Laser 5091 Code Reader User’s Guide
Laser 5091 Code Reader User’s Guide
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The
Read Codes
function is used to read DTCs (stored codes), which are used
to help identify the cause of a trouble or troubles with a vehicle, and pending
codes from the vehicle’s control modules.
√ When emission-related or drivability fault occurs the control module
illuminates the malfunction indicator lamp (MIL).
√ Pending Codes are also referred to as continuous monitor or maturing
codes that indicate intermittent faults. If the fault does not occur within a
certain number of drive cycles (depending on vehicle), the code clears
from memory. If fault occurs a specifi c number of times, the code
matures into a DTC and the MIL illuminates or blinks.
√ This function can be performed with KOEO or KOER.
To read codes from vehicle control modules:
1.
Use
the
UP/DOWN
key to select Read Codes from
Diagnostic Menu
screen.
2.
Press
the
ENTER
key to confi rm.
3. View DTCs and their defi nitions.
√ If no DTCs are present a message stating “No (Pending) Codes Found!”
is
displayed.
√ If any manufacturer specifi c or enhanced codes detected, a
“Manufacturer
specifi c codes are found! Press any key to select vehicle
make!” message displays prompting you to select vehicle make before
viewing
DTC(s).
√ If manufacturer of the vehicle being tested is not list, select
Other
.
4.
Use
the
UP/DOWN
key to move back and forth through codes when
more than one code is retrieved. Use the
ENTER
key to move to next
screen when the code defi nition covers more than one screen.
5.
Press
the
ENTER
key to return to
Diagnostic Menu
screen.
6.1 Reading DTC’s
The
Clear Codes
function is used to delete DTCs and I/M Readiness data from
vehicle’s control module(s). It may also erase freeze data, and set monitors to
incomplete or not ready.
√ Perform Clear Codes function only after systems have been checked
completely.
√ After servicing the vehicle, erase stored DTCs and verify no codes have
been reset. If a DTC returns, problem has not been fi xed or other faults
are
present.
√ Depending on which monitor sets a code the vehicle may need to be
driven and the monitor ran before concluding that the fault is repaired.
√ This function is performed with KOEO. Do not start the engine.
6.2 Clearing DTC’s
