GM Service Manual Online
For 1990-2009 cars only
Table 1: Body Control Module (BCM)
Table 2: Electronic Brake Control Module (EBCM)
Table 3: Powertrain Control Module (PCM)

Body Control Module (BCM)

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Ignition ON, Engine OFF, and Vehicle is Stationary

Brake Fluid Level Sensor

BCM Data

Yes/No

OK/Low

ETS Switch

BCM Data

On/Off

Off

Electronic Brake Control Module (EBCM)

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Ignition ON, Engine OFF, and Vehicle is Stationary

ABS Active

EBCM Data

Yes/No

No

ABS Warning Lamp

EBCM Data

On/Off

Off

Ignition Voltage

EBCM Data

Volts

B+

LF Inlet Solenoid Command

EBCM Data

On/Off

Off

LF Outlet Solenoid Command

EBCM Data

On/Off

Off

LF Wheel Speed Sensor

EBCM Data

mph/km/h

0

LR Inlet Solenoid Command

EBCM Data

On/Off

Off

LR Outlet Solenoid Command

EBCM Data

On/Off

Off

LR Wheel Speed Sensor

EBCM Data

mph/km/h

0

Pump Motor Command

EBCM Data

On/Off

Off

Pump Motor Feedback Signal

EBCM Data

On/Off

Off

RF Inlet Solenoid Command

EBCM Data

On/Off

Off

RF Outlet Solenoid Command

EBCM Data

On/Off

Off

RF Wheel Speed Sensor

EBCM Data

mph/km/h

0

RR Inlet Solenoid Command

EBCM Data

On/Off

Off

RR Outlet Solenoid Command

EBCM Data

On/Off

Off

RR Wheel Speed Sensor

EBCM Data

mph/km/h

0

Rough Road Parameter

EBCM Data

g

Varies

Solenoid Relay Feedback Signal

EBCM Data

On/Off

On

Solenoid Relay Command

EBCM Data

On/Off

On

Traction Active Lamp

EBCM Data

On/Off

Off

Traction Disabled

EBCM Data

Yes/No

No

Traction Off Lamp

EBCM Data

On/Off

Off

Vehicle Speed

EBCM Data

mph/km/h

0

Powertrain Control Module (PCM)

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Ignition ON, Engine OFF, and Vehicle is Stationary

Torque Request Signal

PCM Data

%

90

Traction Control Status

PCM Data

Active/Inactive

Inactive

Vehicle Speed

PCM Data

mph/km/h

0