For 1990-2009 cars

### Diagnostic Instructions

• | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

• | Review Strategy Based Diagnosis for an overview of the diagnostic approach.

• | Diagnostic Procedure Instructions provide an overview of each diagnostic category.

### DTC Descriptor

DTC P2107: Throttle Actuator Control (TAC) Module Internal Circuit

### Circuit/System Description

The engine control module (ECM) controls the throttle valve by applying a varying voltage to the throttle actuator control motor. The ECM monitors the actual throttle valve position using throttle position (TP) sensor 1 and 2. The ECM amplifies the TP sensor 1 signal in order to obtain a more accurate signal. The ECM monitors the TP sensor 1 amplification output whenever the ignition is ON and a closed throttle test is performed.

### Conditions for Running the DTC

• | The vehicle speed is 0 km/h (0 mph).

• | The engine speed is less than 40 RPM.

• | The engine coolant temperature (ECT) is 5-85°C (41-185°F).

• | The intake air temperature (IAT) is 5-60°C (41-140°F).

• | The ignition 1 voltage is more than 10 volts.

• | The accelerator pedal position (APP) is less than 15 percent.

• | The ECM is performing the closed throttle test with the ignition ON and the engine OFF.

• | DTC P2107 runs once the above conditions are met during the throttle actuator control system initialization.

### Conditions for Setting the DTC

The ECM detects the internal TP sensor 1 amplification output does not correlate with the TP sensor 1 signal voltage for more than 4 seconds.

### Action Taken When the DTC Sets

DTC P2107 is a Type C DTC.

### Conditions for Clearing the DTC

DTC P2107 is a Type C DTC.

### Circuit/System Verification

1. Ignition ON, observe the DTC information with a scan tool for 30 seconds. DTC P2107 should not set.

⇒ | If DTC P2107 sets, replace the ECM.

2. If the vehicle passes the Circuit/System Verification Test, then operate the vehicle within the conditions for running the DTC. You may also operate the vehicle within the conditions that are captured in the Freeze Frame/Failure Records List.

### Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for engine control module replacement, setup, and programming