ScanTool Ready-or-Not - Manual (Page 15)

5.1 Interpret the readiness status LEDs
The LED will start
, indicating
that the test tool is attempting
to establish communication
with the Electronic Control Unit
(ECU). The tool will try to
connect on each of the five
OBD-II protocols, until it receives a reply from the vehicle.
Normal connection time is between 1 and 25 seconds. If the vehicle
does not reply to requests on any of the five protocols, the
LED will five times, to indicate that it was not
able to connect, and after a 20 second pause, the cycle will repeat. If
connection is not established within about 60 seconds, refer to sec-
tion 6 (" ").
Once the connection is estab-
lished, the tool will request
diagnostic information from the
vehicle, and display the results
on the monitor status LEDs.
The monitor test results are updated approximately twice a minute. If
the test tool determines that the vehicle is not yet ready to be taken
back to the inspection station, the
LED will illuminate.
When the test tool determines
that the vehicle is ready for its
emissions test, it will light the
LED, and emit three
short beeps (unless the test
tool was programmed with the
"Visual only" option). The beeps will be repeated every 30 seconds to
let the driver know that the vehicle is ready to taken back to the
inspection station.
Test results will be retained for
five minutes after the ignition is
turned off, after which the
device will enter the power-
save mode, indicated by the
LED.
The Ready-or-Not will periodi-
cally wake up, and attempt to reconnect.
flashing slowly
quickly flash
slowly flashing
"Not Ready"
"Not
Ready"
"Not Ready"
Troubleshooting
"Ready"
"Ready"
OBD-II OBD-II OBD-II
CA
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SEC.
AIR
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EGR
READY NOT READY
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READY NOT READY
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SEC.
AIR
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2
EGR
READY NOT READY
CA
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SEC.
AIR
O
2
O
HTR
2
EGR
READY NOT READY
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the
Ready-or-Not
15 Ready-or-Not User Guide TM