Engine Controls - Trouble Shooting - No Codes: Introduction

Before diagnosing symptoms or intermittent faults, follow proper workflow. See DIAGNOSTIC PROCEDURE under SELF-DIAGNOSTIC SYSTEM in appropriate SELF-DIAGNOSTICS article. See SELF-DIAGNOSTICS - DAKOTA , SELF-DIAGNOSTICS - DURANGO - JTEC or SELF-DIAGNOSTICS - DURANGO - NGC article. If no Diagnostic Trouble Codes (DTC) are present and a no-start condition exists, proceed to BASIC DIAGNOSTIC PROCEDURES - DAKOTA & DURANGO article. If no DTCs are present and a driveability condition exists, diagnose by symptom (i.e., ROUGH IDLE, ENGINE STALLS, etc.).

Symptom checks direct technician to malfunctioning component(s) for further diagnosis. A symptom should lead to a specific component, system test or an adjustment.

Use intermittent test procedures to locate driveability problems that do not occur when the vehicle is being tested. See INTERMITTENTS . These test procedures should also be used if a DTC code is present, but no problem is found during self-diagnostic testing.

NOTE: For specific testing procedures, see SYSTEM & COMPONENT TESTING DAKOTA & DURANGO article. For specifications, see appropriate ON-VEHICLE ADJUSTMENTS or appropriate SERVICE & ADJUSTMENT SPECIFICATIONS article.