GM Service Manual Online
For 1990-2009 cars only
Table 1: Body Control Module (BCM)
Table 2: Instrument Panel Cluster (IPC)
Table 3: Powertrain Control Module (PCM)

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 - Instrument Cluster , Diagnostic System Check - Driver Information Systems , or Diagnostic System Check - Audible Warnings .

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

Battery Voltage

Data

Volts

12.5 V (varies)

Driver Door Jamb Sw

Input 1

Active/Inactive

Inactive

Ignition 1

Input 1

Active/Inactive

Active

Ignition 3

Input 1

Active/Inactive

Active

Key in Ignition

Input 1

Yes/No

Yes

Left Turn Signal

Input 2

On/Off

Off

Park Brake Switch

Input 1

Set/Released

Released

Park Lamps

Input 2

On/Off

Off

Right Turn Signal

Input 2

On/Off

Off

Security Lamp State

Security Data

On/Off/Flashing

Off

Vehicle Speed

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

4WD

Outputs

On/Off

Off

ABS Lamp

Outputs

On/Off

Off

Battery

Outputs

On/Off

On

Battery Voltage

Data

Voltage

Varies

Brake Lamp

Outputs

On/Off

Off

Cargo Lamp On

Outputs

On/Off

Off

Change Engine Oil

Outputs

On/Off

Off

Check Coolant Temp

Outputs

On/Off

Off

Check Engine Oil Level

Outputs

On/Off

Off

Check Engine Temp

Outputs

On/Off

Off

Cruise Control

Outputs

On/Off

Off

Dimming

Inputs

Active/Inactive

Inactive

Displayed Coolant Temp

Data

Celsius (Fahrenheit)

87°C (190°F)

Displayed Fuel Level

Data

Percent

0-100% (Varies)

Displayed Odometer

Data

Kilometers (Miles)

Varies with the mileage of vehicle

Displayed Trip Odometer

Data

Kilometers (Miles)

Varies with the mileage of vehicle

Engine Speed

Data

RPM

0 RPM

Fasten Seat Belts

Outputs

On/Off

Off

High Beam Lamp

Outputs

On/Off

Off

Low Coolant

Outputs

On/Off

Off

Low Fuel Lamp

Outputs

On/Off

Off

Low Washer Fluid

Outputs

On/Off

Off

Module Part Number

Module Information

Numeric

Varies

Monitored Coolant Temp

Data

Celsius (Fahrenheit)

82-93°C (180-200°F)

Monitored Fuel Level

Data

Percent

0-100% (Varies)

Oil Pressure Lamp

Outputs

On/Off

Off

Overspeed Lamp

Outputs

On/Off

Off

Park Switch

Inputs

Open/Closed

Closed

PRNDL State

Inputs

Park/ Reverse/ Neutral/ First/ Second/ Third/ Drive

Park

Reduced Engine Power

Outputs

Active/Inactive

Inactive

Security Lamp

Outputs

On/Off

Off

Service 4WD

Outputs

On/Off

Off

Tow/Haul

Outputs

On/Off

Off

Trans. Fluid Hot

Outputs

On/Off

Off

Trans. Hot...Idle Engine

Outputs

On/Off

Off

Trip Reset Switch

Inputs

Active/Inactive

Inactive

Upshift Lamp

Outputs

On/Off

Off

Vehicle Speed

Data

km/h (mph)

0 km/h (0 mph)

Powertrain Control Module (PCM)

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Operating Conditions: Engine Idling/Normal Operating Temperature

Cruise Control Active

Engine Data 1

Engine Data 2

Engine Data 3

Yes/No

No

ECT Sensor

Engine Data 1

Engine Data 2

Engine Data 3

EGR Data

Enhanced EVAP Data

Fuel Trim Data

H02S Data

Misfire Data

Celsius (Fahrenheit)

85-105°C (185-220°F)

Engine Oil Life Remaining

Engine Data 3

Percent

0-100%

Engine Oil Pressure Sensor

Engine Data 2

Volts

0-5 Volts (Varies)

Engine Speed

Engine Data 1

Engine Data 2

Engine Data 3

Enhanced EVAP Data

Fuel Trim Data

H02S Data

Misfire Data

RPM

±100 RPM from desired idle speed

Fuel Level Sensor

Engine Data 1

EGR Data

Enhanced EVAP Data

Volts

0-5 Volts (Varies)

Fuel Tank Level Remaining

Enhanced EVAP Data

Percent

0-100%

(varies)

Fuel Tank Level Remaining

Enhanced EVAP Data

liters (gallons)

0-70 liters

(varies)

Ignition 1 Signal

Engine Data 1

Engine Data 2

Engine Data 3

Enhanced EVAP Data

Fuel Trim Data

Volts

9-16 V

(varies)

MIL (Malfunction Indicator Lamp) Command

Engine Data 1

On/Off

Off

Vehicle Speed Sensor

Engine Data 1

Engine Data 2

Engine Data 3

Enhanced EVAP Data

Fuel Trim Data

H02S Data

km/h (mph)

0 km/h (0 mph)