Symptom Diagnosis

Symptom checks cannot be used properly unless the problem occurs while the vehicle is being tested. To reduce diagnostic time, ensure basic diagnostic procedures were performed in BASIC DIAGNOSTIC PROCEDURES - TRUCKS article and QUICK TEST has been performed in SELF-DIAGNOSTICS - VILLAGER article before diagnosing a symptom. Symptom checks are listed in order of probability, ease of accomplishment, and accessibility. Symptoms available for diagnosis are as follows:

• NO CRANK 
• HARD START/LONG CRANK 
• STALL AFTER START 
• NO-START/NORMAL CRANK 
• SLOW RETURN TO IDLE 
• IDLE SURGE, RUNS ROUGH OR MISSES 
• FAST IDLE, DIESELS/RUNS ON 
• LOW/SLOW IDLE, STALLS/QUITS 
• STALLS/QUITS, HESITATION/STUMBLE 
• RUNS ROUGH/MISSES 
• SURGES 
• BACKFIRES 
• LOSS OF POWER 
• SPARK KNOCK 
• POOR FUEL ECONOMY 
• EMISSIONS COMPLIANCE 
• HISSING SOUND WHEN REMOVING FUEL CAP 
• EXCESSIVE FUEL ODOR 
• WARNING INDICATOR LIGHTS 
• HIGH OIL CONSUMPTION 
• COOLING SYSTEM RUNS HOT 
• COOLING SYSTEM RUNS COLD 
• EXHAUST SMOKE OR SMELL 
• FUEL ODOR 
• ENGINE NOISE 
• VIBRATION