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Home >> Jeep >> 1990 >> Wagoneer >> Repair and Diagnosis >> Engine Performance >> System >> Ignition System Tests - 4.0L >> Testing >> Basic Diagnostic Procedures

Basic Diagnostic Procedures

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This section contains information for determining individual system component performance. Diagnosis of ECU/Engine Control System is performed using the DRB-II Diagnostic Tester. See the appropriate Computerized Engine Control System article in this section.

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