GM Service Manual Online
For 1990-2009 cars only
Table 1: Chime Module
Table 2: Engine Control Module (ECM)/Powertrain Control Module (PCM)
Table 3: Instrument Panel Cluster (IPC)
Table 4: 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 in Vehicle DTC Information.

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.

Chime 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

Ign. Since Current DTC

Data

Cycles

varies

Engine Control Module (ECM)/Powertrain Control Module (PCM)

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Operating Conditions: Engine Idling/Normal Operating Temperature

Battery Voltage

Engine Data 1

Voltage

varies

Check Trans. Lamp

Engine Data 1

On/Off

Off

Coolant Level Switch

Engine Data 1

Engine Data 2

Ok/Low

Ok

ECT Sensor

Engine Data 1

Engine Data 2

EGR Data

Fuel Data

Fuel Trim Data

HO2S Data

Misfire Data

TC 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

Fuel Data

Volts

varies

Engine Oil Pressure Sensor

Fuel Data

kPa (psi)

varies

Engine Speed

Engine Data 1

Engine Data 2

Cruise Control Data

EGR Data

Fuel Data

Fuel Trim Data

HO2S Data

Misfire Data

TAC Data

RPM

±100 RPM from Desired Idle Speed

Fuel Level Sensor

Fuel Data

Percent

0-100%

Fuel Level Sensor

Engine Data 1

Fuel Data

Volts

0-5 Volts

Fuel Level Sensor Rear Tank

Engine Data 1

Fuel Data

Volts

0-5 Volts

Fuel Tank Rated Capacity

Fuel Data

Gallons (Liters)

varies with fuel tank size

Glow Plug Relay

Engine Data 1

On/Off

Off

Ignition 1 Signal

Engine Data 1

Engine Data 2

Cruise Control Data

EGR Data

Fuel Trim Data

TAC Data

Volts

9-16V

varies

Low Coolant Level

Engine Data 1

Yes/No

No

Low Oil Lamp Command

Engine Data 2

On/Off

Off

MIL Command

Engine Data 1

Engine Data 2

On/Off

Off

Reduced Engine Power

Engine Data 1

Cruise Control Data

TAC Data

Active/Inactive

Inactive

Vehicle Speed Sensor

Engine Data 1

EGR Data

Fuel Data

Fuel Trim Data

HO2S Data

Misfire Data

TAC Data

kilometers per hour (miles per hour)

0 km/h (0 mph)

Wait to Start

Engine Data 1

On/Off

Off

Water in Fuel

Engine Data 1

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

8 Digit GM Part Number

Module Information 1

--

varies

ABS Lamp

Outputs

On/Off

Off

Air Bag Lamp

Outputs

On/Off

Off

Battery

Outputs

On/Off

Off

Battery Voltage

Data

Voltage

varies

Brake Lamp

Outputs

On/Off

Off

Change Engine Oil

Outputs

On/Off

Off

Check Eng Oil Level

Outputs

On/Off

Off

Check Gages Lamp

Outputs

On/Off

Off

Crank Voltage

Data

Voltage

varies

Displayed Battery Voltage

Data

Voltage

varies

Displayed Coolant Temp.

Data

Celsius (Fahrenheit)

varies

Displayed Oil Pressure

Data

kPa/psi

varies

Displayed Fuel Level

Data

Percent

varies

Displayed Odometer

Data

Kilometer (Miles)

varies with mileage of vehicle

Displayed Trip Odometer

Data

Kilometer (Miles)

varies with mileage of vehicle

Engine Shutdown Indicator

Outputs

On/Off

Off

Engine Speed

Data

RPM

0 RPM

Fasten Seat Belts

Outputs

On/Off

Off

Ignition 0

Data

Volts

0 - 19  Volts

Ignition 1

Data

Volts

0 - 19  Volts

Ign. Since Current DTC

Data

Cycles

varies

Low Coolant

Outputs

On/Off

Off

Monitored Coolant Temp.

Data

Celsius (Fahrenheit)

varies

Monitored Fuel Level

Data

Percent

varies

Monitored Oil Pressure

Data

kPa (psi)

varies

Overspeed Lamp

Outputs

On/Off

Off

PRNDL State

Inputs

Park / Reverse / Neutral / Overdrive / Drive / 1st / 2nd / Invalid

Park

Reduced Engine Power

Outputs

On/Off

Off

Trip Reset Switch

Inputs

Active/Inactive

Inactive

Vehicle Speed

Data

miles per hour (kilometers per hour)

0 mph (0 km/h)

Year Module Built

Module Information

--

varies

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

9-16V

varies

Chime Type

Data

Fast / Medium / Medium Slow / Slow / Off

Off