How To Proceed With Troubleshooting

HINT: 

• Use the following procedures to troubleshoot the cruise control system.
• *: Use the Techstream.

1. VEHICLE BROUGHT TO WORKSHOP 

   NEXT: Go to next step 

2. PROBLEM SYMPTOM CONFIRMATION 

   NEXT: Go to next step 

3. CHECK MULTIPLEX COMMUNICATION SYSTEM* 

   Refer to HOW TO PROCEED WITH TROUBLESHOOTING. Refer to HOW TO PROCEED WITH TROUBLESHOOTING .

   1. Check for output DTCs.

      Result

      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. Refer to PRECAUTION .

   1. Check for output DTCs.

      Result

      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. Refer to DTC CHECK/CLEAR .

   NEXT: Go to next step 

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

   Result

   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. Refer to DIAGNOSTIC TROUBLE CODE CHART .

   NEXT → GO TO STEP 11 

8. PROBLEM SYMPTOM CONFIRMATION 

   Result

   Result	Proceed to
   Symptom occurs	A
   Symptom does not occur	B

   A → GO TO STEP 10 

   B: Go to next step 

9. SYMPTOM SIMULATION 

   Refer to the ELECTRONIC CIRCUIT INSPECTION PROCEDURE. Refer to ELECTRONIC CIRCUIT INSPECTION PROCEDURE .

   NEXT → Go to step 8 

10. PROBLEM SYMPTOMS TABLE 

    Refer to the PROBLEM SYMPTOMS TABLE. Refer to PROBLEM SYMPTOMS TABLE .

    NEXT: Go to next step 

11. CIRCUIT INSPECTION 

    NEXT: Go to next step 

12. TERMINALS OF ECM 

    Refer to TERMINALS OF ECM. Refer to TERMINALS OF ECM .

    NEXT: Go to next step 

13. IDENTIFICATION OF PROBLEM 

    NEXT: Go to next step 

14. REPAIR OR REPLACE 

    NEXT: Go to next step 

15. CONFIRMATION TEST 

    NEXT → END