GM Service Manual Online
For 1990-2009 cars only
Table 1: IPC
Table 2: Engine Control Module (ECM)

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 the 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.

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

Battery Voltage

IPC

Volts

Varies

Brake Fluid

IPC

OK/Low

OK

Brake Fluid Switch

IPC

Volts

0-5.0 V

Varies/w brake fluid level

DIC Fuel Info

IPC

Active/Inactive

Inactive

DIC Information Switch

IPC

Active/Inactive

Inactive

DIC Personalization

IPC

Active/Inactive

Inactive

Engine Speed Signal

IPC

RPM

±100 RPM from Desired Idle Speed

Heated Washer Fluid Indicator Signal

IPC

Active/Inactive

Inactive

Ignition 1 Input

IPC

Active/Inactive

Active

Ignition Cycle Counter

IPC

Counts

Varies

Information Down Switch

IPC

Active/Inactive

Inactive

Information Up Switch

IPC

Active/Inactive

Inactive

Passenger Seatbelt Indicator Command

IPC

Off/On

Off

Passenger Seatbelt Indicator Status

IPC

Off/On

Off

PRNDL State

IPC

First Gear/Second Gear/Third Gear/Reverse/Neutral/Park/Drive/

Park

Trip Reset Switch

IPC

Active/Inactive

Inactive

Vehicle Speed

IPC

km/h/mph

Varies w/vehicle speed

Washer Fluid Level

IPC

OK/Low

OK

Engine Control Module (ECM)

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Operating Conditions: Engine Idling/Normal Operating Temperature

Change Engine Oil Indicator Command

ECM IPC Data

Off/On

Off

Cruise Control Active

ECM IPC Data

Yes/No

No

ECT Sensor

ECM IPC Data

Celsius (Fahrenheit)

85-105°C (185-220°F)

Engine Oil Level Switch

ECM IPC Data

Ok/Low

Ok

Engine Oil Life Remaining

ECM IPC Data

100-0%

Varies w/engine oil life

Engine Oil Pressure Switch

ECM IPC Data

Low/Ok

Ok

Engine Oil Temperature Calculated

ECM IPC Data

Celsius (Fahrenheit)

Varies w/oil temperature

Engine Speed

ECM IPC Data

RPM

±100 RPM from Desired Idle Speed

Fuel Level Sensor

ECM IPC Data

Volts

Varies

Fuel Tank Level Remaining

ECM IPC Data

%

0-100%

Varies

Ignition 1 Signal

ECM IPC Data

Volts

Varies

Ignition Accessory Signal

ECM IPC Data

Off/On

On

Low EOP Indicator Command

IPC Data

Off/On

Off

Low Engine Oil Level Indicator Command

ECM IPC Data

Off/On

Off

MIL Circuit Status

ECM IPC Data

Incomplete/Short GND/Open/Short B+/Ok

OK

MIL Command

ECM IPC Data

Off/On

Off

Vehicle Speed Sensor

ECM IPC Data

km/h (mph)

0 km/h (0 mph)