Service manual

E21
Using the Code Reader
ERASING DIAGNOSTIC TROUBLE CODES (DTCs)
OBD2 19
8. If codes were retrieved, you can choose to:
■ Fix the problem yourself: If you choose to fix the problem
yourself, read and follow all of the vehicle service manual’s
recommendations and procedures.
■ Take your vehicle to an Automotive Service Center for repair:
Take your vehicle, a copy of the completed Preliminary Vehicle
Diagnosis Worksheet (see page 14) and codes retrieved to your
technician for evaluation. This will show your technician that you
are an informed motorist and will also assist him in pinpointing the
location of the problem as a starting point for needed repairs.
9. To prolong battery life, the Code Reader automatically turns "Off"
approximately one minute after it is disconnected from the vehicle.
Retrieved codes remain in the Code Reader’s memory, and may
be viewed at any time by turning the unit "On.” If the Code
Reader’s batteries are removed, or if the COde Reader is re-
linked to a vehicle to retrieve codes, any codes currently in its
memory are automatically cleared.
Refer to page 42 for Diagnostic Trouble Code definitions. Match the
retrieved DTC(s) with those listed. Read the associated definition(s),
and see the vehicle's service manual for further evaluation.
ERASING DIAGNOSTIC TROUBLE CODES (DTCs)
When the Code Reader’s ERASE function is used to
erase the DTCs from the vehicle's on-board computer,
"Freeze Frame" data and manufacturer-specific
enhanced data are also erased.
If you plan to take the vehicle to a Service Center for repair, DO NOT
erase the codes from the vehicle's computer. If the codes are erased,
valuable information that might help the technician troubleshoot the
problem will also be erased.
Erase DTCs from the computer's memory as follows:
When DTCs are erased from the vehicle's computer
memory, the I/M Readiness Monitor Status program resets
status of all the Monitors to a not run "flashing" condition. To
set all of the Monitors to a DONE status, an OBD 2 Drive
Cycle must be performed. Refer to your vehicle's service
manual for information on how to perform an OBD 2 Drive
Cycle for the vehicle under test.
1. If not connected already, connect the
Code Reader to the vehicle's DLC, and
turn the ignition "On.” (If the Code Reader
is already connected and linked to the
vehicle's computer, proceed directly to
step 4. If not, continue to step 2.)