P1A04 - Generator Shutdown Circuit

2007 Ford Escape Base, 2.3 Z, FWD, AutomaticSECTION P1A04 - Generator Shutdown Circuit
WARNING: This page is about a different variant/trim than selected.
P1A04 - GENERATOR SHUTDOWN CIRCUIT

Description:  The transaxle control module (TCM) continuously monitors the generator shutdown (GSDN) circuit and the controller area network (CAN) signal for a GSDN request from the powertrain control module (PCM). This DTC is set when the PCM requests generator shutdown through the CAN signal or if there is a GSDN circuit concern. The generator inverter will be disabled.
Possible Causes: 
  • GSDN circuit open
  • GSDN circuit short to PWR or GND
  • PCM GSDN request
  • Damaged TCM
  • Damaged PCM
Diagnostic Aids:  With the PCM and TCM connected and with the key in ON position, check the GSDN signal frequency. If the frequency is between 49 and 75 Hz DC, no circuit problem is indicated and PCM generator shutdown is requested.
Application  Key On Engine Off  Key On Engine Running  Continuous Memory 
All   refer to PINPOINT TEST QE .
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.