rather
than repair individual wires in the harness. If a splice
repair must be made, it is important that the splice be
properly soldered with a rosin flux (not acid based) and
made water proof.
2. Do not pierce wire insulation when checking for continuity.
Check for power, ground or continuity by disconnecting
the connector and testing the individual pins or sockets
in the connector.
3. Always check the vehicle handbook for wire and
connector identification. Individual wire identification will
differ depending upon the type of connectors in use, the
vehicle manufacturer, and the system features in use.
4. While the retarder disable, serial link, and traction on/
off connections (4 total) are present on all EC-16 ™
controllers they are not always used.
FAILURE LOCATION