Hummer H2. Manual - part 2211

DTC C0696 

Circuit Description 

With the ignition switch in the on position the current draw of both Air Suspension Sensors and the Air 
Suspension Pressure Sensor is verified by the Air Suspension Module to be within a calibrated range. If the 
current draw is out of range a DTC is set. 

Conditions for Running the DTC 

The ignition is on. 

Conditions for Setting the DTC 

8

Testing for Intermittent Conditions and Poor Connections 
and to Wiring Repairs in Wiring Systems. 
Did you find and correct the condition?

Go to Step 

13

Go to Step 11

9

Inspect for poor connections at the harness connector of the 
Air Suspension Module. Refer to Testing for Intermittent 
Conditions and Poor Connections and to Wiring Repairs in 
Wiring Systems. 
Did you find and correct the condition?

Go to Step 

13

Go to Step 12

10

Repair the ground circuit of the exhaust valve. Refer to Wiring 
Repairs in Wiring Systems. 
Did you complete the repair?

Go to Step 

13

-

11

Replace the Air Suspension Exhaust Valve. Refer to 
Compressor Automatic Level Control Replacement . 
Did you complete the replacement?

Go to Step 

13

-

12

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?

IMPORTANT:

Always perform the check trim height procedure after Air 
Suspension Module replacement.

Go to Step 

13

-

13

1. Use the scan tool in order to clear the DTCs.  

2. Operate the vehicle within the Conditions for Running 

the DTC.  

Does the DTC reset?

Go to Step 2

System OK

 

2004 Hummer H2 

2004 SUSPENSION Air Suspension - Hummer H2

  

The Air Suspension Module detects that the current drawn by the Air Suspension Sensors and Air Suspension 
Pressure Sensor is below 3 mA. or above 40 mA. 

Action Taken When the DTC Sets 

z

Air Suspension functionality is suspended.  

z

SERVICE AIR SUSPENSION message is displayed.  

Conditions for Clearing the DTC 

DTC is cleared by cycling ignition. 

Test Description 

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

2: Test Air Suspension Sensor current.  

3: Test the wiring for the overcurrent condition.  

4: Tests for the component that is creating the overcurrent.  

DTC C0696 

Step

Action

Values

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, observe the Height 

Sensor Current parameter in the data list 
for the air suspension module.  

Is the Height Sensor Current parameter within 
the specified range?

3-40 

mA

Go to Testing for 

Intermittent 

Conditions and Poor 

Connections in Wiring 

Systems

Go to Step 3

3

1. Turn OFF the ignition.  

2. Disconnect the Air Suspension Sensor - 

LR, Air Suspension Sensor - RR and the 
Air Suspension Pressure Sensor.  

3. Turn ON the ignition, with the engine 

OFF.  

4. With a scan tool, observe the Height 

Sensor Current parameter.  

40 mA

 

2004 Hummer H2 

2004 SUSPENSION Air Suspension - Hummer H2

  

Is the Height Sensor Current parameter less 
than the specified value?

Go to Step 4

Go to Step 5

4

Reconnect the Air Suspension Sensors and Air 
Suspension Pressure Sensor one at a time 
while observing the Height Sensor Current 
parameter. 
Is the Height Sensor Current parameter greater 
than the specified value when any of the 
components are reconnected?

40 mA

Go to Step 6

Go to Step 7

5

Test the 5 volt reference circuit of the Air 
suspension Sensors and Air Suspension 
Pressure Sensor for a short to ground. Refer to 
Circuit Testing and to Wiring Repairs in 
Wiring Systems. 
Did you find and correct the condition?

-

Go to Step 10

Go to Step 7

6

Inspect for poor connections at the harness 
connector of the Air Suspension Sensors and 
Air Suspension Pressure Sensor. Refer to 
Circuit Testing and to Wiring Repairs in 
Wiring Systems. 
Did you find and correct the condition?

-

Go to Step 10

Go to Step 8

7

Inspect for poor connections at the harness 
connector of the Air Suspension Module. Refer 
to Testing for Intermittent Conditions and 
Poor Connections in Wiring Systems. 
Did you find and correct the condition?

-

Go to Step 10

Go to Step 9

8

Replace the Air Suspension sensor or Pressure 
sensor. Refer to Air Spring Leveling Sensor 
Replacement or Valve Automatic Level 
Control Solenoid Replacement . 
Did you complete the replacement?

-

Go to Step 10

-

9

1. Replace the Air Suspension module. 

Refer to Module Assembly Electronic 
Suspension Control Replacement .  

2. Recalibrate the trim height in the Air 

Suspension Module if necessary after 
replacement.  

Did you complete the replacement?

IMPORTANT:

Always perform the trim height check 
procedure after Air Suspension Module 
replacement.

-

Go to Step 10

-

1. Use the scan tool in order to clear the 

 

2004 Hummer H2 

2004 SUSPENSION Air Suspension - Hummer H2

  

DTC C0702 

Circuit Description 

During the key ON self test of the air suspension system the air suspension inlet valves, exhaust valve, and 
electronically controlled air suspension relay are actuated and the voltage draw is calculated by the Air 
Suspension Control Module. 

Conditions for Running the DTC 

Ignition ON 

Conditions for Setting the DTC 

Air suspension module senses general valve voltage does not agree with command state. 

Action Taken When the DTC Sets 

z

Air suspension functionality is suspended.  

z

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 general valve circuitry is shorted to ground, voltage and open. 

Test Description 

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

2: During the air suspension exhaust valve operation, listen for an audible click. Command the ON and 
the OFF states. Repeat the commands as necessary.  

3: Verifies that the air suspension module is providing voltage to the air suspension exhaust valve.  

4: Tests for an open in the ground circuit to the air suspension exhaust valve.  

5: Tests for constant voltage to the air suspension exhaust valve.  

DTC C0702 

10

DTCs.  

2. Operate the vehicle within the 

Conditions for Running the DTC.  

Does the DTC reset?

-

Go to Step 2

System OK

 

2004 Hummer H2 

2004 SUSPENSION Air Suspension - Hummer H2