Data Display

The scan tool displays the module data. This information assists in determining whether the module is operating properly, and whether the module is sending or receiving the proper data to and from a particular system. The module uses data received from other systems in order to carry out some functions. If the module receives the incorrect data from another system, the module may function improperly. Use the scan tool in order to review the data from the systems that interact with the module.

Displayed Input/Output Status

The scan tool also displays the module input/output status. Select the module input/output status display in order to display the data and determine if the switched inputs/outputs may be properly interpreted. The display also indicates if the input/output has changed states. For example, when a door is closed, the scan tool displays the input status of the door ajar switch as INACTIVE. When the door is open, the scan tool reads ACTIVE. Use this type of information when diagnosing a malfunction associated with a particular module input or an input that is shared with another system.

Control Outputs

Use a scan tool in order to control the module output functions. When the module output control is selected, the scan tool can command the module to turn an output on or off. This feature may be used in order to determine if the module is able to control an output regardless of the inputs or any specific program instructions. Once a test is selected, the scan tool will command the module to energize the selected output. The scan tool then displays the status of the selected output. The displayed information represents only what was module commanded, not what action was actually taken. Verify that the module is performing each of the selected output functions.

Scan Tool Menus

Refer to the Scan Tool Manual for complete information on scan tool diagnostics.

Diagnostic Trouble Codes (DTC)

The diagnostic trouble codes (DTC) function has the following 3 modes:

DTC Information: Current or history DTCs stored by the EBCM/EBTCM may be displayed.

DTC History: Displays the conditions under which a history DTC was set.

Clear DTC Information: Current or history DTCs stored by the EBCM/EBTCM may be cleared.

Data Display (1) Diagnostics

The data display (1) diagnostics function has the following 3 modes:

A brief description of data display (1) diagnostics parameters available on the scan tool are listed below:

Controller Information:

System ID: Scan tool displays: hexadecimal - Display indicates the system ID.

Controller Part Number: Scan tool displays: part number - Display indicates the part number of the EBCM/EBTCM.

Build Sequence Number: Scan tool displays: number - Display indicates the number in order that the EBCM/EBTCM was built.

Julian Date of Build: Scan tool displays: day/year - Display indicates the day and year which the EBCM/EBTCM was built.

ABS Controller: Scan tool displays: Yes/No - Display indicates if the vehicle is equipped with ABS.

TCS Controller: Scan tool displays: Yes/No - Display indicates if the vehicle is equipped with TCS.

TIM Controller: Scan tool displays: Yes/No - Display indicates if the vehicle is equipped with tire pressure monitoring.

Magna Steer Controller: Scan tool displays: Yes/No - Display indicates if the vehicle is equipped with Magna Steer®.

Data List 1:

Vehicle Speed: Scan tool displays: Km/h or mph - Display indicates vehicle speed from the average of all four wheel speeds.

Left Front Wheel Speed: Scan tool displays: Km/h or mph - Display indicates the actual speed of the left front wheel.

Right Front Wheel Speed: Scan tool displays: Km/h or mph - Display indicates the actual speed of the right front wheel.

Left Rear Wheel Speed: Scan tool displays: Km/h or mph - Display indicates the actual speed of the left rear wheel.

Right Rear Wheel Speed: Scan tool displays: Km/h or mph - Display indicates the actual speed of the right rear wheel.

Rough Road Parameter: Scan tool displays: G - Display indicates the EBCM/EBTCM calculation of the road surface, this information is sent to the PCM over the serial data class 2. The PCM uses this information for misfire detection.

RR Outlet Solenoid: Scan tool displays: Inactive/Active - Display indicates the state of the solenoid valve.

RR Inlet Solenoid: Scan tool displays: Inactive/Active - Display indicates the state of the solenoid valve.

LR Inlet Solenoid: Scan tool displays: Inactive/Active - Display indicates the state of the solenoid valve.

LR Outlet Solenoid: Scan tool displays: Inactive/Active - Display indicates the state of the solenoid valve.

RF Outlet Solenoid: Scan tool displays: Inactive/Active - Display indicates the state of the solenoid valve.

RF Inlet Solenoid: Scan tool displays: Inactive/Active - Display indicates the state of the solenoid valve.

LF Outlet Solenoid: Scan tool displays: Inactive/Active - Display indicates the state of the solenoid valve.

LF Inlet Solenoid: Scan tool displays: Inactive/Active - Display indicates the state of the solenoid valve.

LF TCS Prime Valve: Scan tool displays: Inactive/Active - Display indicates the state of the solenoid valve.

LF TCS Isolation Valve: Scan tool displays: Inactive/Active - Display indicates the state of the solenoid valve.

RF TCS Prime Valve: Scan tool displays: Inactive/Active - Display indicates the state of the solenoid valve.

