Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSFORD2004EXCURSION 2WD V10-6.8L VIN SREPAIR AND DIAGNOSISTRANSMISSION AND DRIVETRAINAUTOMATIC TRANSMISSION/TRANSAXLETESTING AND INSPECTIONPINPOINT TESTSTORQSHIFT - AUTOMATIC TRANSMISSIONTEST E: PRESSURE (PSX) SWITCHES
2004 Ford Excursion 2WD V10-6.8L VIN S
Test E: Pressure (PSx) Switches
2004 Ford Excursion 2WD V10-6.8L VIN SSECTION Test E: Pressure (PSx) Switches
Before Pinpoint Tests
NOTE: Prior to entering pinpoint tests, check the Powertrain Control Module (PCM) wiring harness for correct connections, bent or broken pins, corrosion, loose wires, correct routing, correct seals and their condition. Check the PCM, sensors and actuators for damage. Refer to the Computers and Control Systems.
NOTE: If a concern still exists after electrical diagnosis has been carried out, refer to Diagnosis By Symptom.
If DTCs appear while carrying out the on-board diagnostics, refer to the Diagnostic Trouble Code Chart for the appropriate procedure. Prior to entering pinpoint tests, refer to any TSBs and OASIS messages for transmission concerns.
PINPOINT TEST E: PRESSURE (PSx) SWITCHES
NOTE: This pinpoint test for the (PSx) pressure switches only apply to vehicles that are equipped with the pressures switches installed in the valve body.
NOTE: Refer to the Transmission Vehicle Harness Connector illustration preceding these pinpoint tests.
NOTE: Refer to the Internal Harness Connector illustration preceding these pinpoint tests.
NOTE: Refer to the Pressure (PSx) Switch Chart preceding these pinpoint tests.
NOTE: Read and record all DTCs.
NOTE: Use the PID Chart for available diagnostic PIDs. Refer to Output State Control (OSC) Mode.
NOTE: Prior to entering pinpoint tests, check the Powertrain Control Module (PCM) wiring harness for correct connections, bent or broken pins, corrosion, loose wires, correct routing, correct seals and their condition. Check the PCM, sensors and actuators for damage. Refer to the Computers and Control Systems.
NOTE: If a concern still exists after electrical diagnosis has been carried out, refer to Diagnosis By Symptom.
If DTCs appear while carrying out the on-board diagnostics, refer to the Diagnostic Trouble Code Chart for the appropriate procedure. Prior to entering pinpoint tests, refer to any TSBs and OASIS messages for transmission concerns.
PINPOINT TEST E: PRESSURE (PSx) SWITCHES
NOTE: This pinpoint test for the (PSx) pressure switches only apply to vehicles that are equipped with the pressures switches installed in the valve body.
NOTE: Refer to the Transmission Vehicle Harness Connector illustration preceding these pinpoint tests.
NOTE: Refer to the Internal Harness Connector illustration preceding these pinpoint tests.
NOTE: Refer to the Pressure (PSx) Switch Chart preceding these pinpoint tests.
NOTE: Read and record all DTCs.
NOTE: Use the PID Chart for available diagnostic PIDs. Refer to Output State Control (OSC) Mode.
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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.