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 AUXILIARY BATTERY VOLTAGE 

   Standard voltage: 

   11 to 14 V 

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

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

      Result 

      RESULT CHART
      
      

      Result	Proceed to
      Malfunction appears	A
      No malfunction appears	B

   B: Go to CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING)  (See HOW TO PROCEED WITH TROUBLESHOOTING )

   A: Go to next Step 

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

      Result 

      RESULT CHART
      
      

      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 (HOW TO PROCEED WITH TROUBLESHOOTING)  (See HOW TO PROCEED WITH TROUBLESHOOTING )

   C: Go to LIN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING)  (See HOW TO PROCEED WITH TROUBLESHOOTING )

   D: Go to DIAGNOSTIC TROUBLE CODE CHART 

   A: Go to next Step 

6. 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  8

   A: Go to next Step 

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

   NEXT: END