Laser 5091, Instructions Manual

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Laser 5091 Code Reader User’s Guide
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Laser 5091 Code Reader User’s Guide
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non-volatile memory and may not be erased by any diagnostic services or by disconnecting
power to ECU.
There are two ways to read codes using
5091 .
● Press the Read hot key to read codes from home screen.
● Traditional way: select Read Codes from the diagnostic menu.
To read codes from a vehicle:
1. Press the Read hot key to directly read the codes from home screen. Or scroll with the
UP/DOWN key to highlight Read Codes from Diagnostic Menu and press the ENTER key.
Figure 4-3 Sample Diagnostic Menu Screen
2. Select
Stored Codes
/
Pending Codes/ Permanent Codes
and press the
ENTER
key to
confirm.
Figure 4-4 Sample Read Codes Screen
3. A code list including code number and its description displays.
Figure 4-5 Sample DTC Description Screen
NOTE:
If no DTCs are present, the message “No (Pending) Codes Found!” is displayed. If any
manufacturer specific or enhanced codes detected, 5091 reads the correct DTC information
automatically according to the VIN.
4.2 Erase Codes
Erase Codes menu lets you to clear all current and stored DTCs from the control module. Also it
erases all temporary ECU information, including freeze frame. So make sure that the selected
system are completely checked and serviced by technicians and no vital information will be lost
before clearing codes.
There are two ways to erase codes:
● Press the Erase hot key to erase codes from home screen.
● Traditional way: select Erase Codes from the diagnostic menu.
NOTE :
●
To clear codes, make sure that the ignition key is switched to ON with the engine off.
●
Erase Codes does not fix the problem that caused the fault! DTCs should only be erased after
correcting the condition(s) that caused them.
To clear codes:
1. Press the Erase hot key to directly erase the codes from the home menu. Or use the
UP/DOWN key to highlight Erase Codes from Diagnostic Menu and press the ENTER key.
Figure 4-6 Sample Diagnostic Menu Screen
2. Follow the on-screen instructions and answer questions about the vehicle being tested to
complete the procedure.
Figure 4-7 Sample Erase Codes Screen
3. Check the codes again. If any codes remain, repeat the Erase Codes steps.