How To Proceed With Troubleshooting

HINT:

Use these procedures to troubleshoot the air suspension system.

*: Use the 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 Techstream, check if the electric power control system is functioning normally, (see DTC CHECK/CLEAR ).

      Result 

      RESULT TABLE
      
      

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

   2. Using the Techstream, 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 

   RESULT TABLE
   
   

   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 

   RESULT TABLE
   
   

   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 TABLE 

   A: Go to next step 

7. PROBLEM SYMPTOM 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  10

   A: Go to next step 

8. OVERALL ANALYSIS AND TROUBLESHOOTING* 
   1. See DATA LIST/ACTIVE TEST 
   2. See TERMINALS OF ECU 
9. REPAIR OR REPLACE 
10. CONFIRMATION TEST 

NEXT: END