How To Proceed With Troubleshooting

HINT:

Use these procedures to troubleshoot the air suspension system.

*: Use the Intelligent tester or Techstream.

1. VEHICLE BROUGHT TO WORKSHOP 
2. PROBLEM SYMPTOM CONFIRMATION 
3. INSPECT BATTERY VOLTAGE 

   Standard voltage: 11 to 14 V 

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

4. CHECK FOR DTC (ELECTRIC POWER CONTROL SYSTEM)* 
   1. Using the Intelligent tester or Techstream, check if the electric power control system is functioning normally. (see DTC CHECK / CLEAR ).

      Result 

      FOR DTC (ELECTRIC POWER CONTROL SYSTEM)
      
      

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

   2. Using the Intelligent tester, check the electric power control system's load control history (see OPERATION CHECK )

   B: Go to ELECTRIC POWER CONTROL SYSTEM

   A: GO TO NEXT STEP 

5. CHECK ECUS CONNECTED TO CAN BUS* 
   1. Check ECUs connected to CAN bus (see DIAGNOSIS SYSTEM ).

      Result 

      ECUS CONNECTED TO CAN BUS
      
      

      Result	Proceed to
      Malfunction appears	A
      No malfunction appears	B

   B: Go to  CAN COMMUNICATION SYSTEM 

   A: GO TO NEXT STEP 

6. CHECK DTC (CAN AND LIN COMMUNICATION SYSTEM)* 
   1. Check for DTCs all.

      Result 

      DTC (CAN AND LIN COMMUNICATION SYSTEM)
      
      

      Result	Proceed to
      DTC is not output	A
      CAN system DTC is output	B
      LIN system DTC is output	C
      Air suspension DTC is output	D

   B: Go to  CAN COMMUNICATION SYSTEM 

   C: Go to  LIN COMMUNICATION SYSTEM 

   D: GO TO DTC CHART  

   A: GO TO NEXT STEP 

7. PROBLEM SYMPTOM 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   10 

   A: GO TO NEXT STEP 

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

    END