Engine Will Not Start, And HDS Does Not Communicate With The ECM/PCM (MIL Comes On And Stays On)

Engine will not start, and HDS does not communicate with the ECM/PCM (MIL comes on and stays on)

Engine will not start, and HDS does not communicate with the ECM/PCM
(MIL comes on and stays on)

Troubleshoot the DLC circuit Testing and Inspection.

Also check for

No power to ECM/PCM

Also check for

No ground to ECM/PCM

Also check for

Short in reference voltage circuit