Pinpoint Test H: Transmission Control Module Signal

2005 Ford Taurus SEL, 4D SedanSECTION Pinpoint Test H: Transmission Control Module Signal
WARNING: This page is about a different car, the 2005 Mercury Montego, 2005 Ford Freestyle, and 2005 Ford Five Hundred. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: The transmission control module (TCM) is integrated into the mechatronic assembly. If installing a new transaxle or a mechatronic assembly, the TCM will need to be checked and recalibrated (reflashed) to the latest level calibration available.
  1. H1 TRANSMISSION CONTROL MODULE SIGNAL OUT OF RANGE 
    • Check to make sure the transaxle harness connector is fully seated, pins are fully engaged in connector and in good condition before proceeding.
    • Connect the scan tool.
    • Key in ON position.
    • Enter the following diagnostic mode on the scan tool: PID: Ignition Voltage (D10B).
    • Is the ignition voltage between 11 and 15 volts. 
    1. Yes  : GO to H2.
    2. No  : REPAIR the open or short circuit harness side.
  2. H2 TRANSMISSION CONTROL MODULE SIGNAL OUT OF RANGE 
    • Connect the scan tool.
    • Key in ON position.
    • Enter the following diagnostic mode on the scan tool: PID: VPWRTCM.
    • Is the operating voltage between 11 and 15 volts. 
    1. Yes  : System operating correctly.
    2. No  : Fix other DTCs first. Charge the vehicle battery.
RENDER: 1.0x

NO RELATED

Recommended Tools & Savings

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Affiliate disclosure: We may earn a commission at no extra cost to you.

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • You smell fuel, burning insulation, or see smoke.
  • Brakes feel soft, pull hard to one side, or make grinding noises.
  • The engine overheats, stalls repeatedly, or misfires under load.
  • You are missing required tools, torque specs, or safe lifting equipment.
  • You are not confident in the next step or safety outcome.