Functional Testing; Testing Engine Control; Testing Retarder Control - WABCO Compact Tester Bedienungsanleitung

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Functional Testing

After the initial installation of the ABS
system or any modifications done to
that system, the proper pneumatic and
electrical allocations of the components
must be checked. This menu item
should be addressed only if no error
currently exists.
The functional test is activated by push-
ing the following buttons:
• Push <SYSTEM> button and re-
lease.
• System used (e.g. '4 - 2') is dis-
played.
• Push <CLEAR> button for more
than 2 seconds.
After 2 seconds, 'SYS' appears on the
display.
If the warning lamp was on, it will go off
before the <CLEAR> button is released.
The ASR lamp (if any) will then come on
for 1 sec.
Pushing the <CLEAR> button for longer
than 0.5 second causes the next test
step to be addressed. If any other but-
ton is pushed for longer than 0.5 sec-
ond, the functional test is aborted and
the type of ECU identified appears on
the display ('ABS').

5.1 Testing Engine Control

ABS-D: ABS-D: For 10 seconds, the
Compact Tester transmits the request
for idle operation. This is done to test
engine control for ASR and any v-limit-
er. During that time, the accelerator is
pushed down. The engine should ad-
20
dress its idling speed. The display will
show the remaining actuation time in
seconds. If no ASR is identified, the first
digit of the display shows a dash in
place of a zero.
ABS-C: The Compact Tester is unable
to determine whether engine control is
in place, and if so, what type. For this
reason, all options are checked: Initially,
the proportional valve is addressed for
10 seconds (display: '020' ... '011'). If
such a valve has been installed, the en-
gine should address its idle speed in
spite of the accelerator being pushed
down. This is followed by the PWM in-
terface being addressed for 10 seconds
(display: '010' ... '000'). If such an inter-
face has been installed, again the en-
gine speed should remain constant
even when the accelerator is pushed
down. However, the speed which the
engine finally adjusts to depends on the
type of interface fitted.
Pushing the <CLEAR> button for longer
than 0.5 seconds causes the next test
step to be addressed. If any other but-
ton is pushed for longer than 0.5 sec-
onds, the functional test is aborted and
the type of ECU identified appears on
the display ('ABS').

5.2 Testing Retarder Control

When the <CLEAR> button is pushed
again for longer than 0.5 second, the re-
tarder is inactive for 5 seconds (display:
'005' ... '000'). Depending on the type of
retarder used, the effect of this will vary.
For more information, please refer to
the test instructions for the appropriate
retarder. If no retarder is identified, the