Operation
6-8
ENGINE DIAGNOSIS
2. DIAGNOSTIC TROUBLE CODE (DTC) CHECK, RECORD AND CLEARANCE
First, check DTC referring to “DTC Check” in Section 6E1. If DTC is indicated, print it or write it down and then
clear it by referring to “DTC Clearance” in Section 6E1. DTC indicates malfunction that occurred in the system
but does not indicate whether it exists now or it occurred in the past and the normal condition has been restored
now. To check which case applies, check the symptom in question according to Step 5 and recheck DTC accord-
ing to Step 6 or 7.
Attempt to diagnose a trouble based on DTC in this step only or failure to clear the DTC in this step will lead
to incorrect diagnosis, trouble diagnosis of a normal circuit or difficulty in troubleshooting.
3. and 4. VISUAL INSPECTION
Be sure to perform visual check of the following items that support proper function of the engine.
INSPECTION ITEM
REFERRING SECTION
Engine oil – – – – – level, leakage
Engine coolant – – – – – level, leakage
Fuel – – – – – level, leakage
Air cleaner element – – – – – dirt, clogging
Battery – – – – – fluid level, corrosion of terminal
Water pump belt and / or cooling fan belt – – – – – tension, damage
Throttle cable – – – – – play, installation
Vacuum hoses of air intake system – – – – – disconnection, looseness,
deterioration, bend
Connectors of electric wire harness – – – – – disconnection, friction
Fuses – – – – – burning
Parts – – – – – installation, bolt – – – – – looseness
Parts – – – – – deformation
Other parts that can be checked visually
Also check following items at engine start, if possible
Malfunction indicator lamp
Charge warning lamp
Engine oil pressure warning lamp
Engine coolant temp. meter
Fuel lever meter
Abnormal air being inhaled from air intake system
Exhaust system – – – – – leakage of exhaust gas, noise
Other parts that can be checked visually
Section 0B
Section 0B
Section 0B
Section 0B
Section 0B
Section 6E1
Section 8
Section 6E1
Section 6H
Section 8
Section 8
Section 8
