P2107

Schematic:

The throttle actuator control (TAC) module contains two throttle position sensors with a common 5 volt supply, a common ground, and two independent signal circuits that vary resistance according to changes in throttle plate position. The ECM measures the signal voltage from each TP sensor, which is a reduced value of the ECM 5 volt reference. The ECM reads the voltage levels from TP sensor 1, then converts the voltage level to a binary number. This binary number is limited to 0.019 volts/bit based on the range of 5 volts. At low throttle angle, the ECM needs to amplify the TP sensor 1 signal in order to obtain a more accurate binary number equivalent for very slight changes in throttle angle. The ECM will monitor the TP sensor 1 amplification output whenever a key-up closed throttle test or throttle body relearn procedure is performed. DTC P2107 will set if the TP sensor 1 amplification output does not correlate with the TP sensor 1 signal voltage.

DTC PARAMETERS
DTC P2107 will set if the ECM has determined that its internal TP sensor 1 amplification stage for low throttle input is not functioning correctly when:
^ During a once per key-up close throttle test or during a throttle body relearn procedure
^ Engine speed is less than 40 rpm
P^ Vehicle speed = 0 mph
^ ECT is between 5 and 100°C (41-212°F)
^ IAT is greater than 5°C (41°F)
^ Accelerator pedal angle is less than 15%
^ Main relay voltage is greater than 10 volts

DTC P2107 diagnostic runs during a key-up closed throttle test or throttle body relearn procedure when the above conditions have been met.

P2107 is a type D DTC.

DIAGNOSTIC AIDS

IMPORTANT: If a TP sensor 1 or 2 DTC is set, diagnose that DTC first.

This DTC indicates that the ECM can no longer correctly amplify the TP sensor signal at low throttle angle. Replace the ECM. Refer to DTC P0601 for reprogramming and learning procedures. P0601