How To Perform Trouble Diagnoses For Quick And Accurate Repair: Introduction

The most important point in performing the trouble diagnosis, is to understand the systems (control and mechanism) of the vehicle thoroughly.
It is also important to clarify the customer complaints before inspection.
First, reproduce the symptom, and understand it fully. Ask the customer about his/her complaints carefully. In some cases, it will be necessary to check the symptoms by driving the vehicle with the customer.

CAUTION: Customers are not professionals. It is dangerous to make an assumption like "maybe the customer means that..." or "maybe the customer means this symptom".
It is essential to check symptoms right from the beginning in order to repair a malfunction completely.
For an intermittent malfunction, it is important to reproduce the symptom based on an interview with the customer and past examples. Do not perform an inspection on an ad hoc basis. Most intermittent malfunctions are caused by poor contacts. In this case, it will be necessary to shake the suspected harness or connector by hand. When repairs are performed without proper trouble diagnosis, repair work can not be guaranteed that it has been done correctly.
After the diagnosis, make sure to carry out "erase memory". Refer to FUNCTIONS OF CONSULT-II .
For an intermittent malfunction, move the harness or harness connector by hand to check for poor contact or false open circuit.
Always read the TRACTION CONTROL DISABLE PROCEDURES to check the general guidelines and to confirm the general precautions.