How To Proceed With Troubleshooting

SUSPENSION CONTROL: AIR SUSPENSION SYSTEM: HOW TO PROCEED WITH TROUBLESHOOTING

HINT
Use these procedures to troubleshoot the air suspension system.

*: Use the Techstream.

1. VEHICLE BROUGHT TO WORKSHOP

NEXT -- Continue to next step.

2. PROBLEM SYMPTOM CONFIRMATION

NEXT -- Continue to next step.

3. INSPECT BATTERY VOLTAGE

Standard voltage:

11 to 14 V

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

NEXT -- Continue to next step.

4. CHECK FOR DTC (ELECTRIC POWER CONTROL SYSTEM)*

(a) Using the Techstream, check if the electric power control system is functioning normally Reading and Clearing Diagnostic Trouble Codes.

Result





(b) Using the Techstream, check the electric power control system's load control history Operation Check.

B -- Go to ELECTRIC POWER CONTROL SYSTEM
A -- Continue to next step.

5. CHECK ECUS CONNECTED TO CAN BUS*

(a) Check ECUs connected to CAN bus Diagnosis System.

Result





B -- Go to CAN COMMUNICATION SYSTEM
A -- Continue to next step.

6. CHECK DTC (CAN AND LIN COMMUNICATION SYSTEM)*

(a) Check for DTCs.

Result





B -- Go to CAN COMMUNICATION SYSTEM

C -- Go to LIN COMMUNICATION SYSTEM

D -- Go to DTC CHART
A -- Continue to next step.

7. PROBLEM SYMPTOM TABLE

Result





B -- Go to step 10
A -- Continue to next step.

8. OVERALL ANALYSIS AND TROUBLESHOOTING*

(a) Data List / Active Test Data List / Active Test

(b) Terminals of ECU Pinout Values and Diagnostic Parameters

NEXT -- Continue to next step.

9. REPAIR OR REPLACE

NEXT -- Continue to next step.

10. CONFIRMATION TEST

NEXT -- END