Hummer H2. Manual — part 2215

Conditions for Setting the DTC

Air Suspension Module senses inlet 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 inlet 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 Left Air Solenoid 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 Left Air Solenoid.

4: Tests for an open in the ground circuit to the Left Air Solenoid.

5: Tests for constant voltage to the Left Air Solenoid.

DTC C0716

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, command the Left Air Solenoid ON

and OFF.

Does the air solenoid turn ON and OFF with each command?

Go to

Diagnostic

Aids

Go to Step 3

1. Turn OFF the ignition.

2. Disconnect the Air Suspension Inlet Valve.

3. Turn ON the ignition, with the engine OFF.

4. Connect a test lamp to ground.

2004 Hummer H2

2004 SUSPENSION Air Suspension - Hummer H2

3

Probe the control circuit of the inlet valve with a test
lamp that is connected to ground.

5. With a scan tool, command the Left Air Solenoid ON

and OFF.

Does the test lamp turn ON and OFF with each command?

Go to Step 4

Go to Step 5

4

1. Connect a test lamp between the control circuit of the

inlet valve and the ground circuit of the inlet valve.

2. With a scan tool, command the Left Air Solenoid ON

and OFF.

Does the test lamp turn ON and OFF with each command?

Go to Step 8

Go to Step 10

5

Does the test lamp remain illuminated with each command?

Go to Step 7

Go to Step 6

6

Test the control circuit of the inlet valve for a short to ground
or an open. Refer to Circuit Testing and to Wiring Repairs in
Wiring Systems.
Did you find and correct the condition?

Go to Step

13

Go to Step 9

7

Test the control circuit of the inlet valve for a short to voltage.
Refer to Circuit Testing and to Wiring Repairs in Wiring
Systems.
Did you find and correct the condition?

Go to Step

13

Go to Step 9

8

Inspect for poor connections at the inlet valve. 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 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 inlet valve. Refer to Wiring
Repairs in Wiring Systems.
Did you complete the repair?

Go to Step

13

-

11

Replace the Air Suspension Inlet Valve. Refer to Valve
Automatic Level Control Solenoid 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 .

IMPORTANT:

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

-

2004 Hummer H2

2004 SUSPENSION Air Suspension - Hummer H2

DTC C0717

Circuit Description

The Air Suspension Inlet Valve - RR is controlled by the Air Suspension Module. The Air Suspension Module
provides a switched path to voltage whenever inlet valve activity is required. The Air Suspension Module
monitors the inlet valve circuity to determine if the voltage level agrees with the command state.

Conditions for Running the DTC

Ignition on.

Conditions for Setting the DTC

Air Suspension Module senses inlet 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 inlet 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 Right Air Solenoid operation, listen for an audible click. Command the ON and the OFF
states. Repeat the commands as necessary.

2. Perform the trim height calibration procedure for the Air

Suspension Module if necessary after check trim height
procedure.

Did you complete the 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

3: Verifies that the Air Suspension Module is providing voltage to the Right Air Solenoid.

4: Tests for an open in the ground circuit to the Right Air Solenoid.

5: Tests for constant voltage to the Right Air Solenoid.

DTC C0717

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, command the Right Air Solenoid ON

and OFF.

Does the air solenoid turn ON and OFF with each command?

Go to

Diagnostic

Aids

Go to Step 3

3

1. Turn OFF the ignition.

2. Disconnect the Air Suspension Inlet Valve.

3. Turn ON the ignition, with the engine OFF.

4. Connect a test lamp to ground.

Probe the control circuit of the inlet valve with a test
lamp that is connected to ground.

5. With a scan tool, command the Right Air Solenoid ON

and OFF.

Does the test lamp turn ON and OFF with each command?

Go to Step 4

Go to Step 5

4

1. Connect a test lamp between the control circuit of the

inlet valve and the ground circuit of the inlet valve.

2. With a scan tool, command the Right Air Solenoid ON

and OFF.

Does the test lamp turn ON and OFF with each command?

Go to Step 8

Go to Step 10

5

Does the test lamp remain illuminated with each command?

Go to Step 7

Go to Step 6

6

Test the control circuit of the inlet valve for a short to ground
or an open. Refer to Circuit Testing and to Wiring Repairs in
Wiring Systems.
Did you find and correct the condition?

Go to Step

13

Go to Step 9

7

Test the control circuit of the inlet valve for a short to voltage.
Refer to Circuit Testing and to Wiring Repairs in Wiring
Systems.

Go to Step

2004 Hummer H2

2004 SUSPENSION Air Suspension - Hummer H2