Scan Tool Output Controls. Chevrolet Astro

For 1990-2009 cars only

Makes 🢒 Chevrolet 🢒 2005 🢒 Astro - 4WD 🢒 Vehicle Control Systems 🢒 Vehicle DTC Information 🢒 Scan Tool Output Controls

Scan Tool Output Control

Additional Menu Selection(s)

Description

Refer to the Scan Tool Manual for complete scan tool operating instructions.

Function Test

The EBCM commands the system relay, valve solenoids and pump motor on and off. The EBCM will set a DTC(s) if a malfunction is detected.

Automated Bleed

The EBCM commands each valve solenoid and the pump motor on and off in a special sequence in order to bleed air out of the BPMV. Refer to Antilock Brake System Automated Bleed Procedure for a step-by-step procedure.

ABS Motor

This function allows the technician to command the ABS pump motor on and off. The EBCM will set a DTC(s) if a malfunction is detected.

System Identification

The scan tool displays the hardware and software revision of the EBCM.

Tire Size Calibration

•	Read Tire Calibration

•	New Tire Size

This function allows the technician to read the tire size calibration of the EBCM or calibrate the EBCM to the correct tire size. Calibration must be performed when the EBCM is replaced or when different size tires are installed on the vehicle.

Important: The PCM must also be programmed with the correct tire size calibration when different size tires are installed on the vehicle. Refer to Service Programming System (SPS) in Programming

Lamp Tests

•

ABS Lamp

•	Brake Lamp

This function allows the technician to command the ABS indicator or the red Brake Warning indicator on and off.

Solenoid Tests

•	Left Front Isolation Valve

•	Left Front Dump Valve

•	Right Front Isolation Valve

•	Right Front Dump Valve

•	Rear Isolation Valve

•	Rear Dump Valve

This function allows the technician to command a selected valve solenoid on and off. Use the procedure below in order to verify proper operation of the EBCM and BPMV.

Solenoid Test Procedure

Raise the vehicle so the wheels are about 15 cm (6 in.) off the floor. Refer to Lifting and Jacking the Vehicle in General Information.
Select the desired Solenoid Test on the scan tool.
Command the solenoid On.
Apply the brake.
Have an assistant attempt to spin the wheel(s) of the brake circuit being tested. The wheel(s) should spin even though the brake is being applied.

Important: Steps 3, 4 and 5 must be performed within a 5 second time period. The EBCM will only energize a solenoid for 5 seconds.

ABS Relay

This function allows the technician to command the system relay on and off. The EBCM will set a DTC(s) if a malfunction is detected.