How To Proceed With Troubleshooting

HINT: 

• Use these procedures to troubleshoot the engine immobilizer system.

• *: Use the Techstream.

1. VEHICLE BROUGHT TO WORKSHOP 

   NEXT: Go to next step 

2. INSPECT AUXILIARY BATTERY VOLTAGE 

   Standard Voltage

   11 to 14 V

   • If the voltage is below 11 V, recharge or replace the auxiliary battery before proceeding to the next step.

   NEXT: Go to next step 

3. TURN POWER SWITCH ON (IG) 

   HINT: 

   If the power switch cannot be turned on (IG), communication with the Techstream can be confirmed by connecting the Techstream to the vehicle and turning a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the Techstream and vehicle begins.

   NEXT: Go to next step 

4. CHECK COMMUNICATION FUNCTION OF CAN COMMUNICATION SYSTEM* 
   1. Use the Techstream to check if the CAN communication system is functioning normally. Refer to DIAGNOSIS SYSTEM .
      RESULT
      
      

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

      B → GO TO CAN COMMUNICATION SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING 

      A: Go to next step 

5. CHECK COMMUNICATION FUNCTION OF LIN COMMUNICATION SYSTEM* 
   1. Use the Techstream to check if the LIN communication system is functioning normally. Refer to DTC CHECK / CLEAR .
      RESULT
      
      

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

      B → GO TO LIN COMMUNICATION SYSTEM. Refer to  DIAGNOSTIC TROUBLE CODE CHART 

      A: Go to next step 

6. CHECK FOR DTC* 
   1. Check for DTCs and make a note of any codes that are output. Refer to DTC CHECK / CLEAR .
   2. Based on the DTCs output above, proceed to each diagnostic procedure.
      RESULT
      
      

      Result	Proceed to
      DTC is not output	A
      Hybrid control system DTC is output	B
      Electronic shift lever system DTC is output	C
      Engine immobilizer system DTC is output	D

      B → Go to DIAGNOSTIC TROUBLE CODE CHART. Refer to  DIAGNOSTIC TROUBLE CODE CHART 

      C → Go to DIAGNOSTIC TROUBLE CODE CHART. Refer to  DIAGNOSTIC TROUBLE CODE CHART 

      D → Go to DIAGNOSTIC TROUBLE CODE CHART. Refer to  DIAGNOSTIC TROUBLE CODE CHART  

      A: Go to next step 

7. PROBLEM SYMPTOMS TABLE 
   1. Refer to Problem Symptoms Table. Refer to PROBLEM SYMPTOMS TABLE .
      RESULT
      
      

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

      B → Go to step 9 

      A: Go to next step 

8. OVERALL ANALYSIS AND TROUBLESHOOTING* 
   1. Check Data List / Active Test. Refer to DATA LIST / ACTIVE TEST .
   2. Check Terminals of ECU. Refer to TERMINALS OF ECU .

      NEXT: Go to next step 

9. ADJUST, REPAIR OR REPLACE 

   NEXT: Go to next step 

10. CHECK FOR DTC* 
    1. Clear the DTCs. Refer to DTC CHECK / CLEAR .
    2. Check for DTCs. Refer to DTC CHECK / CLEAR .

       HINT: 

       Before checking for DTCs, perform the "DTC Output Confirmation Operation" of each diagnostic procedure. Refer to DIAGNOSTIC TROUBLE CODE CHART .

       RESULT
       
       

       Result	Proceed to
       DTC is not output	A
       Engine immobilizer system DTC is output	B

       B → Go to DIAGNOSTIC TROUBLE CODE CHART. Refer to  DIAGNOSTIC TROUBLE CODE CHART  

       A → END