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. INSPECT BATTERY VOLTAGE 

   Standard voltage: 10 to 14 V 

   If the voltage is below 10 V, recharge or replace the battery before proceeding.

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

      Result: 

      RESULT 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 INDICATOR LIGHT 
5. CHECK DTC* 
   1. Check for DTC and note any codes that are output.
   2. Delete the DTC.
   3. Recheck for DTCs, and try to prompt the DTC by simulating the original activity that the DTC suggests.

      Result 

      RESULT CHART
      
      

      Result	Proceed to
      DTC does not reoccur	A
      DTC reoccurs	B

   B: Go to step  8

   A: Go to next step. 

6. PROBLEM SYMPTOMS TABLE 

   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  8

   A: Go to next step. 

7. OVERALL ANALYSIS AND TROUBLESHOOTING* 
   1. Terminals of ECM (see TERMINALS OF ECM  )
   2. DATA LIST/ACTIVE TEST (see DATA LIST / ACTIVE TEST  )
8. ADJUST, REPAIR OR REPLACE 
9. CONFIRMATION TEST 

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