RF TCS Isolation Valve: Scan tool displays: Inactive/Active - Display indicates the state of the solenoid valve.

Data List 2:

Brake Light Switch: Scan tool displays: Applied/Released - Display indicates the state of the brake switch.

ABS Failed: Scan tool displays: Yes/No - Display indicates if ABS is inactive do to a malfunction.

ABS Active: Scan tool displays: Yes/No - Display indicates if ABS is currently active.

ABS Warning Lamp: Scan tool displays: Off/On - Display indicates if ABS Warning Lamp is currently active.

TCS On/Off Switch: Scan tool displays: Off/On - Display indicates the state of the traction control switch.

TCS Active: Scan tool displays: Yes/No - Display indicates if TCS is currently active.

TCS Active Lamp: Scan tool displays: Off/On - Display indicates if TCS Active Lamp is currently active.

TCS Failed: Scan tool displays: Yes/No - Display indicates if TCS is inactive do to a malfunction.

TCS Disabled Lamp: Scan tool displays: Off/On - Display indicates if TCS Disabled Lamp is currently active.

TCS Warning Lamp: Scan tool displays: Off/On - Display indicates if TCS Warning Lamp is currently active.

Requested Torque: Scan tool displays: Percent - Display indicates how much torque the EBCM/EBTCM is requesting the PCM to deliver.

Delivered Torque: Scan tool displays: Percent - Display indicates how much torque the PCM is delivering.

Brake Thermal Model Exceeded: Scan tool displays: Yes/No - Display indicates if the brake rotor temperature is above the thermal cutoff.

LF Rotor Temperature: Scan tool displays: °C or °F - Display indicates the temperature of the left front brake rotor.

RF Rotor Temperature: Scan tool displays: °C or °F - Display indicates the temperature of the right front brake rotor.

TIM Failed: Scan tool displays: Yes/No - Display indicates if tire pressure monitoring is inactive do to a malfunction.

Low Tire Pressure: Scan tool displays: Yes/No - Display indicates if the EBCM/EBTCM has determined that a tire has low pressure.

TIM Reset Switch: Scan tool displays: Off/On - Display indicates the state of the tire pressure monitoring reset switch.

Magna Steer Failed: Scan tool displays: Yes/No - Display indicates if Magna Steer® is inactive due to a malfunction.

Magna Steer Warning Lamp: Scan tool displays: Off/On - Display indicates if Magna Steer® Warning Lamp is currently active.

Magna Steer Commanded Current: Scan tool displays: amps - Display indicates the amount of current the EBCM/EBTCM is commanding to the Magna Steer® actuator.

Magna Steer Feedback Current: Scan tool displays: amps - Display indicates the actual current that was sent to the Magna Steer® actuator.

Ignition Power: Scan tool displays: Volts - Display indicates the level of ignition voltage at the EBCM/EBTCM.

Switched System Battery Power: Scan tool displays: Volts - Display indicates the voltage available to the solenoid valves and the pump motor control relay coil when the solenoid valve control relay is energized.

Switched Pump Battery Power: Scan tool displays: Volts - Display indicates the voltage available to the pump motor when the pump motor control relay is energized.

Solenoid Relay Commanded State: Scan tool displays: On/Off - Display indicates the commanded state of the valve relay.

Solenoid Relay Feedback State: Scan tool displays: On/Off - Display indicates the state of the valve relay.

Motor Relay Commanded State: Scan tool displays: On/Off - Display indicates the commanded state of the valve relay.

Motor Relay Feedback State: Scan tool displays: On/Off - Display indicates the state of the valve relay.

Data Display (2) Normal Mode

The Data Display (2) Normal Mode parameters available on the scan tool are listed below:

Brake Switch - ABS Input: Scan tool displays: Applied/Released - Display indicates the state of the brake switch as seen by the EBCM/EBTCM.

Brake Switch - PCM Input: Scan tool displays: Applied/Released - Display indicates the state of the brake switch as seen by the PCM.

ABS Failed Lamp Command: Scan tool displays: Yes/No - Display indicates if the ABS Failed Lamp has been commanded to be on.

Traction Control Equipped: Scan tool displays: Yes/No - Display indicates if Traction Control is equipped.

Traction Off Lamp Command: Scan tool displays: Yes/No - Display indicates if the Traction Off Lamp has been commanded to be on.

Traction Active Message Command: Scan tool displays: Yes/No - Display indicates if the Traction Active Message has been commanded to be on.

Traction Failed Lamp Command: Scan tool displays: Yes/No - Display indicates if the Traction Failed Lamp has been commanded to be on.

Temporary Inhibit of TCS: Scan tool displays: Yes/No - Display indicates if TCS has been temporarily inhibited.

Powertrain TCS Failure: Scan tool displays: Yes/No - Display indicates if TCS is inactive due to a powertrain malfunction.

