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Home >> Mitsubishi >> 2002 >> Eclipse RS, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self Diagnostics - 2.4L >> Diagnostic Circuit Check >> Scan Tool Will Not Communicate >> No Communication With All Systems
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No Communication With All Systems

A battery positive voltage is applied on the data link connector power terminal (terminal 16). The ground terminals (terminal 4, 5) are grounded to the vehicle body.

NOTE: The cause of the fault is probably a defect in power supply system (including ground) for the on-board diagnostic test mode line. The most likely causes for this case are malfunction of the data link connector or a damaged harness wire.
  1. Measure the voltage between terminal 16 and ground. See Figure. If the voltage shows normal (battery positive voltage), go to step  3, otherwise go to next step.
  2. Check harness connectors C-108, C-113 and C-89 at intermediate connector for damage, and repair or replace as required. If intermediate connectors are in good condition, repair harness wire between fusible link (2) and data link connector C-29, terminal 16 because of open circuit. Then confirm that the malfunction symptom is eliminated.
  3. Check for continuity between terminals 4, 5 and ground (the resistance should be less than 2 ohms). If the continuity is normal, replace the scan tool and confirm that the malfunction symptom has been eliminated. If the continuity is not normal, repair harness wire between data link connector C-29, terminal 4, 5 and ground because of open circuit or harness damage. Confirm that the malfunction has been eliminated.
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