GM Service Manual Online
For 1990-2009 cars only

Electronic Brake Control Module (EBCM)

Scan Tool Output Control

Additional Menu Selection(s)

Description

Automated Bleed

--

Used in order 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.

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 Outlet Valve Solenoid

Solenoid Test

Commands the solenoid ON and OFF.

Normal Mode Eavesdrop

--

Monitors the serial data messages that relate to system operation. The normal mode eavesdrop is a list of data parameters. For the list of the parameters located in the normal mode eavesdrop, refer to Scan Tool Data List and Scan Tool Data Definitions . 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.

Pump Motor Test

--

Commands the pump motor ON and OFF.

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.

RR Inlet Valve Solenoid

Solenoid Test

Commands the solenoid ON and OFF.

RR Outlet Valve Solenoid

Solenoid Test

Commands the solenoid ON and OFF.

Steering Position Sensor Test

--

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

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.