agn RESULT PROCEED TO No symptoms exist A Symptoms exist B Go to step B 5 A 4. SIMULATION TEST USING SYMPTOM SIMULATION METHODS NEXT 5. DTC CHECK RESULT PROCEED TO DTC is not output A DTC is output B TROUBLESHOOTING OF PROBLEM INDICATED BY B DTC A 6. SYMPTOM CONFIRMATION RESULT PROCEED TO Symptoms exist A No symptoms exist B f a DTC was displayed in the initial DTC check, the problem may have occurred in a wire harness or connector in that circuit in the past. Check the wire harness and connectors.
B SYSTEM NORMAL A TROUBLESHOOTING OF EACH PROBLEM SYMPTOM The problem is still occurring in a place other than the diagnostic circuit (the DTC displayed first is either for a past problem or a secondary problem). 4. SYMPTOM SIMULATION HINT: The most difficult case in troubleshooting is when no problem symptoms occur. In such a case, a thorough problem analysis must be carried out. A simulation of the same or similar conditions and environment in which the problem occurred in the customer's vehicle should be carried out.
No matter how much skill or experience a technician has, troubleshooting without confirming the problem symptoms will lead to important repairs being overlooked and mistakes or delays. For example: With a problem that only occurs when the engine is cold or as a result of vibration caused by the road during driving, the problem can never be determined if the symptoms are being checked on a stationary vehicle or on a vehicle with a warmed-up engine. Vibration, heat or water penetration (moisture) is difficult to reproduce. The symptom simulation tests below are effective substitutes for the conditions and can be applied on a stationary vehicle.
cardi B Go to step 5 B TROUBLESHOOTING OF PROBLEM INDICATED BY DTC B SYSTEM NORMAL A TROUBLESHOOTING OF EACH PROBLEM SYMPTOM