How to Use OEM Diagnostic and Service Information

Troubleshooting Procedure





Basic flow of troubleshooting


On-board diagnosis
Diagnostic trouble codes (DTCs) are important hints for repairing malfunctions that are difficult to simulate. Perform the specific DTC diagnostic inspection to quickly and accurately diagnose the malfunction.

The on-board diagnostic function is used during inspection. When a DTC is shown specifying the cause of a malfunction, continue the diagnostic inspection according to the items indicated by the on-board diagnostic function.

Engine tune-up
Any necessary adjustments are made after starting the engine.

Basic inspection
The basic inspection is performed to quickly narrow down the possible causes of a malfunction regardless of symptoms. Also, basic inspection is performed to locate the area(s) of any malfunction.

Diagnostic index
The diagnostic index lists the symptoms of specific malfunctions. Select the symptoms related or most closely relating to the malfunction.

Symptom troubleshooting
Symptom troubleshooting quickly determines the location of the malfunction according to symptom type.