How To Proceed With Troubleshooting

HINT:

• Use these procedures to troubleshoot the cruise control system.
• *: Use the intelligent tester.

1. VEHICLE BROUGHT TO WORKSHOP 
2. PROBLEM SYMPTOM CONFIRMATION 
3. CHECK MULTIPLEX COMMUNICATION SYSTEM* 

   Refer to HOW TO PROCEED WITH TROUBLESHOOTING .

   1. Check for output DTCs.

      Result 

      RESULT CHART
      
      

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

      HINT:

      The ECM of this system is connected to the multiplex communication system. Therefore, before starting troubleshooting, make sure to check that there is no trouble in the multiplex communication system.

   B: PROCEED TO "MULTIPLEX COMMUNICATION SYSTEM" 

   A: Go to next step 

4. CHECK CAN COMMUNICATION SYSTEM* 

   Refer to the precaution (see CAN COMMUNICATION SYSTEM ).

   1. Check for output DTCs.

      Result 

      RESULT CHART
      
      

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

      HINT:

      The ECM of this system is connected to the CAN communication system. Therefore, before starting troubleshooting, make sure to check that there is no trouble in the CAN communication system.

   B: PROCEED TO "CAN COMMUNICATION SYSTEM" 

   A: Go to next step 

5. DTC CHECK AND CLEAR* 

   Refer to the DTC CHECK / CLEAR  .

6. DTC CHECK (OTHER THAN MPX AND CAN SYSTEM DTC)* 

   Refer to the DTC CHECK / CLEAR  .

   Result 

   RESULT CHART
   
   

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

   A:  Go to step  8

   B: Go to next step 

7. DTC CHART 

   Refer to the DIAGNOSTIC TROUBLE CODE CHART  .

   NEXT:  Go to step  11

8. PROBLEM SYMPTOM SIMULATION 

   Result 

   RESULT CHART
   
   

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

   B:  Go to step  10

   A: Go to next step 

9. SYMPTOM SIMULATION 

   Refer to the ELECTRONIC CIRCUIT INSPECTION PROCEDURE .

10. PROBLEM SYMPTOMS TABLE 

    Refer to the PROBLEM SYMPTOMS TABLE  .

11. CIRCUIT INSPECTION 

    Refer to DTC P0500 VEHICLE SPEED SENSOR MALFUNCTION; DTC P0503 VEHICLE SPEED SENSOR "A" INTERMITTENT / ERRATIC / HIGH .

    Refer to the TC AND CG TERMINAL CIRCUIT  .

12. TERMINALS OF ECU 

    Refer to the TERMINALS OF ECU  .

13. IDENTIFICATION OF PROBLEM 
14. REPAIR OR REPLACE 
15. CONFIRMATION TEST 

    NEXT: END