WABCO Easy-Stop Basic, Руководство по обслуживанию

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Page 33
Section 7
Sensor Adjustment & Component Testing
ABS Sensor Installation Test
(ECU Part Number 472 500 011 0)
1. Remove power.
2. Raise both sensed wheels off of the ground.
Apply air to emergency line to fill air tanks and
release parking brake.
3. Provide 12 volts DC power (9.5–14 volts is an
acceptable range) to ECU/Valve Assembly.
(Make sure trailer ABS warning lamp and ECU
blink code lamp operate correctly, as described
in “ABS Electrical/Hardware Installation Test”.)
4. Rotate the sensed wheels — ONE AT A TIME —
at a rate of 1/2 revolution per second.
5. Check Table G — Sensor Installation Test,
“Sensor Installation Test.”
Table G — Sensor Installation Test
Table H — Blink Code Table
After making the necessary corrections, repeat
the sensor installation test to verify proper
sensor installation.
If Status Action
Trailer ABS warning lamp
goes
OFF .
ECU senses proper speed.
Sensors properly installed. No further testing required.
Trailer ABS warning lamp does not
go
OFF .
AND
There is no blink code flashing on
the ECU.
There is a sensor
gap problem. Adjust sensor gap. Push sensor
into its holder until it contacts the
tooth wheel.
Measure the AC voltage output.
Value should be 0.2 volts AC when
wheel is rotated at a rate of
1/2 revolution per second.
Make necessary repairs.
Trailer ABS warning lamp does not
go
OFF .
AND
Blink code is on and flashing
on ECU.
System fault exists. Count the number of flashes.
This is the blink code.
Using Table H — Blink Code Table,
identify the blink code.
Make necessary repairs.
Blink
Code Problem
Area
Action
4 Sensor YE1
(curbside
sensor) Check sensor installation.
Make necessary repairs.
6 Sensor YE2
(roadside
sensor) Check sensor installation.
Make necessary repairs.
10 ECU/Valve
Assembly Verify proper installation.
If blink code continues,
contact WABCO for
assistance.
Blink
Code Problem
Area
Action
14 Power
Supply Verify proper electrical
installation. Check
power supply. Make
necessary corrections.
15 ECU
Failure Verify proper installation.
If code continues,
contact WABCO for
assistance.