13
"RER" (Rear) LED
This Red LED illuminates in order to indicate the location of a
component or its wiring. It will light in conjunction with either
the RIGHT or LEFT LED and the MOD or SENS LED.
"RHT" (Right) LED
This Red LED illuminates in order to indicate the location of
a component or its wiring. It will light in conjunction with
either the FRONT or REAR LED and the MOD or SENS
LED.
"LFT" (Left) LED
This Red LED illuminates in order to indicate the location of a
component or its wiring. It will light in conjunction with either
the FRONT or REAR LED and the MOD or SENS LED.
"TRC" (Traction) LED
This Red LED illuminates to indicate a permanent diagnostic
trouble code in the traction control system. It may be
illuminated with the MOD LED or may illuminate by itself.
NOTE: If a problem may exist with the wiring to the engine
control module (ECM), this LED will go on.
"MOD" (Modulator) LED
This Red LED illuminates to indicate an open or short circuit
in the solenoids of one of the four modulators or the wiring
connecting them to the system. When indicating a diagnostic
trouble code with a modulator this LED will be illuminated
with two positioning LEDs (RHT/LFT + FRT/RER). NOTE:
The MID positioning LED should not be illuminated with this
LED. This LED is also used to indicate a possible problem
with an ATR-1
™
or ATR-2
™
valve, antilock traction relay,
solenoid. When illuminated for a traction system diagnostic
trouble code the TRC LED will also be on.
"SEN" (Speed Sensor) LED
This Red LED illuminates to indicate an open or short circuit
in one of the speed sensors or the wiring connecting them
to the system. The "SEN" LED will be illuminated with two
positioning LEDs (RHT/LFT + FRT/MID/RER).
"ECU" (Electronic Control Unit) LED
This Red LED, when illuminated, indicates that the controller
itself has failed. Before controller replacement is considered,
always check vehicle voltage to the controller.
"VLT" LED
This Green LED illuminates and remains ON during vehicle
operation to indicate that vehicle power is reaching the
controller. If vehicle power is out of range (below 10 VDC or
above 18.0 VDC) this LED will flash until power is brought
into range.
"RESET"
Beneath the RESET area of the display is a magnetically
sensitive switch that is used to reset the diagnostic system.
The device will respond to a magnet which has strength
sufficient to lift a three (3) ounce weight. Momentarily holding
a magnet against the RESET will cause ALL LEDs to light
during the time the magnet is against it. Holding a magnet
against the RESET longer than 20 seconds will cause the
EC-17
™
controller to initiate the self configuration feature.
EC-17
™
CONTROLLER CONFIGURATION
IMPORTANT GENERAL NOTE:
The following information and procedure applies to the
EC-17
™
controller equipped with the optional LED diagnostic
display and magnetic RESET switch. Controllers without
this option (EC-17N
™
) must use the J1587 diagnostic link
and the DCI with its related computer programs to reconfigure
the controller. See the documentation and instructions
packaged with the equipment for specifics.
EC-17
™
CONTROLLER CONFIGURATION DISPLAY
1. Turn the ignition ON.
2. All LEDs will illuminate then go out.
3. The number of active sensors will be displayed by the
momentary illumination of the red SEN (sensor) LED
and two or more of the red locating LEDs. No other
LEDs will be on.
A. SEN + FRT (front) + RER (rear) = A four sensor
configuration (all systems must have at least a 4
sensor configuration)
B. SEN + FRT + MID (middle) + RER = A six sensor
configuration
4. The red TRC LED will momentarily illuminate by itself if
traction control torque limiting is active, if not, then the
display will go to the condition described in #5.
5. The red TRC and MOD LEDs will momentarily illuminate
if traction control differential braking is active, if not, then
the display will go to the condition described in #6. No
other LEDs will be on.
6. The diagnostic display will return to its normal operational
status. Assuming no diagnostic trouble codes exist in
the antilock or traction system, all red LEDs will be off
and the single, green, VLT LED is illuminated.
EC-17
™
CONTROLLER SELF CONFIGURING
PROCESS
Important General Information:
1. Three aspects of the antilock and traction system are
influenced by the self configuring feature of the EC-17
™
controller.
A. Speed Sensors: The number of speed sensors
connected to the EC-17
™
controller will be detected
during the self configuration process. The EC-17
™
controller will check the MID SEN (mid axle speed
sensor) locations on its connector to determine if a
sensor is connected to it and will default to a six
sensor configuration if it detects even one sensor
