GM Service Manual Online
For 1990-2009 cars only
Table 1: Body Control Module (BCM)
Table 2: Driver Door Switch
Table 3: Engine Control Module (ECM)
Table 4: Instrument Panel Cluster (IPC)
Table 5: Passenger Door Switch

The scan tool data lists contain all the instrument panel, gages, and console related parameters that are available on the scan tool. The parameters in the list are arranged in alphabetical order. The data list column indicates the location of the parameter within the scan tool menu selections.

Use the scan tool data lists as directed by a diagnostic table or in order to supplement the diagnostic procedures. Begin all of the diagnostic procedures with Diagnostic System Check - Vehicle .

Use the scan tool data lists only after the following is determined:

    • There is no published DTC procedure nor published symptom procedure for the customer concern.
    • The DTC or symptom procedure indicated by the diagnostic system check does not resolve the customer concern.

The typical data values are obtained from a properly operating vehicle under the conditions specified in the first row of the scan tool data list table. Comparison of the parameter values from the suspect vehicle with the typical data values may reveal the source of the customer concern.

Body Control Module (BCM)

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Operating Conditions: Ignition ON/Engine OFF/High Beams OFF/Doors Closed/Trunk Closed/Park Brake Unapplied/Seatbelt Buckled

Accy/RAP Relay Command

Power Mode

On/Off

Off

Battery Voltage

Charging Info

Volts

0-18 V

Hazard Lamp Switch

Exterior Lighting

Active/Inactive

Inactive

Headlamp Switch

Exterior Lighting

Active/Inactive

Inactive

High Beam Relay Command

Exterior Lighting

On/Off

Off

High Beam Select Switch

Exterior Lighting

Active/Inactive

Inactive

Ign. Off/Run/Crank

Power Mode

Key Out/ACC/Key In/Off/Crank/Run

Key In/Off

Key In Ignition Status

Power Mode

Key In/Key Out

Key In

Left Rear Door Ajar Sw.

Doors

Door Closed/Door Ajar

Door Closed

Low Beam Relay Command

Exterior Lighting

On/Off

Off

Park Brake Switch

Inputs

Applied/Released

Released

Park Lamp Relay Cmd.

Exterior Lighting

On/Off

Off

Parklamp Switch

Exterior Lighting

Active/Inactive

Inactive

Rear Closure Ajar Switch

Body Rear End

Active/Inactive

Inactive

Right Rear Door Ajar Sw.

Doors

Door Closed/Door Ajar

Door Closed

Driver Door Switch

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Operating Conditions: Ignition ON/Engine OFF/High Beams OFF/Doors Closed/Trunk Closed/Park Brake Unapplied/Seat Belt Buckled

Driver Door Ajar Sw.

Inputs

Active/Inactive

Inactive

Engine Control Module (ECM)

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Operating Conditions: Engine Idling/Normal Operating Temperature

ECT Sensor

Engine Data

Engine Data 1

CMP Actuator Data

Cyl. Deactivation Data

EGR Data

EVAP Data

Fuel System Data

Fuel Trim Data

HO2S Data

Ignition Data

Induction Data

Misfire Data

TAC Data

Cooling/HVAC Data

Cruise/PTO/Traction Data

Cruise Control Data

Electrical/Theft Data

Eng. Position Data

Eng. Speed Cont. Data

Exh. Aftertreatment Data

IPC Data

Auto. Transmission Data

I/M Data

Celsius (Fahrenheit)

85-105°C (185-220°F) (Varies)

Engine Oil Level Switch

Engine Data

CMP Actuator Data

Cyl. Deactivation Data

Cruise/PTO/Traction Data

Cruise Control Data

OK/Low

OK

Engine Oil Life Remaining

CMP Actuator Data

Cyl. Deactivation Data

Percent

0-100%

(Varies)

Engine Oil Pressure Sensor

Engine Data

Engine Data 1

CMP Actuator Data

Cyl. Deactivation Data

Misfire Data

Electrical/Theft Data

IPC Data

kPa (psi)

41 kPa (6 psi)

Engine Oil Pressure Sensor

IPC Data

Volts

0-5 V (Varies)

Engine Oil Pressure Switch

Engine Data

OK/Low

OK

Engine Speed

Engine Data

Engine Data 1

CMP Actuator Data

Cyl. Deactivation Data

EGR Data

EVAP Data

Fuel System Data

HO2S Data

Ignition Data

Induction Data

Misfire Data

TAC Data

Cooling/HVAC Data

Cruise/PTO/Traction Data

Cruise Control Data

Electrical/Theft Data

IPC Data

Auto. Transmission Data

RPM

±100 RPM from Desired Idle Speed

Fuel Level Sensor

EVAP Data

Fuel System Data

IPC Data

Volts

0-5 V (Varies)

Fuel Level Sensor Rear Tank

Fuel System Data

IPC Data

Volts

0-5 V (Varies)

Fuel Tank Level Remaining

EVAP Data

Gallons (Liters)

Varies

Fuel Tank Level Remaining

Engine Data

Engine Data 1

Cyl. Deactivation Data

EVAP Data

Fuel System Data

Misfire Data

Exh. Aftermarket Data

IPC Data

I/M Data

Percent

0-100% (Varies)

Fuel Tank Rated Capacity

EVAP Data

Gallons (Liters)

Varies

Ignition Accessory Signal

IPC Data

On/Off

On

Ignition 1 Signal

Engine Data

Engine Data 1

CMP Actuator Data

Cyl. Deactivation Data

EGR Data

EVAP Data

Fuel System Data

HO2S Data

Ignition Data

Induction Data

Misfire Data

TAC Data

Cooling/HVAC Data

Cruise/PTO/Traction Data

Cruise Control Data

Electrical/Theft Data

Eng. Position Data

Eng. Speed Cont. Data

Exh. Aftertreatment Data

IPC Data

Auto. Transmission Data

I/M Data

Volts

9-16 V (Varies)

MIL (Malfunction Indicator Lamp) Command

Engine Data

I/M Data

On/Off

Off

MIL Requested By DTC

Engine Data

Cyl. Deactivation Data

EVAP Data

HO2S Data

Ignition Data

Induction Data

Misfire Data

TAC Data

Electrical/Theft Data

Auto. Transmission Data

I/M Data

Yes/No

No

MIL Circuit Status

Engine Data

Short Gnd/Open/Short to B+/OK/Incomplete

OK

Reduced Engine Power

Cyl. Deactivation Data

EVAP Data

Fuel System Data

TAC Data

Electrical/Theft Data

Eng. Speed Cont. Data

Auto. Transmission Data

Active/Inactive

Inactive

Start Up ECT

EVAP Data

Fuel Trim Data

HO2S Data

Cooling/HVAC Data

Celsius (Fahrenheit)

85-105°C (185-220°F) (Varies)

TR Sw.

Auto. Transmission Data

Park/Reverse/Neutral/Drive 5/Drive 4/Drive 3/Drive 2/Drive 1

Park

Trans. Fluid Temp

IPC Data

Auto. Transmission Data

Celsius (Fahrenheit)

85-105°C (185-220°F) (Varies)

Vehicle Speed Circuit 2 Status

Cruise Control Data

Short Gnd/Open/Short to B+/OK/Incomplete

OK

Vehicle Speed Sensor

Engine Data

Engine Data 1

CMP Actuator Data

Cyl. Deactivation Data

EGR Data

EVAP Data

Fuel System Data

HO2S Data

Ignition Data

Induction Data

Misfire Data

TAC Data

Cooling/HVAC Data

Cruise/PTO/Traction Data

Electrical/Theft Data

Eng. Position Data

Eng. Speed Cont. Data

Exh. Aftertreatment Data

IPC Data

Auto. Transmission Data

I/M Data

Miles per hour (Kilometers per hour)

0 km/h (0 mph)

Water In Fuel Sensor

Fuel System Data

Water/No Water

No Water

Instrument Panel Cluster (IPC)

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Operating Conditions: Ignition ON/Engine OFF/Seat Belt Buckled/High Beams OFF/Park Brake Unapplied/Park Lamps ON

Battery Voltage

Data Display

Volts

9-16 V (Varies)

Brake Fluid

Data Display

OK/Low

OK

Brake Fluid Switch

Data Display

Volts

Varies

DIC Fuel Info

Data Display

Active/Inactive

Inactive

DIC Information Switch

Data Display

Active/Inactive

Inactive

DIC Personalization

Data Display

Active/Inactive

Inactive

Ignition 1 Input

Data Display

Active/Inactive

Active

Ignition Cycle Counter

Data Display

Cycles

0-255

Odo/Trip Reset Switch

Data Display

Active/Inactive

Inactive

Passenger Seatbelt Indicator Commanded

Data Display

On/Off

Off

Passenger Seatbelt Indicator Status

Data Display

On/Off

Off

Set/Reset Switch

Data Display

Active/Inactive

Inactive

Washer Fluid Level

Data Display

OK/Low

OK

Passenger Door Switch

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Operating Conditions: Ignition ON/Engine OFF/High Beams OFF/Doors Closed/Trunk Closed/Park Brake Unapplied/Seatbelt Buckled

Passenger Door Ajar Sw.

Inputs

Active/Inactive

Inactive