Basic Inspection

3UZ-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: BASIC INSPECTION

When the malfunction is not confirmed by the DTC check, troubleshooting should be carried out in all circuits considered to be possible causes of the problem. In many cases, by carrying out the basic engine check shown in the following flowchart, the location of the problem can be found quickly and efficiently. Therefore, using this check is essential when engine troubleshooting.

1. CHECK BATTERY VOLTAGE

NOTICE:
Perform this check with the engine stopped and the ignition switch OFF.





NG -- CHARGE OR REPLACE BATTERY
OK -- Continue to next step.

2. CHECK WHETHER ENGINE WILL CRANK

NG -- PROCEED TO PROBLEM SYMPTOMS TABLE
OK -- Continue to next step.

3. CHECK WHETHER ENGINE STARTS

NG -- GO TO STEP 6
OK -- Continue to next step.

4. CHECK AIR FILTER

(a) Visually check that the air filter is not excessively contaminated with dirt or oil.

NG -- REPLACE AIR FILTER
OK -- Continue to next step.

5. CHECK IDLING SPEED

NG -- PROCEED TO PROBLEM SYMPTOMS TABLE
OK -- Continue to next step.

6. CHECK FUEL PRESSURE

NG -- PROCEED TO TROUBLESHOOTING
OK -- Continue to next step.

7. CHECK FOR SPARK

NG -- PROCEED TO TROUBLESHOOTING

OK -- PROCEED TO PROBLEM SYMPTOMS TABLE