Circuit Description
The internal fault detection is handled inside the control module. No external circuits are involved.
Conditions for Running the DTC
The control module runs a program to detect any internal errors when power up is commanded. The only requirements are voltage and ground.
Conditions for Setting the DTC
The control module detects an internal module malfunction.
Action Taken When the DTC Sets
The microprocessor will not function properly. All Vehicle Theft Deterrent functions will be inoperative.
Conditions for Clearing the DTC
| • | The current DTC 055 will clear when the microprocessor makes a successful internal integity check after changing power modes from RUN to OFF and back to RUN. |
| • | A history DTC 055 will clear after 100 consecutive ignition cycles if the condition for the malfunction is no longer present. |
Diagnostic Aids
| • | This DTC may be stored as a history DTC with out affecting the operation of the module. If stored only as a history DTC and not retrieved as a current DTC, do not replace the module. |
| • | If this DTC is retrieved as both a Current and History DTC, replace the module. |
Step | Action | Yes | No |
|---|---|---|---|
1 | Perform the appropriate Diagnostic System Check. Refer to Diagnostic System Check - Theft Deterrent . Did you perform the control module diagnostic system check? | Go to Step 2 | |
2 | Is the DTC retrieved as a current and history DTC? | Go to Step 3 | Go to Diagnostic Aids |
3 |
Important: Perform the set up procedure for the control module if needed. Replace the control module. Refer to Theft Deterrent Module Replacement . Did you complete the replacement? | System OK | -- |
