GM Service Manual Online
For 1990-2009 cars only
Table 1: Body Control Module Scan Tool Data Parameters
Table 2: Body Control Module Scan Tool Output Controls

Body Control Module Scan Tool Data Parameters

Parameter

Expected Value

Definition

Operating Conditions: Engine ON

ACC Gap Switch

Inactive

The scan tool displays Up, Down or Inactive. This is the state of the adaptive cruise control (ACC) gap switch.

ACC Gap Switch

Varies

This displays Volts. This is the current voltage at the adaptive cruise control (ACC) gap switch.

Accessory Switch

Active

The scan tool displays Active or Inactive. This is the state of the accessory switch.

Accy. Indicator Command

Off

The scan tool displays On or Off. This is the state of the accessory indicator.

Accy. Relay Command

Off

The scan tool displays On or Off. This is the state of the accessory relay.

ALC Switch

Off

The scan tool displays On or Off. This is the state of the automatic lamp control (ALC) switch.

Auto. Trans. Equipped

Varies

The scan tool displays Yes or No. Yes is displayed if automatic transmission is equipped on the vehicle.

Auxiliary Power

Off

The scan tool displays On or Off. This is the state of the auxiliary power.

Backup Lamp Relay Cmd.

Off

The scan tool displays On or Off. This is the state of the backup lamp relay.

Battery Voltage Signal

Varies

This displays Volts. This is the current battery system voltage.

BPP Sensor

Varies

This displays Volts. This is the current brake pedal position (BPP) sensor voltage signal.

BPP Sensor Reference

Varies

This displays Volts. This is the current brake pedal position (BPP) sensor reference voltage signal.

BPPS High During Learn

No

The scan tool displays Yes or No. Yes is displayed if the brake pedal position sensor (BPPS) was high during the learn procedure.

BPPS Learned Home Position

Varies

This displays Counts. This is the brake pedal position sensor (BPPS) learned home position measured in counts.

BPPS Low During Learn

No

The scan tool displays Yes or No. Yes is displayed if the brake pedal position sensor (BPPS) was low during the learn procedure.

BPPS Move During Learn

No

The scan tool displays Yes or No. Yes is displayed if the brake pedal position sensor (BPPS) was moved during the learn procedure.

BPPS Status

Valid

The scan tool displays Valid, Invalid or Unlearned. This is the state of the brake pedal position sensor (BPPS).

Brake Apply Sensor Reference Signal

Varies

This displays Volts. This is the current brake pedal position (BPP) sensor reference voltage signal.

Column Lock Relay Command

Off

The scan tool displays On or Off. This is the state of the column lock relay.

Column Lock Relay Signal

Off

The scan tool displays On or Off. This is the state of the column lock relay signal.

Content Theft Previous Arm State

Varies

The scan tool displays Active or Inactive.

Content Theft System Status

Varies

The scan tool displays Disabled, Intent to Arm, Closed Dr. Wait, Arm Simulate, Trunk Accessed, Armed Disabled, Triggers Active, Triggers Inactiv, Arm Delay, Simulated, Armed, Pre-alarm, Alarm Siren or Alarm Visible. This is the current state of the content theft system.

Cruise

Disabled

The scan tool displays Enabled or Disabled. This is the state of the cruise system.

Cruise Control Sw. to Batt. Voltage Ratio

Varies

This displays %. This is the voltage ratio between the cruise control switch and battery voltage.

Cruise Control Switch

Off

The scan tool displays On, Off, Resume, Set or Error. This is the current state of the cruise control switch.

Cruise Control Switch

Varies

This displays Volts. This is the current voltage at the cruise control switch.

Current Power Mode

Run

The scan tool displays Off, Accessory, Run or Crank Request. This is the current position of the ignition switch.

Day/Night Status

Varies

The scan tool displays Day, Night, Delay Off, or Off.

DRL Status

Varies

The scan tool displays On or Off. This is the state of the daytime running lamps (DRL).

