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

--

Yes

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

--

No

Ignition Voltage Status

--

Active

The scan tool displays if ignition voltage is not present.

Inactive

Immobilisation

--

Active

The scan tool displays the immobilisation status.

--

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.

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 Stdb

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