GM Service Manual Online
For 1990-2009 cars only

Parameter

Operating Conditions

Expected Value

Definition

Ignition is ON, engine OFF, and vehicle is stationary

Battery Reconnect

--

Yes

The scan tool displays Yes or No to indicate whether a battery reconnect. This is used for substitution detection to determine if a check needs to be made for substituted parts.

--

No

Engine Start Disable

Engine start disable activated

Yes

The scan tool displays if the engine start is disabled Yes or No.

Engine start disable deactivated

No

Ignition Voltage Status

--

Active

The scan tool displays if ignition voltage is not present.

Inactive

Immobilisation

Immobilisation activated

Active

The scan tool displays Active or Inactive to indicate the status of the immobilisation.

Immobilisation deactivated

Inactive

Invalid Transponder Key

--

Yes

The scan tool displays Yes if a transponder key is present.

No

Substitution Detection

--

Passed

The scan tool displays Passed/Failed for the substitution detection system.

--

Failed

System Power Mode

Ignition is in OFF position

Off

This parameter displays Off/Accessory/Run/Crank. This is the status of the system power mode dependent on the ignition position.

Ignition is in ACC position

Accessory

Ignition is in RUN position

Run

Ignition is in CRANK position

Crank

Tamper Status

--

Active

The scan tool displays whether theft is in the tamper state.

--

Inactive

Theft Deterrent DTC

--

Present

The scan tool displays whether a DTC has been logged or not.

--

Not Present

Theft Deterrent Status

--

Lrn Keys Stdby

This is dependent on the position of the ignition key.

--

Wakeup

--

Monitor Key

Theft Deterrent Telltail

--

On

The scan tool displays On if the theft deterrent system has been activated.

--

Off

Transponder Key ID Error

--

Yes

The scan tool will display Yes if the key id does not match the theft module.

--

No

Transponder Key Number

--

1

The scan tool displays 1/2/3/4. depending what key in the ignition.

--

2

--

3

--

4

Transponder Key Programmed

--

1/2/3/4

The scan tool displays the number of transponder keys programmed.

Valid Transponder Key

--

Yes

The scan tool displays Yes if a valid transponder key is present.

No

VIN Message Received

--

Yes

The scan tool displays whether a VIN message has been received.

--

No

VIN Received

--

Yes

The scan tool displays when the VIN has been received.

--

No

VIN Valid

--

Yes

The scan tool displays when a VIN is valid or not.

--

No

Wrong Transponder Key

--

Yes

The scan tool displays if the transponder key is correct or incorrect.

--

No