10
9.
Components with stripped threads or damaged
parts should be replaced rather than repaired. Do
not attempt repairs requiring machining or welding
unless specifically stated and approved by the
vehicle and component manufacturer.
10. Prior to returning the vehicle to service, make
certain all components and systems are restored
to their proper operating condition.
11. For vehicles with Antilock Traction Control (ATC),
the ATC function must be disabled (ATC indicator
lamp should be ON) prior to performing any vehicle
maintenance where one or more wheels on a drive
axle are lifted off the ground and moving.
REMOVING THE EC-17
™
CONTROLLER
EC-17
™
CONTROLLER MOUNTED ON
ANTILOCK RELAY VALVE OR ANTILOCK
TRACTION RELAY VALVE
1. Remove as much contamination as possible from the
assembly's exterior. Keep the contamination away from
the open ports and electrical connections.
2. Identify and remove all air lines connected to the unit.
3. Disconnect the electrical connector(s) from the EC-17
™
controller.
4. Note and mark the mounting position of the assembly
on the vehicle. Loosen, remove and save the nuts on the
mounting hardware that attaches the controller relay
assembly bracket to the vehicle. Remove the relay valve
and EC-17
™
controller from the vehicle.
5. Note and mark the position of the EC-17
™
controller
relative to the valve it is mounted on. Remove and retain
the four hex head bolts that secure the EC-17
™
controller
to the valve. Then separate the EC-17
™
controller from
the valve.
BRACKET MOUNTED EC-17
™
CONTROLLER
1. Remove as much contamination as possible from the
assembly's exterior. Keep the contamination away from
open air connections and electrical connections.
2. Disconnect the electrical connector(s) from the EC-17
™
controller.
3. Note and mark the mounting position of the EC-17
™
controller on the vehicle. Loosen, remove and save the
nuts on the mounting hardware that attaches the
EC-17
™
controller bracket to the vehicle. Remove the
EC-17
™
controller and bracket from the vehicle.
4. Remove and retain the four hex head bolts that secure
the EC-17
™
controller to the bracket. Separate the
EC-17
™
controller from the bracket.
INSTALLING THE EC-17
™
CONTROLLER
EC-17
™
CONTROLLER MOUNTED ON
ANTILOCK RELAY VALVE OR ANTILOCK
TRACTION RELAY VALVE
1. After noting the relationship of the positioning marks
made prior to disassembly, position and secure the
EC-17
™
controller to the valve using the four hex head
bolts. Torque the hex head bolts to 98 Ibs. in. (Grade 5
bolts).
2. Mount the assembled EC-17
™
controller and antilock
relay valve on the vehicle and orient it in the position
marked before removal.
3. Reconnect all air lines to the assembly.
4. Reconnect the electrical connector(s) to the EC-17
™
controller and torque the connector retaining screw (“jack
screw”) to 15-20 inch pounds.
5. Test the valve for operation and leakage prior to placing
the vehicle in service.
6. Perform the "Initial Start up Procedure" in the
TROUBLESHOOTING section to assure proper system
operation. (Appropriate for both EC-17
™
& EC-17N
™
controllers).
BRACKET MOUNTED EC-17
™
CONTROLLERS
1. Secure the EC-17
™
controller to its bracket using the
four hex head bolts. Torque to 98 Ibs. in (Grade 5 bolts).
2. After noting the positioning marks, mount the EC-17
™
controller on the vehicle using the mounting hardware
retained during removal.
3. Reconnect the electrical connector(s) to the EC-17
™
controller and torque the connector retaining bolts to
15-20 inch pounds.
4. Perform the "Initial Start up Procedure" in the
TROUBLESHOOTING section to assure proper system
operation.
DIAGNOSING AND LOCATING A SYSTEM
DIAGNOSTIC TROUBLE CODE
GENERAL
The EC-17
™
controller contains self test and diagnostic
circuitry that continuously checks for proper operation of
the entire antilock/traction system, including wiring continuity.
The EC-17
™
& EC-17N
™
controllers are programmed at the
factory to accommodate the needs of the vehicle and the
customer's desires. Both the EC-17
™
& EC-17N
™
controller
can be reconfigured by the end user to include traction control
(See the Important notice concerning the EC-17N
™
controller).
A vehicle equipped with traction control can generally be
identified by noting the presence of a dash mounted condition
lamp, a disable switch (for the traction control system) and
a traction solenoid located above the relay valve.
