Diagnostic Instructions
DTC Descriptor
DTC P1516: Throttle Actuator Control (TAC) Module Throttle Actuator Position Performance
Circuit/System Description
The commanded throttle position (TP), based on accelerator pedal position (APP), is compared to the actual throttle position. The TP values should be within a calibrated range of each other. The throttle actuator control (TAC) module monitors the commanded
and the actual throttle position. If the TAC module detects that the commanded and actual throttle positions are not within a calibrated range of each other, the TAC module or the powertrain control module (PCM) cannot determine throttle position, or if both
TP sensors are invalid, a message is sent to the PCM across serial data and DTC P1516 is set.
Conditions for Running the DTC
| • | The ignition is in the Crank or Run position with the engine OFF. |
| • | The system voltage is more than 5.23 volts. |
| • | The system is not in Battery Saver mode. |
| • | The communication between the TAC module and the PCM must be valid. |
| • | The DTC runs continuously when the above conditions are met. |
Conditions for Setting the DTC
The TAC module detects the commanded and the actual throttle positions are not within a calibrated range of each other.
Action Taken When the DTC Sets
| • | DTC P1516 is a Type A DTC. |
| • | The control module commands the TAC system to operate in Reduced Engine Power mode. |
Conditions for Clearing the DTC
DTC P1516 is a Type A DTC.
Reference Information
Schematic Reference
Engine Controls Schematics
Connector End View Reference
Component Connector End Views
Description and Operation
Throttle Actuator Control (TAC) System Description
Electrical Information Reference
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
- If DTC P2108 is also set, refer to
Diagnostic Trouble Code (DTC) List - Vehicle.
- If DTC P0120 and P0220 are also set, refer to
Diagnostic Trouble Code (DTC) List - Vehicle.
- If DTC U0107 is also set with P0120, P0220, P2120 or P2125, refer to
Diagnostic Trouble Code (DTC) List - Vehicle.
- If DTC U0107 only is set, refer to
Diagnostic Trouble Code (DTC) List - Vehicle.
- Ignition OFF for 30 seconds.
- Ignition ON, observe the TP Sensor 1 and TP Sensor 2 parameters while moving the accelerator pedal to the fully applied position, and back to the at-rest position. The TP Sensor parameters should increase to 100 percent
as the accelerator pedal is moved to the fully applied position, and back tot he at-rest position as the accelerator pedal is released.
- Operate the vehicle within the Conditions for Running the DTC, or within the conditions that you observed from the Freeze Frame/Failure Records data.
Circuit/System Testing
Replace the throttle body assembly.
Repair Instructions
Perform the
Diagnostic Repair Verification after completing the diagnostic procedure.
Throttle Body Assembly Replacement
