From 08/2009

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

HINT
* Use these procedures to troubleshoot the air suspension system.
* *: Use 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 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.

5. CHECK DTC (AIR SUSPENSION SYSTEM) *

(a) Check for DTCs Reading and Clearing Diagnostic Trouble Codes.

Result:





B -- Go to DTC CHART
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 Scan Tool Testing and Procedures

(b) Terminals of ECU Pinout Values and Diagnostic Parameters

NEXT -- Continue to next step.

8. REPAIR OR REPLACE

NEXT -- Continue to next step.

9. CONFIRMATION TEST

NEXT -- END