How To Proceed With Troubleshooting

HINT:

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

1. VEHICLE BROUGHT TO WORKSHOP 
2. INSPECT BATTERY VOLTAGE 

   Standard voltage: 

   11 to 14 V 

   If the voltage is below 11 V, 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 CHART
      
      

      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 CAN COMMUNICATION SYSTEM* 
   1. Use the intelligent tester to check if the CAN communication system is functioning normally.

      Result 

      RESULT REFERENCE CHART
      
      

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

   B:  GO TO CAN COMMUNICATION SYSTEM

   A: GO TO Next Step 

5. CHECK FOR DTC* 
   1. Check for DTC (see DTC CHECK / CLEAR  ).
   2. Clear the DTC (see DTC CHECK / CLEAR  ).
   3. Recheck for DTC (see DTC CHECK / CLEAR  ).

      Result 

      RESULT REFERENCE CHART
      
      

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

   B:  GO TO step  8

   A: GO TO Next Step 

6. PROBLEM SYMPTOMS TABLE 

   Refer to the PROBLEM SYMPTOMS TABLE  .

   Result 

   RESULT REFERENCE 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  8

   A: GO TO Next Step 

7. OVERALL ANALYSIS AND TROUBLESHOOTING* 
   1. Operation check (see OPERATION CHECK  ).
   2. Terminals of ECU (see TERMINALS OF ECU  ).
   3. DATA LIST / ACTIVE TEST (see DATA LIST / ACTIVE TEST  ).
8. ADJUST, REPAIR OR REPLACE 
   NOTE:

   • When the distance control ECU is replaced with a new one, initialization must be performed (see INSTALLATION  ).
   • When the millimeter wave radar sensor is replaced with a new one, adjustment of the radar sensor beam axis must be performed (see ADJUSTMENT  ).
9. CONFIRMATION TEST 

   END