Basic Inspection

When no malfunction code can be confirmed in DTC check, trouble shoot all possible circuits to be considered as a cause of problems. In many cases, by carrying out basic engine check shown in following flow chart, location causing problem can be found quickly and efficiently. Therefore use of this check is essential in engine trouble shooting.

1. Check battery positive voltage. Carry out this check with engine stopped. If there is 11 V or more, go to next step. If voltage is less than 11 V, charge or replace battery.
2. Check if engine cranks. If engine cranks, go to next step. If engine does not crank, see TROUBLE SHOOTING - NO CODES article.
3. Check if engine starts. If engine starts, go to next step. If engine does not start, go to step  7.
4. Visually check that air filter is not excessively dirty or oily. If necessary, clean filter with compressed air. First blow from inside thoroughly, then blow from outside of filter. If results are OK, go to next step. If results are not good, repair or replace.
5. Check idle speed. See ON-VEHICLE ADJUSTMENTS - 4-CYLINDER article. If results are OK, go to next step. If results are not good, go to TROUBLE SHOOTING - NO CODES article.
6. Check ignition timing. See ON-VEHICLE ADJUSTMENTS - 4-CYLINDER article. If results are OK, go to TROUBLE SHOOTING - NO CODES article. If results are not good, continue to trouble shoot.
7. Check fuel pressure. See BASIC DIAGNOSTIC PROCEDURES - 4-CYL article. If results are OK, go to next step. If results are not good, continue to trouble shoot.
8. Check for spark. See BASIC DIAGNOSTIC PROCEDURES - 4-CYL article. If results are OK, go to TROUBLE SHOOTING - NO CODES article. If results are not good, continue to trouble shoot.