Engine Control System - SFI System - Basic Inspection

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

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 performing engine troubleshooting.
1. CHECK BATTERY VOLTAGE
NOTE: Conduct this check with the engine stopped and ignition switch off.

Result





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 -- TROUBLESHOOT IDLING SPEED AND PROCEED TO NEXT STEP
OK -- Continue to next step.
6. CHECK FUEL PRESSURE
NG -- TROUBLESHOOT FUEL PRESSURE AND PROCEED TO NEXT STEP
OK -- Continue to next step.
7. CHECK FOR SPARK
NG -- TROUBLESHOOT SPARK AND PROCEED TO NEXT STEP
OK -- PROCEED TO PROBLEM SYMPTOMS TABLE