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Home >> Mitsubishi >> 1996 >> Eclipse Base, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes - 2.0L Non-Turbo >> Diagnostic Tests >> Scan Tool Will Not Communicate >> No Communication With PCM

No Communication With PCM

  1. Check junction connectors and wiring harness between PCM and DLC. If wiring and connectors are okay, disconnect PCM connector. Turn ignition on. Check voltage between PCM connector terminal No. 2 (Black/Red wire) and ground. If battery voltage exists, go to next step. If battery voltage does not exist, check MFI relay connector and wiring harness between MFI relay connector and PCM.
  2. Check continuity between PCM connector terminal No. 12 (Black wire) and ground. If continuity exists, go to next step. If continuity does not exist on any circuit, check wiring harness between PCM and ground.
  3. Check voltage between PCM connector terminal No. 14 (Black/White wire) and ground. If battery voltage exists, check PCM connector. If PCM connector is okay, replace PCM. If battery voltage does not exist, check wiring harness between PCM and battery.
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