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.
   Fig 1: Battery Voltage Checking Table

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   1. OK: GO TO NEXT STEP. 
   2. NG: CHARGE OR REPLACE BATTERY 
2. CHECK IF ENGINE WILL CRANK 
   1. OK: GO TO NEXT STEP. 
   2. NG: PROCEED TO PROBLEM SYMPTOMS TABLE ON  PROBLEM SYMPTOMS TABLE  
3. CHECK IF ENGINE STARTS 
   1. OK: GO TO NEXT STEP. 
   2. NG: GO TO STEP   7 
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 2: Cleaning Filter With Compressed Air

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   1. OK: GO TO NEXT STEP. 
   2. NG: CLEAN OR REPLACE 
5. CHECK IDLE SPEED (See step 8 under  INSPECTION  ) 
   1. OK: GO TO NEXT STEP. 
   2. NG: PROCEED TO PROBLEM SYMPTOMS TABLE ON  PROBLEM SYMPTOMS TABLE  
6. CHECK IGNITION TIMING (See step 7 under  INSPECTION  ) 
   1. OK: PROCEED TO PROBLEM SYMPTOMS TABLE ON  PROBLEM SYMPTOMS TABLE  
   2. NG: PROCEED TO AND CONTINUE TO TROUBLESHOOT 
7. CHECK FUEL PRESSURE (See  ON-VEHICLE INSPECTION  ) 
   1. OK: GO TO NEXT STEP. 
   2. NG: PROCEED TO  ON-VEHICLE INSPECTION  AND CONTINUE TO TROUBLESHOOT 
8. CHECK FOR SPARK (See  INSPECTION  ) 
   1. OK: PROCEED TO  PROBLEM SYMPTOMS TABLE  
   2. NG: PROCEED TO  IGNITION SYSTEM (3MZ-FE)  AND CONTINUE TO TROUBLESHOOT