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Home >> Dodge and Ram >> 1993 >> Grand Caravan Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System/Component Tests - Gasoline >> Computerized Engine Controls >> Powertrain Control Module (Pcm) >> Harness Check
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Harness Check

  1. If Powertrain Control Module (PCM) is found to be faulty during SELF-DIAGNOSTICS, perform following steps to confirm diagnosis. Most components are incorrectly diagnosed due to faulty electrical connectors or poor connections between component and vehicle. Sometimes, simply disconnecting and connecting an electrical component will provide a good electrical connection.
  2. Before replacing PCM, check all components in suspected circuit. If components are okay, carefully disconnect PCM from vehicle harness.
  3. Inspect PCM harness connector and PCM contact pins for corrosion, bent pins, missing pins, spread terminals and broken wires. Clean, repair or replace connector as necessary.
  4. Connect PCM harness connector to PCM, and retest system using Diagnostic Readout Box II (DRB-II) or similar scan tool. See appropriate TESTS W/CODES article in the ENGINE PERFORMANCE section. If vehicle does not pass test and fails with same message, replace PCM.
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