U0107

DTC U0107

DESCRIPTION




The DTC U0107 Lost Communication With the Throttle Actuator Control (TAC) Module diagnostic monitors the communication between the TAC module and the powertrain control module (PCM). The TAC module and the PCM communicate on a serial data line. If the PCM can not communicate with the TAC module, DTC U0107 sets.

DTC DESCRIPTOR
This diagnostic procedure supports the following DTC.
DTC U0107 Lost Communication With the Throttle Actuator Control (TAC) Module

CONDITIONS FOR RUNNING THE DTC
- DTC P0122, P0123, P0222, P0223, P0641, P0651, P2100, P2101, P2108, P2122, P2123, P2127, P2128, P2135, P2138, and P2176 are not set.
- The ignition is ON.
- Battery voltage is at least 8.0 volts.
- DTC U0107 runs continuously once the above conditions are met.

CONDITIONS FOR SETTING THE DTC
Either of the conditions below is present for at least 250 milliseconds:
- The PCM did not detect any signal on the serial data line.
- The serial data signal is unreadable.

ACTION TAKEN WHEN THE DTC SETS
- The PCM illuminates the malfunction indicator lamp (MIL).
- The PCM records the operating conditions at the time the diagnostic fails. This information will be stored in the Freeze Frame buffer.

CONDITIONS FOR CLEARING THE MIL/DTC
- The MIL turns OFF after 3 consecutively passing trips without a fault present.
- A history DTC clears after 40 consecutive warm-up cycles without a fault.
- Perform the scan tool Clear DTC Information function.

TEST DESCRIPTION

Steps 1-13:

Steps 14-19:

The numbers below refer to the step numbers in the diagnostic table.
1. The Diagnostic System Check-Computers and Control Systems prompts the technician to complete some basic checks and store the Freeze Frame data on the scan tool if applicable. This creates an electronic copy of the data taken when the fault occurred. The information is then stored in the scan tool for later reference.
7. This step checks for an open in the ignition positive voltage supply to the TAC module.
8. This step checks for an open in the TAC module electrical grounds. The TAC module can not operate correctly if there are faulty electrical grounds.
17. After replacing the PCM a new minimum throttle position and idle speed must also be established.