For 1990-2009 cars

Table 1: | Body Control Module (BCM)
Table 2: | Engine Control Module (ECM)
Table 3: | Theft Deterrent Module (TDM)

#### Body Control Module (BCM)

Scan Tool Parameter | Data List | Units Displayed | Typical Data Value
--- | --- | --- | ---
Operating Conditions: Ignition ON, Engine OFF
Theft LED | Theft Data | On/Off | Off

#### Engine Control Module (ECM)

Scan Tool Parameter | Data List | Units Displayed | Typical Data Value
--- | --- | --- | ---
Operating Conditions: Ignition ON, Engine OFF
ECM Authentication Status | Engine Electrical | Unknown/Incorrect/Negative/Valid | Valid
ECM Challenge Status | Engine Electrical | Valid/Invalid | Valid
ECM Response Source | Engine Electrical | Normal/Remote Start | Normal
VTD Auto Learn Counter | Engine Electrical | Counts | Varies
VTD Auto Learn Timer | Engine Electrical | Active/Inactive | Inactive
VTD Password Learn Enabled | Engine Electrical | Yes/No | No
VTD Security Code Accepted | Engine Electrical | Yes/No | Yes
VTD Security Code Lockout | Engine Electrical | Active/Inactive | Inactive
VTD Security Code Programmed | Engine Electrical | Yes/No | Yes
VTD Security Info Programmed | Engine Electrical | Yes/No | Yes
VTD System Status | Engine Electrical | Standby/Fuel Disable/Dis. No Resp./Dis. Neg. Resp./Dis. Incor. Resp./Post Release/Pre-Release/Released | Released

#### Theft Deterrent Module (TDM)

Scan Tool Parameter | Data List | Units Displayed | Typical Data Value
--- | --- | --- | ---
Operating Conditions: Ignition ON, Engine OFF
Auto Learn Counter | TDM Data | Counts | Varies
Auto Learn Timer | TDM Data | Minutes | Varies
Battery Reconnect | TDM Data | Yes/No | No
Ignition Voltage Signal | TDM Data | Present/Not Present | Present
Immobilization | TDM Data | Active/Inactive | Inactive
Immobilizer Programmed | Powertrain Status | Yes/No | Yes
Master Keys Learned | Learn Key Data | Counts | Varies
PCM Auto Learn Timer | Powertrain Status | Active/Inactive | Inactive
PCM Password Learning | Powertrain Status | Disabled/Enabled | Disabled
Power Mode | TDM Data | Off/Accessory/Run/Crank Request | Run
Powertrain DTC | Powertrain Status | Yes/No | No
Previous TDM State | TDM Data | Asleep/Wakeup/Normal/Learn Passkey/Tamper/Monitor Key/Fail Pending/Lrn Keys Stdby/Learn More Keys/Learn Pending/Auto Learn/Auto Lrn Done/No Coded Key | Varies
Security Code Programmed | Powertrain Status | Yes/No | Yes
Start Disabled | TDM Data | Yes/No | No
Telltale Status | TDM Data | Off/On/Flash/Invalid | Off
Tamper Status | TDM Data | Active/Inactive | Inactive
TDM State | TDM Data | Asleep/Wakeup/Normal/Learn Passkey/Tamper/Monitor Key/Fail Pending/Lrn Keys Stdby/Learn More Keys/Learn Pending/Auto Learn/Auto Lrn Done/No Coded Key | Normal
Theft Problem | TDM Data | Yes/No | No
Total Keys Learned | Learn Key Data | Counts | Varies
Transponder Key | Learn Key Data | Present/Not Present | Present
Valid Key | Learn Key Data | Yes/No | Yes
VIN Message Received | TDM Data | Yes/No | Yes