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 AUXILIARY BATTERY VOLTAGE

Standard voltage:

11 to 14 V

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

NEXT -- Continue to next step.

4. CHECK ECUS CONNECTED TO CAN BUS*

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

Result





B -- Go to CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) How to Proceed With Troubleshooting
A -- Continue to next step.

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

(a) Check for all DTCs.

Result





B -- Go to CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) How to Proceed With Troubleshooting

C -- Go to LIN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) LIN Communication System

D -- Go to DIAGNOSTIC TROUBLE CODE CHART Air Suspension System
A -- Continue to next step.

6. PROBLEM SYMPTOM TABLE

Result





B -- Go to step 8
A -- Continue to next step.

7. OVERALL ANALYSIS AND TROUBLESHOOTING*

(a) DATA LIST / ACTIVE TEST Data List / Active Test

(b) Terminals of ECU Air Suspension System

NEXT -- Continue to next step.

8. REPAIR OR REPLACE

NEXT -- Continue to next step.

9. CONFIRMATION TEST

NEXT -- END