How To Proceed With Troubleshooting

HINT: 

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

1. VEHICLE BROUGHT TO WORKSHOP 

   NEXT: Go to next step 

2. INSPECT BATTERY VOLTAGE 

   Standard

   11 to 14 V

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

   NEXT: Go to next step 

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

      Result

      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 Techstream 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	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 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	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 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 8 

   A: Go to next step 

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

      NEXT: Go to next step 

8. ADJUST, REPAIR OR REPLACE 
   NOTE:

   • When the distance control ECU is replaced with a new one, initialization must be performed. Refer to INSTALLATION - Step 4 .
   • When the millimeter wave radar sensor is replaced with a new one, adjustment of the radar sensor beam axis must be performed. Refer to ADJUSTMENT - Step 1 .

   NEXT: Go to next step 

9. CONFIRMATION TEST 

   NEXT → END