This document outlines troubleshooting steps for restoring functionality to the air suspension system on vehicles experiencing issues after an airbag replacement or system malfunction. The air suspension system may enter a protective shutdown mode, preventing the compressor from activating.
Problem
The air suspension system fails to operate after replacing airbags or experiencing a system fault. The compressor does not activate, even when directly powered. Error codes related to low pressure, height sensors, and compressor malfunctions may be present.
Solution
Clear the Air Suspension System Error Codes. The system enters a shutdown mode and will not function until the codes are cleared.
Method 1: Using Diagnostic Tool
- Connect a diagnostic tool (e.g., Techstream, ScanGauge) to the vehicle’s OBDII port.
- Access the air suspension system module.
- Clear all stored error codes related to the air suspension.
- After clearing the codes, turn the vehicle off, then back on and allow the system time to initialize and observe the system for normal operation.
Method 2: Manual Code Clearing (Alternative Method)
- Locate the DLC3 connector (Data Link Connector 3).
- Short terminals 13 and 4 on the DLC3 connector to retrieve fault codes (observe flashing lights).
- Once the lights are flashing, press the brake pedal 8 times. A beeping noise should indicate that the system reset procedure has initiated.
- Turn the vehicle off, then back on and allow the system time to initialize and observe the system for normal operation.
Relevant Parts
- Diagnostic tool (Techstream or similar)
- DLC3 Connector
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