SECTION 12: BRAKE AND AIR SYSTEM
28
DOB 2490-2789 | X3-45 Commuter PA1605 Maintenance Manual (Final Version – Rev.2 April 2016)
FIGURE 42: ABS SENSOR LOCATION
12153
NOTE
The resistance value, when sensors are
checked as a unit, must be equal to 1,75 k
ohms. To check the sensors for proper output
voltage after the sensors and toothed wheels
have been assembled to the axle, connect a
suitable AC voltmeter across the output
terminals. With the hubs rotating at 30 rpm,
the output voltages should read from 50 to
1999 mV to be acceptable.
Sensor Installation
The following procedure deals with sensor
installation on the axle wheel hubs. Read
procedure carefully before reinstalling a sensor,
as its installation must comply with operational
tolerances and specifications.
1. Apply recommended lubricant (Prevost
#680460) to spring clip and sensor.
CAUTION
Use only this type of grease on the sensors.
2. Insert spring clip in the holder on hub. Make
sure the spring clip tabs are on the inboard
side of the vehicle. Push in until the clip
stops.
3. Push the sensor completely inside the
spring clip until it is in contact with the tooth
wheel. Ensure mounting is rigid, as it is an
important criterion for adequate sensor
operation.
NOTE
This installation should be of the "press fit"
type.
29.5 SPRING
CLIP
The spring clip retains the sensor in its mounting
bracket close to the toothed pulse wheel. The
gap between the sensor end and teeth is set
automatically by pushing the sensor in the clip
hard up against the tooth wheel, and the latter
knocks back the sensor to its adjusted position
(Figure 43).
FIGURE 43: SPRING CLIP
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Maintenance
The spring clip requires no specific
maintenance.
30. BENDIX AUTOMATIC TRACTION
CONTROL (ATC) – ELECTRONIC
STABILITY CONTROL (ESC)
In addition to the ABS function, vehicle is
equipped with a Traction Control System (TCS)
feature. This feature is provided by the Bendix
EC-60 advanced controller. Bendix refers to this
feature as
Automatic Traction Control (ATC)
.
Bendix ATC can improve vehicle traction during
acceleration, and lateral stability while
accelerating through curves. ATC utilizes
Engine Torque Limiting (ETL)
where the ECU
communicates with the engine’s controller
and/or
Differential Braking (DB)
where
individual wheel brake applications are used to
improve vehicle traction.
The EC-60 advanced model controller also
provides an ABS-based Electronic Stability
Control (ESC) feature. Bendix refers to it as
ESC Electronic Stability Control
.
The Bendix ESC system is an ABS-based
stability system that enhances vehicle stability
by both reducing engine throttle and by applying
vehicle braking based on actual vehicle
dynamics
ESC stability system consists of Yaw Control
(YC) and Roll Stability Program (RSP) features.
