Hummer H3. Manual — part 629

SCAN TOOL DATA LIST

Scan Tool Data List

Solenoid Tests

Left Front
Isolation
Valve

Left Front
Dump Valve

Right Front
Isolation
Valve

Right Front
Dump Valve

Rear Isolation
Valve

Rear Dump
Valve

EBCM and BPMV.

Dump Valve Solenoid Test Procedure

1. Apply the parking brake fully.

2. Start the engine and allow the engine to idle.

3. Select the desired Dump Valve Solenoid Test

on the scan tool.

4. Apply the brake and maintain steady pressure

on the brake pedal.

5. Command the solenoid On and verify that the

brake pedal drops to the floor.

Isolation Valve Solenoid Test Procedure

1. Apply the parking brake fully.

2. Start the engine and allow the engine to idle.

3. Select the desired Isolation Valve Solenoid

Test on the scan tool.

4. Apply the brake with very light pressure only

enough to close the brake switch.

5. Command the solenoid On and then

immediately apply firm and steady pressure to
the brake pedal.

6. The EBCM automatically de-energizes the

solenoid after about 3 seconds. When this
occurs, verify that the brake pedal drops about
2.2 cm (1 inch).

Scan Tool Parameter

Data List

Units Displayed

Typical Data

Value

Ignition ON, Engine OFF and Brake Released

4WD Status

ABS

Two wheel drive/Four wheel

drive

4WD

ABS Active

ABS/VSES

Yes/No

No

2007 Hummer H3

2007 BRAKES Antilock Brake System - H3

ABS Lamp Command

ABS/VSES

On/Off

Off

ABS Pump Motor

ABS/VSES

On/Off

Off

ABS Relay Command

ABS/VSES

On/Off

ON

ABS Stop State

VSES

On/Off

Off

Accum. Pressure Sensor

ABS/VSES

MPa/psi

Varies

Analog Steering Position
Sensor

VSES

°

Varies

Battery Voltage

ABS

Volts

12.0 Volts

Brake Fluid Level

ABS/VSES

OK/Low

OK

Brake Switch Status

ABS/VSES

On/Off

Off

Brake Warning Lamp
Command

VSES

On/Off

Off

Delivered Torque

ABS

%

Varies

Digital Steering Position
Sensor

VSES

°

Varies

Lateral Accelerometer Input

VSES

m/s -ft/s

0

Left Front Wheel Speed

ABS

km/h or mph

0 km/h/0 mph

Left Rear Wheel Speed

ABS

km/h or mph

0 km/h/0 mph

LF Dump Valve Command

ABS/VSES

On/Off

Off

LF Iso. Valve Command

ABS/VSES

On/Off

Off

LR Dump Valve Command

ABS/VSES

On/Off

Off

LR Iso. Valve Command

ABS/VSES

On/Off

Off

Longitudinal Accelerometer
Sensor Signal

ABS

m/s

2

or ft/s

2

Varies

Master Cylinder Pressure
Sensor Input

ABS/VSES

kPa or Psi

0

Requested Torque

ABS

%

90%

Reverse Switch

ABS/VSES

On/Off

Off

RF Dump Valve Command

ABS/VSES

On/Off

Off

RF Iso. Valve Command

ABS/VSES

On/Off

Off

RR Dump Valve Command

ABS/VSES

On/Off

Off

RR Iso. Valve Command

ABS/VSES

On/Off

Off

RF Dump Valve Command

ABS/VSES

On/Off

Off

RF ISO Valve Command

ABS/VSES

On/Off

Off

Right Front Wheel Speed

ABS

km/h or mph

0 km/h/0 mph

2007 Hummer H3

2007 BRAKES Antilock Brake System - H3

SCAN TOOL DATA DEFINITIONS

The ABS scan tool data definitions contain a brief description of all ABS related parameters
available on the scan tool. The parameters available on the scan tool are listed below in
alphanumeric order.

4WD Status

The scan tool displays if the vehicle is in 2 wheel drive or 4 wheel drive.

ABS Active

The scan tool displays if the ABS system is performing antilock braking.

ABS Lamp Command

The scan tool displays the commanded state of the ABS warning indicator.

Right Rear Wheel Speed

ABS

km/h or mph

0 km/h/0 mph

Stability System Active

VSES

Yes/No

No

Stability System Enabled

VSES

Yes/No

Yes

System Configuration

ABS/VSES

Invalid/Not Deturmined/Non-

VSES Auto/Non-VSES

Manual/VSES

Varies

System Voltage

VSES

Volts

12 V

TCS Status/EBCM - TCS
Active

ABS/VSES

Yes/No

No

TCS Status/PCM - TCS
Active

ABS/VSES

Yes/No

No

Traction Control Equipped

ABS

Invalid/Disabled/Enabled or

N/A

Enabled

Traction Control Switch

ABS

Yes/No

Yes

Transmission Type

ABS/VSES

Invalid/Not

Determined/Automatic/Manual

Varies

VSES Control Switch

VSES

Invalid/Disabled/Enabled or

N/A

Enabled

VSES Equipped

VSES

Yes/No

Varies

Yaw Rate Sensor Input

VSES

°/sec

0

2007 Hummer H3

2007 BRAKES Antilock Brake System - H3

ABS Pump Motor

The scan tool displays On/Off. The scan tool displays On when the ABS pump motor is
commanded on.

ABS Relay Command

The scan tool displays the commanded state of the ABS system relay.

ABS Stop State

The scan tool displays if the ABS system is performing antilock braking.

Accum. Pressure Sensor

The scan tool displays brake fluid pressure stored in the accumulator.

Analog Steering Position Sensor

The scan tool displays the analog steering position angle in degrees.

Battery Voltage

The scan tool displays the approximate voltage supplied by the battery and charging system.

Brake Fluid Level

The scan tool displays if the brake fluid is Low or OK.

Brake Switch Status

The scan tool displays the state of the brake switch.

Brake Warning Lamp Command

The scan tool displays ON when the EBCM requests illumination of the brake warning
indicator.

Delivered Torque

The scan tool displays between 11% and 90%. The PCM provides the percentage of engine
torque that is currently applied to the wheels. The lower the percentage the less torque

2007 Hummer H3

2007 BRAKES Antilock Brake System - H3