GM Service Manual Online
For 1990-2009 cars only
Table 1: Driver Door Module (DDM)
Table 2: Head Up Display (HUD)
Table 3: Instrument Panel Cluster (IPC)
Table 4: Instrument Panel Module (IPM)
Table 5: Powertrain Control Module (PCM)

The scan tool data lists contain all the instrument panel, gauges, 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 in Vehicle DTC Information.

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.

Driver Door Module (DDM)

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Operating Conditions: Ignition ON/Engine OFF/Doors Closed

Driver Door Ajar Sw.

Inputs

On/Off

Off

Driver Door Jamb Sw.

Inputs

On/Off

Off

Left Rear Door Ajar Sw.

Inputs

On/Off

Off

Left Rear Door Jamb Sw.

Inputs

On/Off

Off

Passenger Door Ajar Sw.

Inputs

On/Off

Off

Passenger Door Jamb Sw.

Inputs

On/Off

Off

Right Rear Door Ajar Sw.

Inputs

On/Off

Off

Right Rear Door Jamb Sw.

Inputs

On/Off

Off

Head Up Display (HUD)

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

Check Gages Lamp

Inputs

On/Off

Off

English/Metric Status

Inputs

English/ Metric

English

High Beam Switch

Inputs

On/Off

Off

Ignition 3

Inputs

On/Off

On

Ignition Counter

Data

--

Varies

Ignition Voltage

Data

Volts

12.2 V

Varies

Lt. Turning Signal Sw.

Inputs

On/Off

Off

Outside Status

Inputs

Day/Night

Varies

PROM ID

Module Information 1

--

Varies

Rt. Turning Signal Sw.

Inputs

On/Off

Off

Vehicle Speed

Inputs

km/h (mph)

0 (mph) 0 km/h

VF Dim

Data

Volts

Varies

Year Module Built

Module Information 1

--

Varies

8 Digit GM Part Number

Module Information 2

--

Varies

Instrument Panel Cluster (IPC)

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Operating Conditions: Ignition ON/Engine OFF/Seat Belt Unbuckled/High Beams Off/Park Brake Unapplied

Air Bag Lamp

Outputs

On/Off

Off

Antilock Discrete

Inputs - Base IPC

Inputs - Uplevel IPC

On/Off

Off

Antilock Lamp

Outputs

On/Off

Off

Battery Voltage

Data

Volts

12.2 V (varies)

Brake Lamp

Outputs

On/Off

Off

Cruise Lamp

Outputs

On/Off

Off

Display Fuel Switch

Inputs - Uplevel IPC

On/Off

Off

Display Gauge Switch

Inputs - Uplevel IPC

On/Off

Off

English/Metric Sw

Inputs - Base IPC

Inputs - Uplevel IPC

Active/Inactive

Inactive

Engine Speed

Data

RPM

0 RPM

Fasten Seat Belts

Outputs

On/Off

Off

High Beam Lamp

Outputs

On/Off

Off

Hot Temp. Lamp

Outputs

On/Off

Off

Ignition 1

Inputs - Base IPC

Inputs - Uplevel IPC

On/Off

On

Ignition Counter

Data

--

Varies

km/h (MPH Export) Lamp

Outputs

On/Off

Off

Low Brake Fluid

Inputs - Base IPC

Inputs - Uplevel IPC

On/Off

Off

Low Coolant Level

Inputs - Uplevel IPC

On/Off

Off

Low Fuel Lamp

Outputs

On/Off

Off

Lt. Turning Signal Sw.

Inputs - Base IPC

Inputs - Uplevel IPC

On/Off

Off

mph (km/h Export) Lamp

Outputs

On/Off

On

Odo/Trip Switch

Inputs - Uplevel IPC

On/Off

Off

Oil Pressure Lamp

Outputs

On/Off

Off

Park Brake Switch

Inputs - Base IPC

Inputs - Uplevel IPC

On/Off

Off

PROM ID

Module Information

--

Varies

Reset Switch

Inputs - Uplevel IPC

On/Off

Off

Rt. Turning Signal Sw.

Inputs - Base IPC

Inputs - Uplevel IPC

On/Off

Off

Serial Number

Module Information

--

Varies

Service Veh. Soon Lamp

Outputs

On/Off

Off

Theft System Lamp

Outputs

On/Off

Off

Traction Off Lamp

Outputs

On/Off

Off

Trip Reset Switch

Inputs - Base IPC

On/Off

Off

Vehicle Speed

Data

km/h (mph)

0 km/h (mph)

Volt Lamp

Outputs

On/Off

Off

Washer Fluid Level

Inputs - Uplevel IPC

On/Off

Off

Year Module Built

Module Information

--

Varies

8 Digit GM Part Number

Module Information

--

Varies

Instrument Panel Module (IPM)

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Operating Conditions: Key in Ignition/Ignition On

Key In Ignition

Non - HVAC Data

Yes/No

Yes

Powertrain Control Module (PCM)

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Operating Conditions: Engine Idling/Normal Operating Temperature

ECT Sensor

Engine Data 1

Engine Data 2

EVAP

Celsius (Fahrenheit)

85-105°C (185-220°F)

Engine Oil Level Switch

Engine Data 2

Ok/Low

Ok

Engine Oil Life Remaining

Engine Data 2

Percent

0-100%

(varies)

Engine Oil Pressure Sen

Engine Data 2

Volts

2.20 V

Engine Speed

Engine Data 1

Engine Data 2

EVAP

RPM

±100 RPM from Desired Idle Speed

Fuel Tank Level Remaining

EVAP

Percent

0-100%

(varies)

Vehicle Speed Sensor

Engine Data 1

Engine Data 2

EVAP

Miles per hour (Kilometers per hour)

0 mph (0 km/h)