System Power Mode: Scan tool displays: Off/On/Acc/Start - Display indicates the power mode of the vehicle.

State of Health Present: Scan tool displays: Yes/No - Display indicates whether the EBCM/EBTCM is receiving the appropriate state of health messages.

Snapshot

In this test mode, the scan tool captures the data listed in the data displays before and after a snapshot-triggering condition which may or may not set a DTC.

Special Functions

In this test mode, the scan tool may be used in order to perform functional tests on the system which help verify proper operation. Malfunction conditions may be further identified by testing and observing the test results. You must clear any DTCs before any tests in Special Functions may be performed. The Special Functions are grouped in the following manner:

The Special Functions are detailed below.

Solenoid Test-Pressure Hold

This test activates the selected wheel circuit inlet valve, placing the valve in the pressure hold position. When the valve is in the pressure hold position, the valve will not allow master cylinder pressure to be delivered to the hydraulic wheel circuit. This is done under actual operating conditions when the EBCM/EBTCM determines that the wheel is moving too slowly. The EBCM/EBTCM holds additional master cylinder pressure from the hydraulic wheel circuit in an attempt to allow the circuit to rotate at an appropriate speed. The scan tool commands the valve to close. This should allow the technician to spin the wheel even though an assistant is applying pressure to the brake pedal. Perform the following test:

1. Turn the ignition switch to the OFF position.
2. Connect a scan tool to the data link connector (DLC).
3. Turn the ignition switch to the ON position.
4. Raise the vehicle. Ensure that all of the wheels are about 15 cm (6 in) off of the floor.
5. Place the gear selector in the NEUTRAL position.
6. Select the Special Functions from the ABS/TCS menu.
7. Select the Solenoid Test. Have an assistant command Inlet Valve Solenoid of the appropriate wheel using the scan tool.
8. Have the assistant press and hold the brake pedal.
9. Attempt to move the wheel being tested by hand. The wheel should move even though the assistant is applying pressure to the brake pedal. The front wheels may be difficult to turn by hand, but may be moved if the system is working properly.

Solenoid Test-Pressure Release

This test activates the selected hydraulic wheel circuit outlet valves, placing them in the pressure reduce position. When in the pressure reduce position, the valve will allow wheel caliper pressure to be returned to the master cylinder circuit. This is done under actual operating conditions because the EBCM/EBTCM has determined that the wheel is moving too slowly, and holding additional master cylinder pressure from it has not allowed it to rotate at an appropriate speed. The scan tool commands the valves to these positions which should allow the technician to spin the wheel even though an assistant is applying pressure to the brake pedal. Perform the following test:

1. Turn the ignition switch to the OFF position.
2. Connect a scan tool to the data link connector (DLC).
3. Turn the ignition switch to the ON position.
4. Raise the vehicle. Ensure that all of the wheels are about 15 cm (6 in) off of the floor.
5. Place the gear selector in the NEUTRAL position.
6. Select the Special Functions from the ABS/TCS menu.
7. Select the Solenoid Test. Have an assistant command the Outlet Valve Solenoid of the appropriate wheel using the scan tool.
8. Have the assistant press and hold the brake pedal.
9. Attempt to move the wheel being tested by hand. The wheel should move even though the assistant is applying pressure to the brake pedal. The front wheels may be difficult to turn by hand, but may be moved if the system is working properly.

Automated Bleed

The Automated Bleed mode of the scan tool is used during bleeding of the ABS System. Refer to Antilock Brake System Automated Bleed Procedure .

Automated Test

This test cycles each valve solenoid and the pump motor (as well as the necessary relays) in order to verify component operation. This test is identical to the Initialization Sequence. If a malfunction is detected, the EBCM/EBTCM will set DTCs. The DTCs will be displayed upon completion of the test. Perform the following test:

1. Turn the ignition switch to the OFF position.
2. Connect a scan tool to the data link connector (DLC).
3. Turn the ignition switch to the ON position.
4. Select the Special Functions from the ABS/TCS menu.
5. Select the Automated Test.
6. Run the Automated Test.
7. Record any DTCs that were set.

Lamp/Message(s) Test

This test controls the following indicator lamps and DIC messages:

TCS Test

This test runs the pump motor in order to apply fluid pressure to the front wheel circuits.

Perform the following test. This test does NOT require an assistant:

1. Turn the ignition switch to the OFF position.
2. Connect a scan tool to the data link connector (DLC).
3. Turn the ignition switch to the ON position.
4. Raise the vehicle. Ensure that all of the wheels are about 15 cm (6 in) off of the floor.
5. Select the Special Functions from the ABS/TCS menu.
6. Select the TCS Test.
7. Command the TCS Test ON with the scan tool. The pump motor will turn on for approximately 25 seconds.
8. Attempt to move each front wheel by hand. The wheels should not move due to the pump motor running and applying pressure to the front wheels.