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

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/Headlamps Off/Doors Closed/Park Brake Unapplied

Headlamp Switch

Inputs

Active/Inactive

Inactive

Hood Ajar Switch

Inputs

Active/Inactive

Inactive

Ignition 0

Inputs

On/Off

On

Ignition 1

Inputs

On/Off

On

Ignition 3

Inputs

On/Off

On

Key In Ignition

Inputs

Yes/No

Yes

Left Rear Door Ajar Sw

Inputs

On/Off

Off

Park Brake Switch

Inputs

Set/Released

Released

Parklamp Switch

Inputs

Active/Inactive

Inactive

Right Rear Door Ajar Sw

Inputs

On/Off

Off

Driver Door Module (DDM)/Passenger Door Module (PDM)

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Operating Conditions: Ignition ON/Engine OFF/Vehicle in PARK/All doors closed

Battery 1 Low Current

Data

Voltage

12.8 V

Battery 2 High Current

Data

Voltage

12.8 V

Door Ajar Switch

Inputs

On/Off

Off

Engine Control Module (ECM)/Powertrain Control Module (PCM)

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Operating Conditions: Engine Idling/Normal Operating Temperature

4WD Low Signal (If Equipped)

IPC Data

Enabled/Disabled

Disabled

Change Engine Oil Indicator

IPC Data

On/Off

Off

ECT Sensor

Air Data

Automatic Trans.

Cooling/HVAC Data

Cyl. Deactivation Data

Engine Data

Engine Data 1

Engine Data 2

Engine Data 3

EVAP Data

Fuel Trim Data

HO2S Data

Ignition Data

IPC Data

Misfire Data

TAC Data

Celsius (Fahrenheit)

85-105°C (185-220°F)

Engine Oil Level Switch

Cyl. Deactivation Data

Engine Data 3

OK/Low

OK

Engine Oil Life Remaining

Cyl. Deactivation Data

Percent

0-100%

(varies)

Engine Oil Pressure Sensor

IPC Data

Volts

0-5 Volts (Varies)

Engine Oil Pressure Sensor

Cyl. Deactivation Data

Engine Data

IPC Data

Misfire Data

kPA (PSI)

0 kPA (0 PSI)

Engine Oil Pressure Switch

Cyl. Deactivation Data

Engine Data 3

OK/Low

OK

Engine Speed

Air Data

Automatic Trans.

Cooling/HVAC Data

Cruise Control Data

Cyl. Deactivation Data

Electrical/Theft Data

Engine Data

Engine Data 1

Engine Data 2

Engine Data 3

EVAP Data

Fuel Trim Data

HO2S Data

Ignition Data

IPC Data

Misfire Data

TAC Data

RPM

±100 RPM from desired idle speed

Fuel Level Sensor

Engine Data 1

EVAP Data

Percent

0-100%

(Varies)

Fuel Level Sensor

EVAP Data

IPC Data

Voltage

0-5 Volts (Varies)

Fuel Tank Level Remaining

Engine Data

EVAP Data

IPC Data

Misfire Data

Percent

0-100% (Varies)

Fuel Tank Rated Capacity

EVAP Data

Gallons (Liters)

Varies

Ignition 1 Signal

Air Data

Automatic Trans.

Cooling/HVAC Data

Cruise Control Data

Cyl. Deactivation Data

Electrical/Theft Data

Engine Data

Engine Data 1

Engine Data 2

Engine Data 3

EVAP Data

Fuel Trim Data

HO2S Data

Ignition Data

IPC Data

Misfire Data

Output Driver Data

TAC Data

Voltage

12.2 V

(Varies)

MIL (Malfunction Indicator Lamp) Command

Automatic Trans.

Engine Data

Engine Data 1

EVAP Data

Ignition Data

IPC Data

On/Off

Off

Odometer

IPC Data

km (miles)

Varies

Reduced Engine Power

Cruise Control Data

Cyl. Deactivation Data

Engine Data 1

Engine Data 3

TAC Data

Active/Inactive

Inactive

Vehicle Speed Sensor

Air Data

Automatic Trans.

Cooling/HVAC Data

Cruise Control Data

Cyl. Deactivation Data

Engine Data

Engine Data 1

Engine Data 2

Engine Data 3

EVAP Data

Fuel Trim Data

HO2S Data

Ignition Data

IPC Data

Misfire Data

TAC 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

ABS Lamp

Inputs/Outputs

On/Off

Off

Air Bag Lamp

Inputs/Outputs

On/Off

Off

Battery

Inputs/Outputs

On/Off

On

Battery Voltage

Data 1

Voltage

12.2 V

(Varies)

Brake Lamp

Inputs/Outputs

On/Off

Off

Check Gages Lamp

Inputs/Outputs

On/Off

Off

Cruise Control

Inputs/Outputs

On/Off

Off

DIC Fuel Info

Inputs/Outputs

On/Off

Off

DIC Personalization

Inputs/Outputs

On/Off

Off

DIC Select

Inputs/Outputs

On/Off

Off

DIC Trip Info

Inputs/Outputs

On/Off

Off

Displayed Coolant Temperature

Data 1

Celsius (Fahrenheit)

Varies

Displayed Fuel Level

Data 1

%

Varies

Displayed Odometer

Data 2

km (miles)

Varies

Displayed Oil Pressure

Data 1

kPA (PSI)

0 kPA (0 PSI)

Engine Speed

Data 1

RPM

0 RPM

Fasten Seat Belts

Inputs/Outputs

On/Off

Off

High Beam Lamp

Inputs/Outputs

On/Off

Off

Ignition 1

Data 1

Voltage

12.2 V

(Varies)

Ignition Since Current DTC

Data 1

cycles

Varies

Left Turn Input

Inputs/Outputs

Open/Closed

Open

Low Fuel Lamp

Inputs/Outputs

On/Off

Off

Low Washer Fluid

Inputs/Outputs

OK/Low

OK

Monitored Coolant Temperature

Data 1

Celsius (Fahrenheit)

Varies

Monitored Fuel Level

Data 1

%

Varies

Monitored Oil Pressure

Data 1

kPA (PSI)

0 kPA (0 PSI)

PRND321 State

Inputs/Outputs

Park, Reverse, Neutral, Drive, 3rd, 2nd, 1st

Park

Rear Gate/Door

Inputs/Outputs

Open/Closed

Closed

Right Turn Input

Inputs/Outputs

Open/Closed

Open

Security Lamp

Inputs/Outputs

On/Off

Off

Service 4WD

Inputs/Outputs

On/Off

Off

Trip Odometer A

Data 2

kilometers (miles)

Varies

Trip Odometer B

Data 2

kilometers (miles)

Varies

Trip Reset Switch

Inputs/Outputs

Active/Inactive

Inactive

Upshift Lamp

Inputs/Outputs

On/Off

Off

Vehicle Speed

Data 1

kilometers per hour (miles per hour)

0 mph (0 km/h)

Lift Gate Module

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Operating Conditions: Ignition ON/Engine OFF/Vehicle in PARK/All doors closed

Battery Voltage

Data

Voltage

12.8 V

Liftgate Ajar Switch

Data

Closed/Ajar

Closed

Liftglass Ajar Switch

Data

Closed/Ajar

Closed