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Diagnostic System Check

  1. Install scan tool to Data Link Connector (DLC). DLC is located under instrument panel, near steering column. If scan tool powers up, go to next step. If scan tool does not power up, see appropriate 2.2L or 4.3L SELF-DIAGNOSTICS article in ENGINE PERFORMANCE.
  2. Turn ignition on. Attempt to establish communication with Powertrain Control Module (PCM). If communication is established, go to next step. If communication cannot be established, see appropriate 2.2L or 4.3L SELF-DIAGNOSTICS article in ENGINE PERFORMANCE.
  3. Select PCM display DTCs function on scan tool. If scan tool displays any DTCs, go to next step. If scan tool does not display any DTCs, see SYMPTOM TEST INDEX  table under SYMPTOM TESTS.
  4. If scan tool displays any DTCs beginning with "U", go to appropriate SELF-DIAGNOSTIC article in ENGINE PERFORMANCE. If scan tool does not display any DTCs beginning with "U", go to next step.
  5. If scan tool displays DTC P0530, see DTC P0530: A/C REFRIGERANT PRESSURE SENSOR SIGNAL VOLTAGE OUT OF RANGE (2.2L MODELS ONLY)  under DIAGNOSTIC TESTS. If scan tool displays any other DTCs beginning with "P", go to appropriate SELF-DIAGNOSTIC article in ENGINE PERFORMANCE. If scan tool does not display any DTCs, see SYMPTOM TEST INDEX  table under SYMPTOM TESTS.
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