Normal Mode Eavesdrop

This test is used to monitor the class 2 serial data messages that relate to the DRP/ABS/TCS/TIM/VSES (if equipped). Only the parameters of the options that the vehicle is equipped will be displayed. 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 class 2 serial data message that relates to the individual parameter. Otherwise, the scan tool displays all asterisks next to each parameter.
Phase 1-4 The following is a list of parameters for Phase 1-4 listed in alphabetical order.
ABS Failed Lamp Command: Displays Off or On. Indicates if the EBCM is commanding the ABS indicator ON.
ABS Reference Speed: Displays 0 to 255 km/h (0 to 159 mph). The vehicle speed from the average of all four wheel speeds.
Engine RPM: Displays from 0 to 9999 rpm. The crankshaft rotation speed.
Engine Type: Displays the type of the engine in the vehicle.
Estimated Trans. Gear: Displays Park, Reverse, Neutral, First, Second, Third, or Fourth. The estimated state of the transmission gear.
Extended Travel Brake Switch: Displays Applied or Released. The state of the extended travel brake switch.
Intake Air Temperature: Displays -40°C to 151°C (-40°F to 304°F). The temperature of the intake manifold air.
Lateral Acceleration: Displays -1.2 to 1.2 g. The lateral acceleration from the lateral accelerometer signal.
Low Tire Pressure: Displays Yes or No. Indicates if the EBCM has determined that a tire has low pressure.
Powertrain TCS Failure: Displays Yes or No. Indicates if -the PCM has suspended TCS due to a malfunction related to TCS.
Red Brake Warning Indicator: Displays Off or On. Indicates if the EBCM is commanding the red BRAKE warning indicator ON.
Rough Road Parameter: Displays 0 to 1 g. The EBCM calculation of the road surface, this information is sent to the PCM over the class 2 serial data line. The PCM uses this information for misfire detection.
Service Stability System: Displays Off or On. Indicates if the EBCM is commanding the SERVICE STABILITY SYSTEM message to be displayed on the DIC.
State of Health Present: Displays Yes or No. Indicates if -the EBCM is sending the proper state of health messages.
Stop Lamp Switch: Displays Applied or Released. The state of the brake switch.
System Power Mode: Displays Run, Crank, Accessory, Unlock, Off Awake, RAP Unlock, or RAP. The state of the ignition as reported by the Dash Integration Module (DIM).
TCC/Brake Switch Active: Displays Yes or No. Indicates whether the TCC/brake switch is applied
TCS Equipped: Displays Yes or No. Indicates if the vehicle is equipped with TCS.
TCS Failed Lamp Command: Displays Off or On. Indicates if the EBCM is commanding the TRACTION OFF indicator ON.
Temporary Inhibit of TCS: Displays Yes or No. Indicates if the EBCM has suspended TCS due to a malfunction or the driver using the traction control switch.
TPS - Pedal Position: Displays 0 to 100%. The throttle angle. The display should read 0% at idle and 100% at wide open throttle.
Transmission Type: Displays the type of the transmission in the vehicle.
VIN Packet #2: Displays the VIN packet #2.
VSES Active: Displays Yes or No. Indicates if the VSES is currently active.
VSES Equipped: Displays Yes or No. Indicates if the vehicle is equipped with VSES.
No Phase The following is a list of parameters for No Phase listed in alphabetical order.
ABS Active Indicator: Displays Off or On. Indicates if the ABS active indicator is currently ON.
Low Tire Pressure Reset Switch: Displays Was Pressed. Indicates if the tire pressure reset switch was pressed.
Stability System Active: Displays Off or On. Indicates if the EBCM is commanding the STABILITY SYSTEM ACTIVE message to be displayed by the DIC.
TCS Active Message Command: Displays Off or On. Indicates if the EBCM is commanding the TRACTION CONTROL SYSTEM ACTIVE message to be displayed by the DIC.
TCS Off Lamp Command: Displays Off or On. Indicates if the EBCM is commanding the TRACTION OFF indicator ON due to the traction control switch.
TCS On/Off Switch: Displays Was Pressed. Indicates if the traction control switch was pressed.
Traction Ready Message Comm.: Displays Off or On. Indicates if the EBCM is commanding the TRACTION OFF indicator OFF due to the traction control switch.
Traction Suspended Message Comm.: Displays Off or On. Indicates if the EBCM is commanding the TRACTION OFF indicator ON due to the Brake Thermal Model fault.