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