How To Proceed With Troubleshooting

HINT

• Use these procedures to troubleshoot the push-button start function
• * Use the Techstream

1. VEHICLE BROUGHT TO WORKSHOP 
2. CUSTOMER PROBLEM ANALYSIS CHECK 

   HINT

   • In troubleshooting, confirm that the problem symptoms have been accurately identified Preconceptions should be discarded in order to make an accurate judgment To clearly understand what the problem symptoms are, it is extremely important to ask the customer about the problem and the conditions at the time the malfunction occurred
   • Gather as much information as possible for reference. Past problems that seem unrelated may also help in some cases
   • The following 5 items are important points in the problem analysis
   REFERENCE CHART
   
   

   What	Vehicle model, system name
   When	Date, time, occurrence frequency
   Where	Road conditions
   Under what conditions?	Running conditions, driving conditions, weather conditions
   How did it happen?	Problem symptoms

3. INSPECT BATTERY VOLTAGE 

   Standard Voltage: 

   11 to 14 V 

   If the voltage is below 11 V, recharge or replace the battery before proceeding

4. CHECK MULTIPLEX COMMUNICATION SYSTEM (BEAN)* 
   1. Use the Techstream to check if the Multiplex Communication System (MPX) is functioning normally (See DIAGNOSTIC TROUBLE CODE CHART )

      Result 

      RESULT REFERENCE
      
      

      Result	Proceed to
      MPX DTC is not output	A
      MPX DTC is output	B

   B: GO TO MULTIPLEX COMMUNICATION SYSTEM  (See DIAGNOSTIC TROUBLE CODE CHART )

   A: Go to next Step 

5. CHECK LIN COMMUNICATION SYSTEM* 
   1. Use the Techstream to check if the LIN Communication System (LIN) is functioning normally (See DIAGNOSIS SYSTEM ).

      Result 

      RESULT REFERENCE
      
      

      Result	Proceed to
      LIN Communication DTC is not output	A
      LIN Communication DTC is output	B

   B: GO TO LIN COMMUNICATION SYSTEM  (See DIAGNOSTIC TROUBLE CODE CHART )

   A: Go to next Step 

6. CHECK FOR DTC* 
   1. Check for DTC and note any codes that are output (See DIAGNOSIS SYSTEM  ).
   2. Clear the DTC
   3. Recheck for DTCs

      Result 

      RESULT REFERENCE
      
      

      Result	Proceed to
      DTC does not reoccur	A
      DTC reoccurs	B

   B: GO TO DIAGNOSTIC TROUBLE CODE CHART 

   A: Go to next Step 

7. INSPECT BASIC OPERATION 
   1. Turn the engine switch on (START) and check that the engine starts normally Make sure the brake pedal is depressed and the shift position is in P at this time.
   2. Check that the engine switch mode can be changed by pushing the engine switch

      HINT

      Without depressing the brake pedal, push the engine switch repeatedly Engine switch mode should turn from off to on (ACC) to on (IG) and back to off.

      With the brake pedal depressed, push the engine switch repeatedly Engine switch mode should turn to ENGINE START from any status

      OK: Engine can start normally. 

8. PROBLEM SYMPTOMS TABLE 

   Result 

   RESULT REFERENCE
   
   

   Result	Proceed to
   Fault is not listed in the problem symptoms table	A
   Fault is listed in the problem symptoms table	B

   B: Go to step  10

   A: Go to next Step 

9. OVERALL ANALYSIS AND TROUBLESHOOTING* 
   1. Terminals of ECU (See TERMINALS OF ECU  )
   2. Data List / Active Test (See DIAGNOSIS SYSTEM  )
10. REPAIR OR REPLACE 
11. CONFIRMATION TEST 

    NEXT: END