Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET2008HHR LS, AUTOMATICREPAIR AND DIAGNOSISGENERAL INFORMATIONOEM GENERAL INFORMATIONVEHICLE DIAGNOSTIC INFORMATIONSPECIFICATIONSTHEFT DETERRENT MODULE SCAN TOOL INFORMATION
2008 Chevrolet HHR LS, Automatic
Theft Deterrent Module Scan Tool Information
2008 Chevrolet HHR LS, AutomaticSECTION Theft Deterrent Module Scan Tool Information
Theft Deterrent Module Scan Tool Data Parameters
| Parameter | System State | Expected Value | Description |
|---|---|---|---|
| Operating Conditions: Ignition ON | |||
| Auto Learn | - | Disabled | The scan tool displays Enabled or Disabled. This is the state of the automatic learn. |
| Auto Learn Counter | - | Varies | This displays Counts. |
| Auto. Learn Timer | - | Varies | This displays min. |
| Battery Voltage | - | Varies | This displays Volts. This is the current battery voltage. |
| Ignition Voltage | - | Varies | This displays Volts. This is the current ignition voltage. |
| Learned Keys Required | - | Varies | The scan tool displays 1 or 2. This is the required number of learned keys. |
| Master Keys Learned | - | Varies | This displays Counts. |
| PCM Auto. Learn Timer | - | Inactive | The scan tool displays Active or Inactive. This is the state of the automatic learn timer. |
| PCM Fail Enable | - | Inactive | The scan tool displays Active or Inactive. This is the state of the fail enable. |
| PCM Fuel Continue | - | Inactive | The scan tool displays Active or Inactive. This is the state of the fuel continue. |
| PCM Password Learning | - | Inactive | The scan tool displays Active or Inactive. This is the state of the password learning. |
| PCM Password Status | - | Valid | The scan tool displays Tamper, Undecided, Valid or No Info. |
| Power Mode | - | Run | The scan tool displays Off, Accessory, Run or Crank Request. This is the state of the ignition switch. |
| Previous TDM State | - | Varies | The scan tool displays 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 or VIN Timer. |
| Tamper Status | - | Inactive | The scan tool displays Active or Inactive. |
| TDM State | - | Varies | The scan tool displays 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 or VIN Timer. |
| Telltale Status | - | Off | The scan tool displays On, Off, Flash or Invalid. |
| Total Keys Learned | - | Varies | This displays Counts. |
| Transponder Key | - | Present | The scan tool displays Present or Not Present. |
| Valid Key | - | Yes | The scan tool displays Yes or No. |
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.