GM Service Manual Online
For 1990-2009 cars only
Table 1: Electronic Brake Control Module (EBCM)
Table 2: Body Control Module (BCM)
Table 3: Instrument Panel Cluster (IPC)
Table 4: Powertrain Control Module (PCM)

Electronic Brake Control Module (EBCM)

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Ignition ON, Engine OFF, and Steering Wheel Straight

ABS Active

ABS Data

Yes/No

No

Brake Pressure Sensor

TCS/VSES Data

PSI/KPA

Varies

Brake Pressure Sensor Input

ABS Data

Volts

Varies

Brake Temp Status

ABS/TCS/VSES Data

Normal/Over Temp

Normal

DRP Active

ABS

Yes/No

No

DRP Disabled

ABS

Yes/No

No

Ignition Voltage Signal

ABS/TCS/VSES Data

Volts

12

Lateral Accelerometer Signal

VSES Data

g

0

Lateral Accelerometer Signal

VSES Data

Volts

2.5

Left TCS Isolation Solenoid Command

TCS Data

Off/On

Off

Left TCS Prime Solenoid Command

TCS Data

Off/On

Off

LF Wheel Speed Sensor

ABS/TCS/VSES Data

km/h or mph

0

LR Wheel Speed Sensor

ABS/TCS/VSES Data

km/h or mph

0

Pump Motor Relay Command

ABS Data

Off/On

Off

Pump Motor Relay Feedback Signal

ABS Data

Off/On

Off

Right TCS Isolation Solenoid Command

TCS Data

Off/On

Off

Right TCS Prime Solenoid Command

TCS Data

Off/On

Off

RF Wheel Speed Sensor

ABS/TCS/VSES Data

km/h or mph

0

Rough Road Detected

TCS Data

g

0

RR Wheel Speed Sensor

ABS/TCS/VSES Data

km/h or mph

0

Solenoid Relay Command

ABS Data

Off/On

Off

Steering Position Sensor

VSES Data

°

Varies

Steering Sensor is Centered

VSES Data

Yes/No

No

Switched Battery Voltage Signal

ABS/TCS/VSES Data

Volts

12

SWPS Signal 1

VSES Data

Volts

Varies

SWPS Signal 2

VSES Data

Volts

Varies

TCS Active

TCS Data

Yes/No

No

TCS Enable

TCS Data

Yes/No

Yes

Vehicle Speed

ABS/TCS/VSES Data

Km/h/mph

0

VSES Active

VSES Data

Yes/No

No

VSES Enable

VSES Data

Yes/No

Yes

Yaw Rate Sensor

VSES Data

°/sec

0

Yaw Rate Signal

VSES Data

Volts

2.5

Body Control Module (BCM)

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Ignition ON, Engine OFF

Brake Fluid Level Switch

IPC

Off/On

Off

TCS Switch

BCM

Released/Pressed

Released

Park Brake Switch

IPC

Released/Set

Released

Instrument Panel Cluster (IPC)

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Ignition ON, Engine OFF

Brake Fluid Level Switch

IPC

Off/On

Off

Powertrain Control Module (PCM)

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Ignition ON, Engine OFF

Initial Brake Apply Signal

PCM Data

Released/Applied

Released

Moderate Brake Apply Signal

PCM Data

Released/Applied

Released

Stoplamp Pedal Switch

PCM Data

Released/Applied

Released

Stoplamp Pedal Switch Signal

PCM Data

Volts

Varies

Traction Control Status

PCM Data

Active/Inactive

Inactive

Torque Request Signal

PCM Data

%

90