Engine Control System - SFI System - Basic Inspection

2AZ-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: BASIC INSPECTION

When a 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:

Carry out this check with the engine stopped and ignition switch off.





NG -- CHARGE OR REPLACE BATTERY

OK -- Continue to next step.

2. CHECK WHETHER ENGINE CRANKS

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 -- TROUBLESHOOT FUEL SYSTEM AND PROCEED TO NEXT STEP

OK -- Continue to next step.

7. CHECK FOR SPARK

NG -- TROUBLESHOOT IGNITION SYSTEM AND PROCEED TO NEXT STEP

OK -- PROCEED TO PROBLEM SYMPTOMS TABLE