GM Service Manual Online
For 1990-2009 cars only
Table 1: Engine Control Module (ECM) 4.6L
Table 2: Engine Control Module (ECM) 4.4L
Table 3: Instrument Panel Cluster (IPC)
Table 4: Head Up Display (HUD)

The scan tool data lists contain all the instrument panel, gage, 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.

Engine Control Module (ECM) 4.6L

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Operating Conditions: Engine Idling/Normal Operating Temperature

Commanded Gear

IPC Data

Shift, 1st, 2nd, 3rd, 4th, 5th, Invalid, Invalid, Reverse, Neutral, or Park

Park

Cruise Control Active

IPC Data

No/Yes

No

ECT Sensor

IPC Data

Celsius (Fahrenheit)

85-105°C (185-220°F)

Engine Oil Life Remaining

IPC Data

100-0 Percent (%)

Varies w/oil life

Engine Oil Pressure Sensor

IPC Data

kPa (psi)

Varies w/oil pressure

Engine Oil Pressure Sensor

IPC Data

Volts

Varies w/oil pressure

Engine Oil Temperature Calculated

IPC Data

Celsius (Fahrenheit)

Varies w/oil temperature

Engine Speed

IPC Data

RPM

±100 RPM from Desired Idle Speed

Fuel Level Sensor- Left Tank

IPC Data

Volts

Varies w/fuel level

Fuel Level Sensor- Right Tank

IPC Data

Volts

Varies w/fuel level

Fuel Tank Level Remaining

IPC Data

Liters (Gallons)

Varies w/fuel level

Ignition 1 Signal

IPC Data

Volts

9 - 16 V

MIL Circuit Status

IPC Data

Fault

--

MIL Command

IPC Data

Off/On

Off

Vehicle Speed Sensor

IPC Data

kilometers per hour (miles per hour)

0 km/h (0 mph)

Engine Control Module (ECM) 4.4L

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Operating Conditions: Engine Idling/Normal Operating Temperature

Change Engine Oil Indicator Command

IPC Data

Off/On

Off

Cruise Control Active

IPC Data

No/Yes

No

ECT Sensor

IPC Data

Celsius (Fahrenheit)

85-105°C (185-220°F)

Engine Oil Level Switch

IPC Data

Off/Ok

Off

Engine Oil Life Remaining

IPC Data

100-0 Percent (%)

Varies w/oil life

Engine Oil Pressure Sensor

IPC Data

kPa (psi)

Varies w/oil pressure

Engine Oil Pressure Sensor

IPC Data

Volts

Varies w/oil pressure

Engine Oil Temperature Calculated

IPC Data

Celsius (Fahrenheit)

Varies w/oil temperature

Engine Oil Temperature Sensor

IPC Data

Celsius (Fahrenheit)

Varies w/oil temperature

Engine Speed

IPC Data

RPM

±100 RPM from Desired Idle Speed

Engine Speed Circuit Status

IPC Data

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

Ok

Fuel Level Sensor- Left Tank

IPC Data

Volts

Varies w/fuel level

Fuel Level Sensor- Right Tank

IPC Data

Volts

Varies w/fuel level

Fuel Tank Level Remaining

IPC Data

Liters (Gallons)

Varies w/fuel level

Fuel Tank Level Remaining

Fuel Tank Level Remaining

0-100 Percent (%)

Varies w/fuel level

Ignition 1 Signal

IPC Data

Volts

9 - 16 V

Ignition Accessory Voltage

IPC Data

Off/On

Off

Low EOP Indicator Command

IPC Data

Off/On

Off

Low Engine Oil Level Indicator Command

IPC Data

Off/On

Off

MIL Circuit Status

IPC Data

Fault

--

MIL Command

IPC Data

Off/On

Off

Vehicle Speed Circuit Status

IPC Data

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

Ok

Vehicle Speed Sensor

IPC Data

kilometers per hour (miles per hour)

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/Park Brake Unapplied

Chime

IPC Data

Off/On

Off

Dim Down Switch

IPC Data

Inactive/Active

Inactive

Dim Select Switch

IPC Data

Inactive/Active

Inactive

Dim Up Switch

IPC Data

Inactive/Active

Inactive

Engine Speed Signal

IPC Data

RPM

±100 RPM from Desired Idle Speed

Information Down Switch

IPC Data

Inactive/Active

Inactive

Information Up Switch

IPC Data

Inactive/Active

Inactive

Options Switch

IPC Data

Inactive/Active

Inactive

Odometer

IPC Data

Kilometers (Miles)

Varies (0 - 99,999)

Reset Switch

IPC Data

Inactive/Active

Inactive

Vehicle Speed Signal

IPC Data

kilometers per hour (miles per hour)

0 km/h (0 mph)

Head Up Display (HUD)

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Operating Conditions: Ignition ON/Engine OFF/Park Brake Unapplied

Adjust Display Down Switch

IPC Data

Inactive/Active

Inactive

Adjust Display Up Switch

IPC Data

Inactive/Active

Inactive

Battery Voltage Signal

IPC Data

Volts

9 - 16 V

Dimming Level

IPC Data

0-100 Percent (%)

Varies w/dimming level

English Metric Status

IPC Data

English/Metric

English

Language

IPC Data

English, French, German, Italian, Spanish, or Japanese

Varies w/selection

Page Switch

IPC Data

Inactive/Active

Inactive