GM Service Manual Online
For 1990-2009 cars only
Table 1: Instrument Panel Cluster (IPC) Scan Tool Data List
Table 2: Engine Control Module (ECM) Scan Tool Data List

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 order, as they appear on the scan tool. 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.

Instrument Panel Cluster (IPC) Scan Tool Data List

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Operating Conditions: Ignition ON/Engine OFF, Doors Closed, Lights Off, Hatch Closed, Park Brake Not Set, No Trailer Tow Attached

Accessory Switch

BCM/Inputs

Active/Inactive

Inactive

Battery Voltage

IPC

Volts

9-16 Volts

Brake Fluid Level Switch

IPC

On/Off

Off

Change Engine Oil Indicator Command

ECM

On/Off

Off

Cruise Control Active

ECM

Yes/No

No

ECT Sensor

ECM

Celsius (Fahrenheit)

85-105°C (185-220°F) (Varies)

Engine Oil Life Remaining

ECM

%

0-100% (Varies)

Engine Oil Level Switch

ECM

OK/Low

OK

Engine Oil Pressure Sensor

ECM

kPa (psi)

Varies

Engine Oil Pressure Sensor

ECM

Volts

0-5 V

Engine Oil Temperature Calculated

ECM

Celsius (Fahrenheit)

Varies

Engine Speed

ECM

RPM

±100 RPM from Desired Idle Speed

Fuel Level Sensor

ECM

Volts

0-5 V

Fuel Tank Level Remaining

ECM

%

0-100% (Varies)

Headlamp Off Switch

BCM/Inputs

Active/Inactive

Inactive

High Beam Switch

BCM/Inputs

On/Off

Off

Ignition 1 Signal

ECM

Volts

9-16 Volts

Ignition Accessory Signal

ECM

On/Off

On

Information Down Switch

IPC

Active/Inactive

Inactive

Information Up Switch

IPC

Active/Inactive

Inactive

Interior Light Switch

BCM/Inputs

On/Off

Off

Key In Ignition

BCM/Inputs

Active/Inactive

Active

Left Rear Door Ajar Sw.

BCM/Inputs

Closed/Ajar

Closed

Left Turn Signal

BCM/Inputs

On/Off

Off

LF Door Ajar Switch

BCM/Inputs

Door Closed/Ajar

Door Closed

Low Beam Switch

BCM/Inputs

On/Off

Off

Low Engine Oil Level Indicator Command

ECM

On/Off

Off

Low EOP Indicator Command

ECM

On/Off

Off

MIL Circuit History

ECM

Ok/Open/Short/Invalid State

OK

MIL Command

ECM

On/Off

Off

Outside Air Temp

IPC

Counts

Varies

Outside Air Temp. Raw

IPC

Celsius (Fahrenheit)

Varies

Outside Air Temp. Filtered

IPC

Celsius (Fahrenheit)

Varies

Page Switch

IPC

Active/Inactive

Inactive

Park Brake Switch

BCM/Inputs

Set/Released

Released

Park Lamp Switch

BCM/Inputs

On/Off

Off

RF Door Ajar Switch

BCM/Inputs

Door Closed/Ajar

Door Closed

Right Rear Door Ajar Sw.

BCM/Inputs

Closed/Ajar

Closed

Right Turn Signal

BCM/Inputs

On/Off

Off

Set/Reset Switch

IPC

Active/Inactive

Inactive

Vehicle Speed Circuit Status

ECM

OK/Incomplete/Short Gnd/Open/Short to B+

OK

Vehicle Speed Sensor

ECM

km/h

0 km/h

Engine Control Module (ECM) Scan Tool Data List

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Operating Conditions: Ignition ON/Engine OFF

Ambient Temperature Sensor

Engine Data

EVAP Data

Celsius (Fahrenheit)

-35-60°C (-31-140°F) (Varies)

ECT Sensor

CMP Data

Engine Data

EVAP Data

Fuel Trim Data

HO2S Data

Ignition Data

Induction Data

Misfire Data

TAC Data

Celsius (Fahrenheit)

85-105°C (185-220°F) (Varies)

Engine Oil Level Switch

CMP Data

Engine Data

OK/Low

OK

Engine Oil Life Remaining

CMP Data

%

0-100% (Varies)

Engine Oil Pressure Sensor

CMP Data

Engine Data

Misfire Data

kPa (psi)

Varies

Engine Oil Pressure Switch

Engine Data

OK/Low

OK

Engine Speed

CMP Data

Engine Data

EVAP Data

Fuel Trim Data

HO2S Data

Ignition Data

Induction Data

TAC Data

Misfire Data

RPM

±100 RPM from Desired Idle Speed

Fuel Level Sensor

EVAP Data

Volts

0-5 V

Fuel Pump Relay Command

Engine Data

On/Off

Off

Fuel Tank Level Remaining

Engine Data

EVAP Data

Fuel Trim Data

Misfire Data

%

0-100% (Varies)

Fuel Tank Rated Capacity

EVAP Data

Liters

Varies

Ignition 1 Signal

CMP Data

Engine Data

EVAP Data

Fuel Trim Data

HO2S Data

Ignition Data

Induction Data

Misfire Data

Volts

9-16 Volts

MIL Circuit Status

Engine Data

OK/Fault/Invalid State

OK

MIL Command

Engine Data

On/Off

Off

Reduced Engine Power

TAC Data

Active/Inactive

Inactive

Vehicle Speed Sensor

CMP Data

Engine Data

EVAP Data

Fuel Trim Data

HO2S Data

Ignition Data

Induction Data

Misfire Data

TAC Data

km/h (mph)

0 km/h (mph)