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 troubleshooting the engine.

1. CHECK AUXILIARY BATTERY VOLTAGE 
   NOTE:

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

   RESULT
   
   

   Result	Proceed to
   11 V or higher	OK
   Below 11 V	NG

   NG → CHARGE OR REPLACE AUXILIARY BATTERY 

   OK: Go to next step 

2. CHECK WHETHER ENGINE CRANKS 

   NG → PROCEED TO PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE  

   OK: Go to next step 

3. CHECK WHETHER ENGINE STARTS 

   NG → GO TO STEP   6 

   OK: Go to next step 

4. CHECK AIR CLEANER FILTER ELEMENT SUB-ASSEMBLY 
   1. Visually check that the air cleaner filter element sub-assembly is not excessively contaminated with dirt or oil.

      NG → REPLACE AIR CLEANER FILTER ELEMENT SUB-ASSEMBLY 

      OK: Go to next step 

5. CHECK IDLING SPEED 
   1. Check the engine idling speed. Refer to ON-VEHICLE INSPECTION - Step 7 .

      NG → TROUBLESHOOT IDLING SPEED AND PROCEED TO NEXT STEP 

      OK: Go to next step 

6. CHECK FUEL PRESSURE 
   1. Check the fuel pressure. Refer to ON-VEHICLE INSPECTION - Step 2 .

      NG → TROUBLESHOOT FUEL PRESSURE AND PROCEED TO NEXT STEP 

      OK: Go to next step 

7. CHECK FOR SPARK 
   1. Perform a spark test. Refer to ON-VEHICLE INSPECTION - Step 1 .

      NG → TROUBLESHOOT SPARK AND PROCEED TO NEXT STEP 

      OK → PROCEED TO PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE