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 Switch

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

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

Ambient Temperature Sensor

Engine Data

EVAP Data

Fuel Trim Data

Celsius (Fahrenheit)

-35-60°C (-31-140°F) (Varies)

Cruise Control Active

Engine Data

TAC Data

Cruise/PTO/Traction Data

IPC Data

Yes/No

No

Engine Speed

Engine Data

CMP Actuator Data

EVAP Data

HO2S Data

Ignition Data

Induction Data

Misfire Data

Cooling/HVAC Data

Cruise/PTO/Traction Data

Electrical/Theft Data

IPC Data

Auto. Transmission Data

RPM

100 RPM from Desired Idle Speed

ECT Sensor

Engine Data

CMP Actuator Data

EVAP Data

Fuel Trim Data

HO2S Data

Ignition Data

Induction Data

Misfire Data

TAC Data

Cooling/HVAC Data

Cruise/PTO/Traction Data

Electrical/Theft Data

IPC Data

Auto. Transmission Data

Celsius (Fahrenheit)

85-105°C (185-220°F)

Engine Oil Life Remaining

IPC Data

%

Varies

Engine Oil Pressure Switch

Engine Data

CMP Actuator Data

Misfire Data

Electrical/Theft Data

IPC Data

OK/Low

OK

Fuel Level Sensor

EVAP Data

Fuel Trim Data

IPC Data

Volts

0-5 V (Varies)

Fuel Tank Level Remaining

Engine Data

EVAP Data

Fuel Trim Data

Misfire Data

IPC Data

%

Varies

Fuel Tank Level Remaining

Engine Data

EVAP Data

Fuel Trim Data

Gallons (Liters)

Varies

Fuel Tank Rated Capacity

EVAP Data

Fuel Trim Data

Liters (Gallons)

62.8 L (16.6 gal)

Ignition 1 Signal

Engine Data

CMP Actuator Data

EVAP Data

Fuel Trim Data

HO2S Data

Ignition Data

Induction Data

Misfire Data

TAC Data

Cooling/HVAC Data

Cruise/PTO/Traction Data

Electrical/Theft Data

IPC Data

Auto. Transmission Data

Volts

9-16 V (Varies)

MIL Circuit Status

IPC Data

OK/Open/Short/Invalid State

OK

MIL Command

Engine Data

IPC Data

On/Off

Off

Reduced Engine Power

TAC Data

Active/Inactive

Inactive

Vehicle Speed Sensor

Engine Data

CMP Actuator Data

EVAP Data

Fuel Trim Data

HO2S Data

Ignition Data

Induction Data

Misfire Data

TAC Data

Cooling/HVAC Data

Cruise/PTO/Traction Data

Electrical/Theft Data

IPC Data

Auto. Transmission Data

km/h (mph)

0 km/h (0 mph)

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