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Home >> Mitsubishi >> 2003 >> Galant ES, 3.0 H >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics - 3.0L >> Scan Tool Communications >> No Communication With Engine Control Module/Powertrain Control Module >> Testing

No Communication With Engine Control Module/Powertrain Control Module: Testing

  1. Turn the ignition switch to LOCK position. Locate PCM. See Figure . Check PCM connector C-41 for loose, damaged or corroded terminals. See Figure . If connections are okay, go to next step. If faulty connections are found, repair as necessary.
  2. Check intermediate connectors C-17 and C-57. Repair or replace if necessary. Check for open or short to ground in Red/White wire between DLC C-23, terminal No. 7 and PCM connector C-41, terminal No. 85. See Figure . If problem exists, repair Red/White wire. Recheck communication. If problem does not exist, go to BATTERY & IGNITION VOLTAGE CHECK in appropriate SYSTEM & COMPONENT TESTING article.
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