Engine Type

Varies

The scan tool displays LH2, LS2, LS7, LC3, LS3 or LS9. This is the type of engine on the vehicle.

Export Alarm

Varies

The scan tool displays Equipped or Not Equipped. Equipped is displayed if an export alarm is installed on the vehicle.

Export Fog Lamp Equipped

Varies

The scan tool displays Yes or No. Yes is displayed if export fog lamps are installed on the vehicle.

Export Intrusion Alarm

Varies

The scan tool displays Equipped or Not Equipped. Equipped is displayed if an export intrusion alarm system is installed on the vehicle.

Exterior Lights

Varies

The scan tool displays USA or Canada.

Flash to Pass Switch

Inactive

The scan tool displays Active or Inactive. This is the state of the flash to pass switch.

Fog Lamp Relay Cmd.

Off

The scan tool displays On or Off. This is the state of the fog lamp relay.

Folding Top Equipped

Varies

The scan tool displays Yes or No. Yes is displayed if a folding top is installed on the vehicle.

Front Fog Lamp Equipped

Varies

The scan tool displays Yes or No. Yes is displayed if front fog lamps are installed on the vehicle.

Front Fog Lamp Switch

Inactive

The scan tool displays Active or Inactive. This is the state of the front fog lamp switch.

Hazard Lamp Switch

Inactive

The scan tool displays Active or Inactive. This is the state of the hazard lamp switch.

Headlamp Off Switch

Off

The scan tool displays On or Off. This is the state of the headlamp off switch.

Headlamp On Switch

Off

The scan tool displays On or Off. This is the state of the headlamp on switch.

Headlamp Wash

Present

The scan tool displays Present or Not Present. This is the status of the headlamp wash.

Head Up Display

Varies

The scan tool displays Equipped or Not Equipped. Equipped is displayed if a head up display (HUD) is installed on the vehicle.

High Beam Relay Command

Off

The scan tool displays On or Off. This is the state of the high beam relay.

High Beam Select Switch

Inactive

The scan tool displays Active or Inactive. This is the state of the high beam select switch.

Horn Relay Command

Off

The scan tool displays On or Off. This is the state of the horn relay.

HVAC Option

Varies

The scan tool displays C68 or CJ2. This is the type of HVAC installed on the vehicle.

Idle Boost Level

Varies

This displays percent. This is the state of the idle boost level percentage.

Ign. Mode Sw. Dimming Command

Varies

The scan tool displays On or Off. This is the state of the ignition mode switch dimming command.

Ignition Mode Switch

Varies

This displays Volts. This is the current ignition mode switch voltage.

Inadvertent Power Signal

Varies

The scan tool displays Active or Inactive. This is the state of the inadvertent power signal.

Inadvertent Power Cmd.

Varies

The scan tool displays On or Off. This is the state of the inadvertent power command.

Key in Cylinder Switch

Active

The scan tool displays Active or Inactive. This is the state of the key in the ignition cylinder.

Learn in Progress

No

The scan tool displays Yes or No. Yes is displayed if the brake pedal position sensor is learning the home position.

Left Turn Signal Switch

Inactive

The scan tool displays Active or Inactive. This is the state of the left turn signal switch.

LF Door Ajar Switch

Varies

The scan tool displays Ajar or Door Closed. This is the current state of the driver door ajar switch.

LF Door Open Switch

Varies

The scan tool displays Key Off or Door Open. This is the current state of the driver door open switch.

LF Latch Solenoid Command

Inactive

The scan tool displays Active or Inactive. This is the current state of the driver front latch solenoid.

LF Turn Lamp/DRL Status

Off

The scan tool displays On or Off. This is the state of the driver front turn lamp/DRL.

LF Turn/Hazard Lamp Command

Off

The scan tool displays On or Off. This is the state of the driver front turn/hazard lamp.

