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: Instrument Panel Cluster (IPC)
Table 4: Powertrain Control Module (PCM)

The scan tool data lists contain all the instrument panel, gauges, 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 , 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/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

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

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 Voltage

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

Vehicle Speed

Data 1

kilometers per hour (miles per hour)

0 mph (0 km/h)

Powertrain Control Module (PCM)

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Operating Conditions: Engine Idling/Normal Operating Temperature

ECT Sensor

Engine Data 1

Engine Data 2

Engine Data 3

EVAP Data

Fuel Trim Data

Misfire Data

Celsius (Fahrenheit)

85-105°C (185-220°F)

Engine Oil Level Switch

Engine Data 3

OK/Low

OK

Engine Oil Life Remaining

Engine Data 3

Percent

0-100%

(varies)

Engine Oil Pressure Switch

Engine Data 3

OK/Low

OK

Engine Speed

Engine Data 1

Engine Data 2

Engine Data 3

EVAP Data

Fuel Trim Data

Misfire Data

RPM

±100 RPM from desired idle speed

Fuel Level Sensor

Engine Data 1

EVAP Data

Percent

0-100%

(varies)

Ignition 1 Signal

Engine Data 1

Engine Data 2

Engine Data 3

Fuel Trim Data

Voltage

12.2 V

(varies)

Vehicle Speed Sensor

Engine Data 1

Engine Data 2

Engine Data 3

EVAP Data

Fuel Trim Data

Misfire Data

km/h (mph)

0 km/h (0 mph)