Basic Inspection

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

1. CHECK BATTERY VOLTAGE 
   NOTE: Carry out this check with the engine stopped and ignition switch OFF.
   BATTERY VOLTAGE SPECIFICATION
   
   

   OK		NG
   Voltage	11 V or more	Less than 11 V

   1. NG: CHARGE OR REPLACE BATTERY 
   2. OK: GO TO NEXT STEP. 
2. CHECK IF ENGINE WILL CRANK 
   1. NG: PROCEED TO  PROBLEM SYMPTOMS TABLE  
   2. OK: GO TO NEXT STEP. 
3. CHECK IF ENGINE STARTS 
   1. NG: GO TO step   7 
   2. OK: GO TO NEXT STEP. 
4. CHECK AIR FILTER 
   1. Visually check that the air filter is not excessively dirty or oily.
      NOTE: If necessary, clean the filter with compressed air. First blow from the inside thoroughly, then blow from the outside of the filter.
      Fig 1: Cleaning Air Filter Using Compressed Air

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. NG: CLEAN OR REPLACE 
      2. OK: GO TO NEXT STEP. 
5. CHECK IDLE SPEED (See  ENGINE ASSEMBLY  ) 
   1. NG: PROCEED TO  PROBLEM SYMPTOMS TABLE  
   2. OK: GO TO NEXT STEP. 
6. CHECK IGNITION TIMING (See  ENGINE ASSEMBLY  ) 
   1. NG: PROCEED TO  ENGINE ASSEMBLY  AND CONTINUE TO TROUBLESHOOT 
   2. OK: PROCEED TO  PROBLEM SYMPTOMS TABLE  
7. CHECK FUEL PRESSURE (See  ON-VEHICLE INSPECTION  ) 
   1. NG: PROCEED TO  FUEL  AND CONTINUE TO TROUBLESHOOT 
   2. OK: GO TO NEXT STEP. 
8. CHECK FOR SPARK (See  IGNITION SYSTEM  ) 
   1. NG: PROCEED TO  IGNITION SYSTEM  AND CONTINUE TO TROUBLESHOOT 
   2. OK: PROCEED TO  PROBLEM SYMPTOMS TABLE