D439E Service Manual 5. Service Tool
243
Self Test
This is the function for checking if the circuits relating to the communication of G-scan and the DLC cable
have defects or not. If G-scan has problems relating to the vehicle communication function, conduct the test
following the instruction of the screen.
Description of Self Test Screen
<Figure 1: Description of Self Test Screen>
Checks the defects of circuits relating to the vehicle communication of G-scan.
Checks the defects of the DLC cable.
Start the Self Diagnosis Test.
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