How To Proceed With Troubleshooting

HINT:

• Use these procedures to troubleshoot the LIN communication system.
• *: Use the Techstream.

1. VEHICLE BROUGHT TO WORKSHOP 
2. INSPECT BATTERY VOLTAGE 

   Standard voltage: 

   11 to 14 V 

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

3. CHECK FOR DTC (ELECTRICAL POWER CONTROL SYSTEM)* 
   1. Using the Techstream, check if the electric power control system is functioning normally.

   Result: 

   RESULT TABLE
   
   

   Result	Proceed to
   DTC B22B3 is not output	A
   DTC B22B3 is output	B

   B: GO TO ELECTRIC POWER CONTROL SYSTEM  (See DIAGNOSTIC TROUBLE CODE TABLE )

   A: Go to next step 

4. INSPECT COMMUNICATION FUNCTION OF CAN COMMUNICATION SYSTEM* 
   1. Using the Techstream, inspect the CAN communication function to ensure there are no malfunctions in the communication system (see CAN COMMUNICATION SYSTEM ).

   Result: 

   RESULT TABLE
   
   

   Result	Proceed to
   No DTCs output	A
   DTCs output	B

   B:  Go to CAN COMMUNICATION SYSTEM

   A: Go to next step 

5. INSPECT COMMUNICATION FUNCTION OF LIN COMMUNICATION SYSTEM* 
   1. Using the Techstream, inspect the LIN communication function to ensure there are no malfunctions in the communication system.

   Result: 

   RESULT TABLE
   
   

   Result	Proceed to
   No DTCs output	A
   DTCs output	B

   B: SEE  DIAGNOSTIC TROUBLE CODE TABLE  

   A: Go to next step 

6. PROBLEM SYMPTOMS TABLE 

   Result: 

   RESULT TABLE
   
   

   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 DATA LIST/ACTIVE TEST 
   2. See TERMINALS OF ECU 
8. ADJUST, REPAIR OR REPLACE 

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