How To Proceed With Troubleshooting

HINT:

• Use these procedures to troubleshoot the dynamic radar cruise control system.
• The intelligent tester should be used at steps 3, 4, 5, and 9.

1. VEHICLE BROUGHT TO WORKSHOP 
2. INSPECT BATTERY VOLTAGE 

   Standard: 

   11 to 14 V 

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

3. CHECK COMMUNICATION FUNCTION OF MULTIPLEX COMMUNICATION SYSTEM (BEAN) 
   1. Use the intelligent tester to check if the Multiplex Communication System (MPX) is functioning normally.

   Result 

   RESULT REFERENCE
   
   

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

   B: Go to  MULTIPLEX COMMUNICATION SYSTEM 

   A: Go to Next Step 

4. CHECK COMMUNICATION FUNCTION OF CONTROLLER AREA NETWORK (CAN) 
   1. Use the intelligent tester to check for normal function of CAN communication system.
      1. Perform bus check (communication malfunction DTC).
      2. Perform bus check (communication bus check).

      Result 

      RESULT REFERENCE
      
      

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

   B: Go to  CAN COMMUNICATION SYSTEM 

   A: Go to Next Step 

5. CHECK FOR DTC 

   Refer to the DTC check/clear (See DTC CHECK / CLEAR ).

   1. Check for DTC and note any codes that are output.
   2. Delete the DTC.
   3. Recheck for DTC. Try to prompt the DTC by simulating the original activity that the DTC suggests.

      Result 

      RESULT REFERENCE
      
      

      Result	Proceed to
      DTC does not reoccur	A
      DTC reoccur	B

   B:  Go to step  8

   A: Go to Next Step 

6. PROBLEM SYMPTOMS TABLE 

   Refer to the problem symptoms table (See PROBLEM SYMPTOMS TABLE ).

   Result 

   RESULT REFERENCE
   
   

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

   B:  Go to step  8

   A: Go to Next Step 

7. OVERALL ANALYSIS AND TROUBLESHOOTING 
   1. See TERMINALS OF ECU 
   2. See DATA LIST / ACTIVE TEST 
8. REPAIR OR REPLACE 
9. CONFIRMATION TEST 

   NEXT: END