GM Service Manual Online
For 1990-2009 cars only
Table 1: Body Control Module (BCM)
Table 2: Instrument Panel Cluster (IPC)
Table 3: Multifunction Alarm Module
Table 4: Powertrain Control Module (PCM)
Table 5: Radio

The scan tool data lists contain all of 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 in order to complete a diagnostic table or in order to supplement the diagnostic procedures. Begin all of the diagnostic procedures with the Diagnostic System Check - Vehicle .

Use the scan tool data lists only in the following circumstances:

    • There is not any published DTC procedure nor any published symptom procedure for the customer concern.
    • The DTC procedure or the symptom procedure indicated by the diagnostic system check does not resolve the customer concern.

The typical data values are from a vehicle that is operating correctly under the conditions specified in the first row of the scan tool data list table. Comparison of the parameter values from the suspected 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/Seat Belt Buckled/High Beams Off/Park Brake Unapplied

Battery Voltage

Data

Volts

Varies

Cargo Door Ajar Switch

Inputs

Open/Closed

Open

Driver Door Ajar Switch

Inputs

On/Off

Off

Headlamp Switch

Inputs

Active/Inactive

Inactive

Ignition Unlock

Inputs

Active/Inactive

Active

Key in Ignition

Inputs

Yes/No

Yes

Park Brake Switch

Inputs

Set/Released

Released

Parklamp Switch

Inputs

Active/Inactive

Inactive

Rap Relay

Outputs

On/Off

On

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

8-Digit GM Part Number

Module Information 1

Numeric

Varies

ABS Lamp

Input/Output

On/Off

Off

Air Bag Lamp

Input/Output

On/Off

Off

Battery

Input/Output

On/Off

On

Brake Lamp

Input/Output

On/Off

Off

Change Engine Oil

Input/Output

On/Off

Off

Check Gages Lamp

Input/Output

On/Off

Off

Cruise Control

Input/Output

On/Off

Off

Displayed Battery Voltage

Data 1

Volts

Varies

Displayed Coolant Temp.

Data 1

Celsius (Fahrenheit)

Varies

Displayed Fuel Level

Data 1

Percent

Varies

Displayed Odometer

Data 2

Kilometers (Miles)

Varies with mileage of vehicle

Displayed Oil Pressure

Data 1

kPa (psi)

Varies

DRL Lamp

Input/Output

On/Off

Off

Fasten Seat Belts

Input/Output

On/Off

Off

High Beam Lamp

Input/Output

On/Off

Off

HydroMax Flow Switch

Input/Output

Closed/Open

Closed

Ignition 1

Data 1

Volts

0-19 V

Ign. Since Current DTC

Data 1

Cycles

Varies

Julian Date of Build

Module Information 1

Numeric

Varies

Left Turn Input

Input/Output

Open/Closed

Open

Low Fuel Lamp

Input/Output

On/Off

Off

Monitored Battery Voltage

Data 1

Volts

Varies

Monitored Coolant Temp.

Data 1

Celsius (Fahrenheit)

Varies

Monitored Fuel Level

Data 1

Percent

Varies

Monitored Oil Pressure

Data 1

kPa (psi)

Varies

Monitored Vehicle Speed

Data 1

km/h (mph)

0 km/h (0 mph)

PRNDL State

Input/Output

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

Park

Right Turn Input

Input/Output

Open/Closed

Open

Security Lamp

Input/Output

On/Off

Off

Tow/Haul

Input/Output

On/Off

Off

Trip Odometer A

Data 2

Kilometers (Miles)

Varies

Trip Odometer B

Data 2

Kilometers (Miles)

Varies

Trip Reset Switch

Input/Output

Active/Inactive

Inactive

Year Module Built

Module Information 1

Numeric

Varies

Multifunction Alarm Module

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

Chime

Data

On/Off

Off

Chime Duration

Data

Cycles

Varies

Chime Frequency

Data

Hz

Varies

Chime Type

Data

Fast/Medium/Medium Slow/Slow

Varies

Ign. Since Current DTC

Data

Cycles

Varies

Indicator Type

Data

--

Varies

Powertrain Control Module (PCM)

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Operating Conditions: Engine Idling/Normal Operating Temperature

Coolant Level Switch

Engine Data 2

Ok/Low

Ok

Cruise Control Active

Engine Data 1

On/Off

Off

DTC Set This Ignition

Engine Data 1

Engine Data 2

Fuel Trim Data

Enhanced EVAP Data

H02S Data

Numeric

Varies

ECT Sensor

Engine Data 1

Engine Data 2

Fuel Trim Data

Misfire Data

Enhanced EVAP Data

H02S Data

Celsius (Fahrenheit)

85-105°C (185-220°F)

Engine Oil Level Switch

Engine Data 1

Engine Data 2

Ok/Low

Ok

Engine Oil Life Remaining

Engine Data 1

Engine Data 2

Percent

0-100%

Engine Oil Pressure Sensor

Engine Data 2

Volts

0-5 V

Engine Oil Pressure Sensor

Fuel Data

kPa (psi)

0 kPa (0 psi)

Engine Speed

Engine Data 1

Engine Data 2

Fuel Trim Data

Misfire Data

Enhanced EVAP Data

H02S Data

RPM

±100 RPM from Desired Idle Speed

Fuel Level Sensor

Engine Data 1

Enhanced EVAP Data

Fuel Data

Volts

0-5 V

Fuel Level Sensor

Fuel Data

Percent

0-100%

Fuel Level Sensor Rear

Engine Data 1

Enhanced Evap Data

Fuel Data

Volts

0-5 V

Fuel Tank Level Remaining

Enhanced EVAP Data

Gallons (Liters)

Varies

Fuel Tank Level Remaining

Enhanced EVAP Data

Percent

0-100%

Fuel Tank Rated Capacity

Enhanced EVAP Data

Gallons (Liters)

Varies

Ignition 1 Signal

Engine Data 1

Engine Data 2

Fuel Trim Data

Enhanced EVAP Data

Volts

9-16 V

Varies

Low Oil Lamp Command

Engine Data 2

On/Off

Off

MIL Command

Engine Data 2

On/Off

Off

TR Sw.

Engine Data 2

Fuel Trim Data

On/Off

Off

Vehicle Speed Sensor

Engine Data 1

Engine Data 2

Fuel Trim Data

Misfire Data

Enhanced EVAP Data

H02S Data

km/h (mph)

0 km/h (0 mph)

Water In Fuel Sensor

Engine Data 1

Water/No Water

No Water

Radio

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

Battery Voltage

Data

Volts

9-16 V

Varies

Chime Type

Outputs

Fast/Medium/Medium Slow/Slow/Off

Varies

Ign. Since Current DTC

Data

Cycles

Varies