C0707

DTC C0707

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (Initial Inspection and Diagnostic Overview) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (Initial Inspection and Diagnostic Overview) for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions (Initial Inspection and Diagnostic Overview) provides an overview of each diagnostic category.



DTC Descriptor
DTC C0707 00
- Excessive Compressor Activity




Circuit Description

The air suspension control module monitors the run time of the compressor. If the compressor has run for more than 1 hour during an ignition cycle, the air suspension control module switches OFF the compressor relay. The run timer counts down when the compressor is OFF with the ignition ON.


Conditions for Running the DTC

Battery voltage is between 9-16 volts.


Conditions for Setting the DTC

The air suspension compressor has continuously run for more than 1 hour during the same ignition cycle.


Action Taken When the DTC Sets

* The air suspension system will be inoperative.
* The SERVICE SUSPENSION SYSTEM message will be displayed.



Conditions for Clearing the MIL/DTC

* When the fault is no longer present, DTC C0707 will change from a current DTC to a history DTC on the next ignition cycle.
* DTC C0770 will be cleared from history after 50 ignition cycles.



Reference Information
Schematic Reference

Air Suspension Schematics (Air Suspension)
Connector End View Reference

Component Connector End Views (Connector Views)
Description and Operation

Air Suspension Description and Operation (Air Suspension Description and Operation)
Electrical Information Reference

* Circuit Testing (Component Tests and General Diagnostics)
* Connector Repairs (Component Tests and General Diagnostics)
* Testing for Intermittent Conditions and Poor Connections (Component Tests and General Diagnostics)
* Wiring Repairs (Component Tests and General Diagnostics)

Scan Tool Reference

Programming and Relearning (Programming and Relearning) for scan tool information


Circuit/System Verification

Ignition ON, command the air suspension compressor ON and OFF with the scan tool output control. The compressor should turn ON and OFF with each command.


Circuit/System Testing

1. Verify that there are no air leaks in the system.

• If a leak is found, repair or replace the leaking component as necessary.

2. Remove the ELC CMPRSR relay from the rear fuse block. Verify that the compressor runs continuously.

• If the compressor does not run continuously, test or replace the relay.

3. Ignition ON, verify that a test lamp does not illuminate between the compressor B+ terminal of the relay connector and ground.

• If the test lamp illuminates, test the B+ circuit for a short to voltage. If the circuits test normal, replace the air suspension control module.




Repair Instructions

Perform the Diagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.

* Air Spring Replacement (Service and Repair)
* Air Suspension Air Line Replacement (Air Suspension Air Line Replacement)
* Air Spring Compressor Replacement (Air Spring Compressor Replacement)
* Suspension Position Calibration (Programming and Relearning)
* Programming and Relearning (Programming and Relearning) for air suspension control module replacement, setup, and programming