Circuit Description
The throttle actuator control (TAC) module contains data, which is essential for proper TAC system operation. The TAC module continuously tests the integrity of this data. If the TAC module detects a fault with electrically erasable programmable read only memory (EEPROM), the TAC module detects a low voltage while the voltage on the powertrain control module (PCM) is not low, or the TAC module detects the vehicle ID from the TAC module does not agree with the vehicle ID from the PCM, DTC P2107 sets.
DTC Descriptor
This diagnostic procedure supports the following DTC:
DTC P2107 Throttle Actuator Control (TAC) Module Internal Circuit
Conditions for Running the DTC
| • | DTCs P0606, P2108, U0107 are not set. |
| • | The ignition is in the Crank or Run position. |
Conditions for Setting the DTC
If the TAC module detects low voltage, a fault with the EEPROM or the vehicle ID recorded in the TAC module does not match the vehicle ID recorded in the PCM.
Action Taken When the DTC Sets
| • | The control module illuminates the malfunction indicator lamp (MIL) when the diagnostic runs and fails. |
| • | The control module records the operating conditions at the time the diagnostic fails. The control module stores this information in the Freeze Frame and/or the Failure Records. |
| • | The control module commands the TAC system to operate in the Reduced Engine Power mode. |
| • | A message center or an indicator displays Reduced Engine Power. |
| • | Under certain conditions the control module commands the engine OFF. |
Conditions for Clearing the DTC
| • | A current DTC Last Test Failed clears when the diagnostic runs and passes. |
| • | A history DTC clears after 40 consecutive warm-up cycles, if no failures are reported by this or any other non-emission related diagnostic. |
| • | Clear the DTC with a scan tool. |
Diagnostic Aids
If the DTC is determined to be intermittent, reviewing the Failure Records can be useful in determining when the DTC was last set.
Step | Action | Yes | No |
|---|---|---|---|
Schematic Reference: Engine Controls Schematics Connector End View Reference: Powertrain Control Module Connector End Views and Engine Controls Connector End Views | |||
1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | |
2 | Is DTC 2119 also set? | Go to Step 3 | |
3 |
Did the DTC fail this ignition? | Go to Step 4 | Go to Diagnostic Aids |
4 | Replace the throttle body assembly. Refer to Throttle Body Assembly Replacement . Did you complete the replacement? | Go to Step 5 | -- |
5 |
Did the DTC fail this ignition? | Go to Step 2 | Go to Step 6 |
6 |
Important: Be aware that repairing one individual condition may correct more than one DTC. Observe the Capture Info with a scan tool. Are there any DTCs that have not been diagnosed? | System OK | |
