For 1990-2009 cars

Table 1: | Engine Control Module (ECM)
Table 2: | Theft Deterrent Module (TDM)

#### Engine Control Module (ECM)

Scan Tool Parameter | Data List | Units Displayed | Typical Data Value
--- | --- | --- | ---
Operating Conditions: Ignition ON, Engine OFF
VTD Fuel Enabled | Electrical/Theft Data | Yes/No | Yes
VTD Fuel Disable | Electrical/Theft Data | Active/Inactive | Inactive
VTD Fuel Disable Until Ign Off | Electrical/Theft Data | Yes/No | No
ECM in VTD Fail Enable | Electrical/Theft Data | Yes/No | No
VTD Password Learned | Electrical/Theft Data | Yes/No | Yes
VTD Auto Learn Times | Electrical/Theft Data | Active/Inactive | Inactive

#### Theft Deterrent Module (TDM)

Scan Tool Parameter | Data List | Units Displayed | Typical Data Value
--- | --- | --- | ---
Operating Conditions: Ignition ON, Engine OFF
Auto Learn | Learn Key Data | Enabled/Disabled | Enabled
Auto Learn Counter | TDM Data | Counts | 0
Auto Learn Timer | TDM Data | Minutes | 0
Battery Voltage | TDM Data | Volts | Varies
Ignition Voltage | TDM Data | Volts | Varies
Learned Keys Required | Learn Key Data | 1/2 | 1
Master Keys Learned | Learn Key Data | Counts | Varies
PCM Password Status | TDM Data | Undecided/Tamper/Valid/No Info. | Valid
PCM Auto Learn Timer | Powertrain Status | Inactive/Active | Inactive
PCM Fail Enable | Powertrain Status | Inactive/Active | Inactive
PCM Fuel Continue | Powertrain Status | Inactive/Active | Active
PCM Password Learning | Powertrain Status | Disabled/Enabled | Disabled
Power Mode | TDM Data | Off/Accessory/Run/Crank Request | Run
Previous TDM State | TDM Data | Asleep/Wakeup/Normal/Learn Passkey/Tamper/Monitor Key/Fail Pending/Fail Enabled/Lrn Keys Stdby/Learn More Keys/Learn Pending/Auto Learn/Auto. Lrn. Done/No Coded Key/Check Second Key/VIN Check/VIN Timer | Normal
Tamper Status | TDM Data | Inactive/Active | Inactive
Telltale Status | TDM Data | Off/On/Flash/Invalid | Off
TDM State | TDM Data | Asleep/Wakeup/Normal/Learn Passkey/Tamper/Monitor Key/Fail Pending/Fail Enabled/Lrn Keys Stdby/Learn More Keys/Learn Pending/Auto Learn/Auto. Lrn. Done/No Coded Key/Check Second Key/VIN Check/VIN Timer | Normal
Total Keys Learned | Learn Key Data | Counts | Varies
Transponder Key | Learn Key Data | Not Present/Present | Present
Valid Key | Learn Key Data | No/Yes | Yes