Low Beam DRL Equipped

Varies

The scan tool displays Yes or No. Yes is displayed if low beam daytime running lamps are equipped on the vehicle.

Low Beam Relay Command

Off

The scan tool displays On or Off. This is the state of the low beam relay.

LR Turn Lamp/DRL Status

Off

The scan tool displays On or Off. This is the state of the driver rear turn lamp/DRL.

LR Turn/Hazard Lamp Command

Off

The scan tool displays On or Off. This is the state of the driver rear turn/hazard lamp.

Memory Option AAB

Not Present

The scan tool displays Present or Not Present.

Off Indicator Command

Off

The scan tool displays On or Off. This is the state of the off indicator.

OnStar

Varies

The scan tool displays Yes or No. Yes is displayed if OnStar is equipped on the vehicle.

Park Brake Solenoid A Command

Off

The scan tool displays On or Off. This is the state of the park brake solenoid A.

Park Brake Solenoid B Command

Off

The scan tool displays On or Off. This is the state of the park brake solenoid B.

Park Lamp Override

Varies

The scan tool displays USA or Canada.

Park Lamp Relay Cmd.

Off

The scan tool displays On or Off. This is the state of the park lamp relay.

Park Lamp Switch

Off

The scan tool displays On or Off. This is the state of the park lamp switch.

Park Switch (Auto)

Varies

The scan tool displays Active or Inactive. This is the state of the park switch.

Passive Arming

Varies

The scan tool displays Enabled or Disabled. This is the state of the passive arming.

Perimeter Lighting

Varies

The scan tool displays Enabled or Disabled. This is the state of the perimeter lighting.

Point of Sale

Varies

The scan tool displays USA, Canada, Europe, Japan, Gulf States, Mexico, Guam, Kuwait, Saudi Arabia or Africa.

Rain Sensor

Varies

The scan tool displays Present or Not Present. Present is displayed if a rain sensor is equipped on the vehicle.

Rear Fog Lamp Equipped

Varies

The scan tool displays Yes or No. Yes is displayed if rear fog lamps are equipped on the vehicle.

Rear Fog Lamp Relay Cmd.

Off

The scan tool displays On or Off. This is the state of the rear fog lamp relay.

Rear Fog Lamp Switch

Inactive

The scan tool displays Active or Inactive. This is the state of the rear fog lamp switch.

Rear Stop/Turn Lamps

Varies

The scan tool displays Combined or Not Combined. Combined is displayed if the rear stop lamps are combined with the turn lamps.

RF Door Ajar Switch

Door Closed

The scan tool displays Ajar or Door Closed. This is the current state of the passenger door ajar switch.

RF Door Open Switch

Varies

The scan tool displays Key Off or Door Open. This is the current state of the driver passenger door open switch.

RF Latch Solenoid Command

Inactive

The scan tool displays Active or Inactive. This is the state of the passenger door latch solenoid.

RF Turn Lamp/DRL Status

Off

The scan tool displays On or Off. This is the state of the passenger front turn lamp/DRL.

RF Turn/Hazard Lamp Command

Off

The scan tool displays On or Off. This is the state of the passenger front turn/hazard lamp.

RFA Equipped

Varies

The scan tool displays Yes or No. Yes is displayed if a remote function actuator (RFA) is equipped on the vehicle.

RFA Light Feedback

Varies

The scan tool displays Enabled or Disabled. This is the state of the remote function actuator (RFA) light feedback.

RFA Lock Horn Feedback

Varies

The scan tool displays Enabled or Disabled. This is the state of the remote function actuator (RFA) lock horn feedback.

RFA Unlock Horn Feedback

Varies

The scan tool displays Enabled or Disabled. This is the state of the remote function actuator (RFA) unlock horn feedback.

Right Turn Signal Switch

Inactive

The scan tool displays Active or Inactive. This is the state of the right turn signal switch.

RR Turn Lamp/DRL Status

Off

The scan tool displays On or Off. This is the state of the passenger rear turn lamp/DRL.

