iOBD2 Diagnosis Function Introduction

Under iOBD2 [Diagnosis] menu key Engine Diagnostic features includes:


[Read DTC]: Read the current DTC (Fault Codes) the engine has stored.

[Clear DTC]: Clear all the current DTC (Fault Codes).

[Live data]: Read all the Sensor parameters that related to the Engine ECU.

[Freeze frame data]: OBD systems record exactly when a engine fault occurs and will save sensor parameter data when the DTC is set. And this group of data is called freeze frame data.

[Readiness test]: Readiness reflects the status that all the valid diagnostic functions. The diagnostic functions are referring to the important monitoring functions in OBD system, e.g. Lambda Sensor monitoring, O2 sensor heater monitoring, and EGR system monitoring, etc.

[Read vehicle info]: Read vehicle info such as Vehicle Identification Number (VIN), Calibration IDs (CALLID) and Calibration Verification Number (CVN).*

[Sensor test]: This service is to allow access to the on-board oxygen sensor monitoring test results. The same information may be obtained by the use of [Mode 6 test] *

[Mode 6 test]: This service is to allow access to the results for on-board diagnostic monitoring tests of specific components that are not continuously monitored. Examples are catalyst monitoring and the evaporative system monitoring.*

[EVAP System Test]: The purpose of this service is to enable the external test equipment to control the operation of an on-board system, test or component *


*Please note some functions and features are vehicle specific and may not be available depending on the make, model and age of your vehicle.