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 POSITIVE VOLTAGE 
   NOTE: Carry out this check with the engine stopped and ignition switch OFF.
   Fig 1: Voltage SPECIFICATION Table

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   1. NG: CHARGE OR REPLACE BATTERY 
   2. OK: GO TO NEXT STEP. 
2. CHECK IF ENGINE IS CRANKED 
   1. NG: PROCEED TO PROBLEM SYMPTOMS TABLE  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 FILER 
   1. Visually check that the air filter is not excessively dirty or oily.
   1. NG: REPLACE AIR FILTER 
   2. OK: GO TO NEXT STEP. 
5. CHECK IDLE SPEED 
   1. NG: PROCEED TO PROBLEM SYMPTOMS TABLE. SEE  PROBLEM SYMPTOMS TABLE   .
   2. OK: GO TO NEXT STEP. 
6. CHECK IGNITION TIMING (See  ADJUSTMENT  .
   1. NG: PROCEED TO  IGNITION SYSTEM (2UZ-FE)  AND CONTINUE TO TROUBLESHOOT 
   2. OK: GO TO NEXT STEP. 

      PROCEED TO PROBLEM SYMPTOMS TABLE  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 (2UZ-FE)  )  .
   1. NG: PROCEED TO  IGNITION SYSTEM (2UZ-FE)  AND CONTINUE TO TROUBLESHOOT 
   2. OK: GO TO NEXT STEP. 

      PROCEED TO PROBLEM SYMPTOMS TABLE  PROBLEM SYMPTOMS TABLE