CRE300-EU User Manual

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LAUNCH Series User Manual

valuable information to help you in troubleshooting and diagnosing vehicle

problems. The saved le follows the naming rule: It begins with vehicle type, and

then the record starting time and ends with .x431 (To di󰀨erentiate between les,

please congure the accurate system time). All diagnostic records can be viewed

by tapping Settings -> Data -> Diagnostic Record.

5.3 OBDII Diagnosis

This option presents a quick way to check for DTCs, isolate the cause of the

illuminated Malfunction Indicator Lamp (MIL), check monitor status prior to

emissions certification testing, verify repairs, and perform a number of other

services that are emission-related.

On the Job menu, press [OBD II] to enter system, the screen will automatically

navigate to the Monitor status screen.

Tap [OK], the following function list appears.

1. Read Codes

This option is used to identify which section of the emission control system has

malfunctioned.

2. Erase Codes

After reading the retrieved codes from the vehicle and certain repairs have been

carried out, you can use this function to erase the codes from the vehicle. Before

performing this function, please be sure the vehicle’s ignition key is in the ON

position with the engine o󰀨.

Notes:

• Before performing this function, make sure to retrieve and record the trouble codes.

• After clearing, you should retrieve trouble codes once more or turn ignition on

and retrieve codes again. If there are still some trouble codes in the system, please

troubleshoot the code using a factory diagnosis guide, then clear the code and

recheck.

3. I/M Readiness

An important part of a vehicle’s OBD II system is the Readiness Monitors, which

are indicators used to find out if all of the emissions components have been

evaluated by the OBD II system. They are running periodic tests on specific

systems and components to ensure that they are performing within allowable

limits.

Currently, there are eleven OBD II Readiness Monitors (or I/M Monitors) dened

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User Manual - Page 27