Diagnostic Instructions
DTC Descriptor
DTC C0707 00: Excessive Compressor Activity
Circuit Description
The air suspension control module (ASCM) 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
Connector End View Reference
Component Connector End Views
Description and Operation
Air Suspension Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References
for scan tool information
Circuit/System Verification
Ignition ON, command the air suspension compressor ON and OFF with a scan tool output control. The compressor should turn ON and OFF with each command.
Circuit/System Testing
- Verify that there are no air leaks in the system.
| ⇒ | If a leak is found, repair or replace the leaking component as necessary. |
- Remove the ECAS relay from the underhood fuse block. Verify that the compressor runs continuously.
| ⇒ | If the compressor does not run continuously, test or replace the relay. |
- Ignition ON, verify that a test lamp does not illuminate between the compressor B+ terminal 87 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
after completing the diagnostic procedure.
