Hummer H2. Manual — part 2207

Range 10.0 - 16.0 V. Voltage measured by the suspension control module.

Compressor Relay

Indicates when the compressor relay is activated.

Compressor Temperature

Identifies when the compressor thermal trip has set.

Door Switch

Indicates if any doors or the hatch is open.

Engine Running

Indicates if the engine is running.

ERH Lamp Command

Indicates when the ERH lamp is commanded on.

ERH Switch

Indicates when the ERH switch is pressed.

Height Sensor Current

Indicates the current of the 5 volt reference circuit for both height sensors and the pressure sensor.

Height Sensor Supply Status

Indicates if the 5 volt reference circuit for both height sensors and the pressure sensor is active.

Ignition

Indicates when the ignition is on or off.

Ignition 3

Indicates switched voltage at the suspension module.

Inflator Switch

Indicates when the inflator switch is pressed.

2004 Hummer H2

2004 SUSPENSION Air Suspension - Hummer H2

Inflator Switch Lamp Command

Indicates when the inflator switch lamp is commanded on.

Left Height Sensor

Range 0.5 - 4.85 V. Indicates the vehicle height measured in volts.

Left Isolation Valve

Indicates when the inlet valve is active.

Neutral Switch

Indicates when the shifter is in neutral.

Number of DTCs

Indicates the number of DTCs set in the suspension module.

Park Switch

Indicates when the shifter is in park.

Ride Height Status

Indicates if the vehicle is in extended or normal ride height.

Right Height Sensor

Range 0.5 - 4.85 V. Indicates the vehicle height measured in volts.

Right Isolation Valve

Indicates when the inlet valve is active.

Total Valve Current

Indicates the total current that the inlet valves, exhaust valve, and compressor relay are using.

Tow/Haul Mode

Indicates when the transmission is in the tow/haul mode.

Trim Height Learned

2004 Hummer H2

2004 SUSPENSION Air Suspension - Hummer H2

Indicates if the trim height was learned after the calibration procedure.

Vehicle Speed

Indicates the speed of the vehicle.

DIAGNOSTIC TROUBLE CODE (DTC) LIST

Diagnostic Trouble Code (DTC) List

DTC B2795

Circuit Description

The air suspension module monitors the ride height switch signal circuit for a short to ground or battery with
ignition on and up to 3 minutes with the ignition OFF.

Conditions for Running the DTC

Ignition ON or OFF.

Conditions for Setting the DTC

The air suspension module senses the ride height switch signal circuit voltage is shorted to ground or battery.

Action Taken When the DTC Sets

z

A DTC is set.

DTC

Diagnostic Procedure

Modules

B2795

DTC B2795

ASM

C0550

DTC C0550

ASM

C0563

DTC C0563

ASM

C0569

DTC C0569

ASM

C0626

DTC C0626

ASM

C0631

DTC C0631

ASM

C0660

DTC C0660

ASM

C0696

DTC C0696

ASM

C0702

DTC C0702

ASM

C0707

DTC C0707

ASM

C0711

DTC C0711

ASM

C0712

DTC C0712

ASM

C0713

DTC C0713

ASM

C0716

DTC C0716

ASM

C0717

DTC C0717

ASM

2004 Hummer H2

2004 SUSPENSION Air Suspension - Hummer H2

z

No 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 ride height switch circuitry is shorted to ground, voltage and open.

Test Description

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

2: This step tests for normal scan tool data parameters.

3: This step tests for data parameter change with scan tool.

4: This step tests the signal circuit to be inactive.

DTC B2795

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, observe the ERH Switch parameter in

the data list for the air suspension module.

Does the scan tool display released?

Go to Step 3

Go to Step 4

3

1. Activate the ERH switch.

2. With the scan tool, observe the ERH Switch parameter.

Does the ERH Switch parameter change state?

Go to

Diagnostic

Aids

Go to Step 4

4

1. Turn OFF the ignition.

2. Disconnect the ERH switch.

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

4. With a scan tool, observe the ERH Switch parameter.

Does the scan tool display released?

Go to Step 7

Go to Step 5

5

Test the signal circuit of the ERH switch for a short to battery,
ground or an open circuit. Refer to Circuit Testing and to
Wiring Repairs in Wiring Systems.

Go to Step

2004 Hummer H2

2004 SUSPENSION Air Suspension - Hummer H2