GM Service Manual Online
For 1990-2009 cars only

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 correctly 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.

Parameter

Operating Conditions

Expected Value

Definition

Ignition is ON, engine OFF, and vehicle is stationary

ABS Telltail

Systems check or fault with the system

On

This parameter displays On, which will command the telltail lamp on the instrument cluster to illuminate when doing a systems check or a fault is logged.

Systems are normal

Off

Alternator Telltail

Fault with the system

On

This parameter displays On, which will command the telltail lamp on the instrument cluster to illuminate when there is a fault with the system.

Systems are normal

Off

Backup System Power Mode

Back up power system activated

Enabled

This parameter displays the status of the backup system power mode.

Back up power system deactivated

Disabled

Battery Voltage

--

12 Volts

The scan tool displays 0-14 Volts.

The scan tool displays approximately 12 Volts when the ignition is on

Brake Fluid Level Switch

Low brake fluid level

On

This parameter displays On, which will command the telltail lamp on the instrument cluster to illuminate when there is a fault with the system.

Normal brake fluid level

Off

Brake System Telltail

Systems check or fault with the system

On

This parameter displays On, which will command the telltail lamp on the instrument cluster to illuminate when doing a systems check or a fault is logged.

Systems are normal

Off

Current Trip Display

--

Km

This parameter displays the total distance travelled so far.

Distance To Arrival

--

Km

This parameter displays the remaining distance till arrival, based off the user's selection.

Door Open Telltail

Door open or ajar

On

This parameter displays On, which will command the telltail lamp on the instrument cluster to illuminate when a door is open or not closed correctly.

Door closed correctly

Off

Drivers Side Seat Belt Telltail

Seat belt not being worn

On

This parameter displays On, which will command the telltail lamp on the instrument cluster to illuminate when doing a systems check or a fault is logged.

Seat belt being worn

Off

Engine Coolant Temperature

--

[ordm ] C

This parameter displays the current temperature of the coolant in the vehicle in degrees.

Engine Speed

--

RPM

This parameter displays the speed of the crankshaft as calculated by the control module based on inputs from the crankshaft position (CKP) sensor. The scan tool will display the engine speed in revolutions per minute (RPM).

Fr. Fog Light Telltail

Front fog lamps activated

On

This parameter displays On, which will command the telltail lamp on the instrument cluster to illuminate when turned on.

Front fog lamps deactivated

Off

Fuel Used A

--

Litres

This parameter displays the total litres of fuel used since the trip computer was reset.

Fuel Used B

--

Litres

This parameter displays the total litres of fuel used since the trip computer was reset.

High Beam Telltail

High beam activated

On

This parameter displays On, which will command the telltail lamp on the instrument cluster to illuminate when turned on.

High beam deactivated

Off

Ignition Switch

Ignition is in OFF position

Off

This parameter displays the current status of the ignition switch.

Ignition is in ACC position

Off

Ignition is in RUN position

On

Ignition is in CRANK position

On

Left Scroll Switch

--

Counts

This parameter displays the position of the left scroll switch.

 

Odometer

--

Km

This parameter displays the odometer reading which calculates the distance travelled based on information from the ECM.

Phone

Phone activated

On

This parameter displays the commanded state of a connected mobile phone.

Phone deactivated

Off

Rear Fog Light Telltail

Rear fog lights activated

On

This parameter displays On, which will command the telltail lamp on the instrument cluster to illuminate when turned on.

Rear fog lights deactivated

Off

Remaining Fuel

--

%/ L

This parameter displays the remaining fuel as either a percentage or in litres.

Right Scroll Switch

--

Counts

This parameter displays the position of the right scroll switch.

 

Shift Up Indicator

Shift up indicator activated

On

This parameter displays the status of the shift up light.

Shift up indicated deactivated

Off

SRS Air Bag Telltail

Systems check or fault with the system

On

This parameter displays On, which will command the telltail lamp on the instrument cluster to illuminate when doing a systems check or a fault is logged.

Systems are normal

Off

Steering Wheel Switch

Left scroll pressed

Menu Enter

This parameter displays the position of the steering wheel switch.

Left scroll in idle position

Off

System Power Mode

Ignition is in OFF position

Off

This parameter displays the system power mode which is dependant on ignition position.

Ignition is in ACC position

ACC

Ignition is in RUN position

Run

Ignition is in CRANK position

Crank

Time To Arrival

--

day(s)

This parameter displays the total days remaining till arrival.

Time To Arrival

--

00:00:00 (hh:mm:ss)

This parameter displays the time to arrival at a programmed destination.

Tyre Pressure Monitoring Telltail

Systems check or fault with the system

On

This parameter displays On, which will command the telltail lamp on the Instrument Cluster to illuminate when doing a systems check or a fault is logged.

System is normal

Off

Trip A Distance

--

Km

This parameter displays the total kilometers travelled since last reset.

Trip A Time

--

day(s)

This parameter will display the total days remaining till arrival.

Trip A Time

--

00:00:00 (hh:mm:ss)

This parameter will display the engine running time during this ignition cycle.

Trip B Distance

--

Km

This parameter displays the total kilometres travelled since last reset.

Trip B Time

--

day(s)

This parameter displays the total days remaining till arrival.

Trip B Time

--

00:00:00 (hh:mm:ss)

This parameter will display the engine running time during this ignition cycle.

Turn Left Signal Telltail

Turn left signal activated

On

This parameter displays On, which will command the telltail lamp on the instrument cluster to illuminate when the turn signal switch is activated.

Turn left signal deactivated

Off

Turn Right Signal Telltail

Turn right signal activated

On

This parameter displays On, which will command the telltail lamp on the instrument cluster to illuminate when the turn signal switch is activated.

Turn left signal deactivated

Off

Vehicle Speed

--

Km/h

This parameter indicates the vehicle speed calculated by the control module based on an input from the vehicle speed sensor (VSS). The scan tool will display a high value at higher vehicle speeds, and a low value at lower vehicle speeds.

Washer Level Switch

Low washer level

On

This parameter displays the position of the washer level switch.

Normal washer level

Off