RR Turn/Hazard Lamp Command

Off

The scan tool displays On or Off. This is the state of the passenger rear turn/hazard lamp.

RTD Suspension

Varies

The scan tool displays Present or Not Present. Present is displayed if damping (RTD) suspension is equipped on the vehicle.

Run/Crank Relay Command

Varies

The scan tool displays On or Off. This is the state of the run/crank relay command.

Start Indicator Command

Off

The scan tool displays On or Off. This is the state of the start indicator command.

Steering Column Lock

Varies

The scan tool displays Present or Not Present. Present is displayed if steering column lock is equipped on the vehicle.

Stop Lamp Relay Command

Off

The scan tool displays On or Off. This is the state of the stop lamp relay.

Stop Lamp Status

Off

The scan tool displays On or Off. This is the state of the stop lamps.

TCS Switch

Released

The scan tool displays Release or Pressed. This is the state of the traction control switch.

Theater Dimming Command

Varies

The scan tool displays On or Off. This is the state of the theater dimming.

Tire Inflation Monitor

Varies

The scan tool displays Present or Not Present. Present is displayed if a tire inflation monitor is equipped on the vehicle.

Tire Pressure Monitor

Varies

The scan tool displays Present or Not Present. Present is displayed if a tire pressure monitor is equipped on the vehicle.

Traction Control Equipped

Varies

The scan tool displays Yes or No. Yes is displayed traction control is equipped on the vehicle.

Trunk Ajar Switch

Trunk Closed

The scan tool displays Trunk Ajar or Trunk Closed. This is the state of the trunk ajar switch.

Trunk Key Cylinder Switch

Inactive

The scan tool displays Active or Inactive. This is the state of the trunk key cylinder switch.

Trunk Release Solenoid Command

Off

The scan tool displays On or Off. This is the state of the trunk release solenoid.

Trunk Release Switch

Inactive

The scan tool displays Active or Inactive. This is the state of the trunk release switch.

VSES Equipped

Varies

The scan tool displays Yes or No. Yes is displayed if a vehicle stability enhancement system (VSES) is equipped on the vehicle.

Wiper Relay Cmd.

Off

The scan tool displays On or Off. This is the state of the wiper relay.

Body Control Module Scan Tool Output Controls

Scan Tool Output Control

Description

Accy. Indicator Command

This output control commands the accessory indicator ON or OFF.

Aux. Pwr. Outlet Relay Ctrl.

This output control commands the auxiliary power relay.

Alarm Siren

This output control commands the alarm siren.

Backup Lamp Relay Control

The body control module (BCM) activates the backup lamps for 5 seconds when you select ON. This applies to vehicles equipped with automatic transmissions only.

BCM Setup

This output control is used to setup a new body control module (BCM).

BPP Sensor Calibration

This output control is used to command the BCM to calibrate the brake pedal position (BPP) sensor to zero.

Headlamp Washer

This output control commands the headlamp washer ON or OFF.

Horn Relay

The BCM activates the horn momentarily when you select ON.

LF Latch Solenoid

The BCM commands the LF door latch release on. The left front door latch should release when commanded.

Off Indicator Command

This output control commands the off indicator ON or OFF.

Park Brake Solenoid Relay A

This output control is used to command the park brake solenoid relay A.

Park Brake Solenoid Relay B

This output control is used to command the park brake solenoid relay B.

RF Latch Solenoid

The BCM commands the RF door latch release on. The right front door latch should release when commanded.

Run/Crank Relay Control

This controls the run/crank relay.

Setup SDM Part Number in BCM

This output control is used to set up the SDM part number into the BCM.

Start Indicator Command

This output control commands the start indicator ON or OFF.

Stop Lamp Relay Control

The BCM activates the stop lamps for 5 seconds when you select ON.

Trunk Release

The BCM activates the trunk release solenoid when you select ON.