GM Service Manual Online
For 1990-2009 cars only

Electronic Brake Control Module (EBCM)

Scan Tool Output Control

Additional Menu Selection(s)

Description

ABS Failed Lamp Command

Normal Mode Eavesdrop / Phase 1-4

Displays the status of the ABS indicator.

ABS Reference Speed

Normal Mode Eavesdrop / Phase 1-4

Displays the vehicle speed from the average of all four wheel speeds.

Automated Bleed

--

Used to bleed the ABS hydraulics. Refer to Antilock Brake System Automated Bleed Procedure .

Automated Test

--

Cycles each solenoid valve and the pump motor in order to verify component operation. This test is identical to the Initialization Sequence. If a malfunction is detected, the EBCM will set the appropriate DTCs. The DTCs will be displayed upon completion of the test.

CVRSS Equipped

Normal Mode Eavesdrop / Phase 1-4

Indicates if the vehicle is equipped with road sensing suspension.

Engine RPM

Normal Mode Eavesdrop / Phase 1-4

Displays the crankshaft rotation speed.

Engine Type

Normal Mode Eavesdrop / Phase 1-4

Displays the type of engine in the vehicle.

Estimated Trans. Gear

Normal Mode Eavesdrop / Phase 1-4

Displays the estimated state of the transmission gear.

Extended Travel Brake Switch

Normal Mode Eavesdrop / Phase 1-4

Displays the state of the extended travel brakes switch.

Intake Air Temperature

Normal Mode Eavesdrop / Phase 1-4

Displays the temperature of the intake manifold air.

Lateral Acceleration

Normal Mode Eavesdrop / Phase 1-4

Displays the lateral acceleration from the lateral accelerometer signal.

LF Inlet Valve Solenoid

Solenoid Test

Commands the solenoid ON and OFF.

LF Outlet Valve Solenoid

Solenoid Test

Commands the solenoid ON and OFF.

LF TCS Isolation Valve

Solenoid Test

Commands the solenoid ON and OFF.

LF TCS Prime Valve

Solenoid Test

Commands the solenoid ON and OFF.

LR Inlet Valve Solenoid

Solenoid Test

Commands the solenoid ON and OFF.

LR Valve Outlet Solenoid

Solenoid Test

Commands the solenoid ON and OFF.

Normal Force Test

--

Ensures that the wires between the EBCM and electronic suspension control module are not crossed. A message is displayed indicating if the test is passed or if there is a malfunction. The test will not run if any EBCM or electronic suspension control module DTCs are set.

Normal Mode Eavesdrop

--

Monitors the serial data messages that relate to system operation. The normal mode eavesdrop is a list of data parameters. The normal mode eavesdrop function has the following 2 modes:

Phase 1-4

The term phase refers to the ignition switch changing states. The data parameters shown will display a value only when there is a change in the ignition state. Otherwise, the scan tool displays all asterisks next to each parameter.

No Phase

The data parameters shown are not affected by the changing of ignition states. The scan tool will display a value only when there is a serial data message that relates to the individual parameter. Otherwise, the scan tool displays all asterisks next to each parameter.

Powertrain TCS Failure

Normal Mode Eavesdrop / Phase 1-4

Indicates if the PCM has suspended TCS due to a malfunction related to TCS.

Pump Motor Test

--

Commands the pump motor ON and OFF.

Red Brake Warning Indicator

Normal Mode Eavesdrop / Phase 1-4

Displays the status of the Red Brake Warning indicator.

RF Inlet Valve Solenoid

Solenoid Test

Commands the solenoid ON and OFF.

RF Outlet Valve Solenoid

Solenoid Test

Commands the solenoid ON and OFF.

RF TCS Isolation Valve

Solenoid Test

Commands the solenoid ON and OFF.

RF TCS Prime Valve

Solenoid Test

Commands the solenoid ON and OFF.

Rough Road Parameter

Normal Mode Eavesdrop / Phase 1-4

Displays the EBCM calculation of the road surface.

RR Inlet Valve Solenoid

Solenoid Test

Commands the solenoid ON and OFF.

RR Outlet Valve Solenoid

Solenoid Test

Commands the solenoid ON and OFF.

Service Stability System

Normal Mode Eavesdrop / Phase 1-4

Displays the status of the Service Stability System message.

Stability System Active

Normal Mode Eavesdrop / No Phase

Displays the active status of the VSES.

State of Health Present

Normal Mode Eavesdrop / Phase 1-4

Indicates if the EBCM is sending the proper state of health message.

Steering Position Sensor Test

--

Tests the steering wheel position sensor (SWPS) ability to provide a valid input.

Stop Lamp Switch

Normal Mode Eavesdrop / Phase 1-4

Displays the current status of the brake switch.

Suspension Failure Status

Normal Mode Eavesdrop / No Phase

Displays the status of the road sensing suspension.

System Power Mode

Normal Mode Eavesdrop / Phase 1-4

Displays the current state of the ignition as reported by the dash integration module (DIC).

TCC/Brake Switch Active

Normal Mode Eavesdrop / Phase 1-4

Displays the status of the brake switch.

TCS Active Message Command

Normal Mode Eavesdrop / No Phase

Indicates if the EBCM is commanding the Traction Active indicator ON.

TCS Equipped

Normal Mode Eavesdrop / Phase 1-4

Indicates if the vehicle is equipped with TCS.

TCS Failed Lamp Command

Normal Mode Eavesdrop / Phase 1-4

Indicates if the EBCM is commanding the Traction Off indicator ON.

TCS Off Indicator/Message

Normal Mode Eavesdrop / No Phase

Displays the status of the Traction message.

TCS On/Off Switch

Normal Mode Eavesdrop / No Phase

Displays the state of the traction control switch.

TCS On/Off Test

--

Commands the traction control system ON and OFF. Performs the same function as the traction control switch.

TCS Test

--

Runs the pump motor in order to apply fluid pressure to the front wheel circuits.

Temporary Inhibit of TCS

Normal Mode Eavesdrop / Phase 1-4

Indicates if the EBCM has suspended the TCS due to a malfunction of the driver using the traction control switch.

TPS - Pedal Position

Normal Mode Eavesdrop / Phase 1-4

Displays the percentage of throttle that is currently being applied.

Traction Ready Message Command

Normal Mode Eavesdrop / No Phase

Displays the status of the Traction Ready message.

Traction Suspended Message Comm.

Normal Mode Eavesdrop / No Phase

Displays the status of the Traction Suspended message.

Transmission Type

Normal Mode Eavesdrop / Phase 1-4

Displays the type of transmission in the vehicle.

VIN Packet #2

Normal Mode Eavesdrop / Phase 1-4

Displays the VIN packet #2.

VSES Active

Normal Mode Eavesdrop / Phase 1-4

Displays the current status of the VSES.

VSES Equipped

Normal Mode Eavesdrop / Phase 1-4

Indicates if the vehicle is equipped with VSES.