GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 HUMMER 🢒 2004 🢒 H2 🢒 Suspension 🢒 Air Suspension 🢒 DTC C0707

Circuit Description

The air suspension 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 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

Ignition ON.

Conditions for Setting the DTC

The compressor run timer has exceeded 1 hour of run time.

Action Taken When the DTC Sets
    • The air suspension functionality is suspended.
    • SERVICE AIR SUSPENSION message is displayed.

Conditions for Clearing the DTC

The DTC will clear when the condition for setting the DTC is removed.

Diagnostic Aids

This DTC is set when the compressor has run to long.

Test Description

The numbers below refer to the step numbers on the diagnostic table.

  1. This step tests whether the condition is module, system, or condition related.

    2.

  2. This step tests if the condition has been corrected or identified as specified in the supporting text.

    3.

  3. This step tests if the DTC sets during normal operating conditions.

Step

Action

Yes

No

Schematic Reference: Suspension Controls Schematics

1

Did you perform the Air Suspension Diagnostic System Check?

Go to Step 2

Go to Diagnostic System Check - Air Suspension

2
  1. Install a scan tool.
  2. Turn ON the ignition, with the engine OFF.
  3. With a scan tool, monitor the DTC Information for DTC C0707 in the air suspension module.

Does the scan tool indicate that DTC C0707 is current?

Go to Step 4

Go to Step 3

3

Most occurrences of this DTC are caused by long run times of the compressor. Review the air suspension system with the customer to verify the conditions under which the DTC set.

Did vehicle operation cause this DTC to set?

Go to Diagnostic Aids

Go to Step 4

4

  1. Use the scan tool in order to clear the DTCs.
  2. Operate the vehicle within normal operating conditions.

Does the DTC reset?

Go to Step 5

System OK

5

Replace the air suspension compressor. Refer to Compressor Assembly Automatic Level Control Air Replacement .

Did you complete the replacement?

Go to Step 6

--

6

  1. Use the scan tool in order to clear the DTCs.
  2. Operate the vehicle within normal operating conditions.

Does the DTC reset?

Go to Step 7

System OK

7

Important: Always perform the check trim height procedure after air suspension module replacement.

  1. Replace the air suspension module. Refer to Module Assembly Electronic Suspension Control Replacement .
  2. Perform the trim height calibration procedure for the air suspension module if necessary after check trim height procedure.

Did you complete the replacement?

System OK

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