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 MANUALSFORD1993E 350 VAN V8-7.3L DSLREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTTRANSMISSION CONTROL SYSTEMSTESTING AND INSPECTIONPINPOINT TESTSPINPOINT TEST INSTRUCTIONS
1993 Ford E 350 Van V8-7.3L DSL
Pinpoint Test Instructions
1993 Ford E 350 Van V8-7.3L DSLSECTION Pinpoint Test Instructions
- Begin with non-transmission related DTCs, then service any transmission related DTCs. Refer to the EEC-IV On-Board Diagnostic Trouble Code Description Chart for information on Condition and Symptoms. This chart will be helpful to aid in diagnosing internal transmission concerns and external non-transmission inputs.
- The Pinpoint Tests are used in diagnosing electrical concerns of the E4OD transmission. Make sure that the vehicle wiring harness and the PCM are diagnosed as well.
- The vehicle wiring harness, PCM and non-transmission sensors may affect transmission operations. Service these concerns first.
- Prior to entering Pinpoint Tests, check the PCM wiring harness for proper connections, bent or broken pins, corrosion, loose wires, proper routing, proper seals and their condition. Check the PCM, sensors and actuators for damage.
- If DTCs appear while performing the On-Board Diagnostics refer to the EEC-IV On-Board Diagnostic Trouble Code Description Chart for the appropriate service procedure.
- Prior to entering Pinpoint Tests, refer to any TSBs for E4OD transmission concerns.
- After Electrical Diagnosis has been performed and a concern still exists, refer to the Electrical/Hydraulic/Mechanical Diagnosis charts.
- The Pinpoint Tests are used in diagnosing electrical concerns of the E4OD transmission. Make sure that the vehicle wiring harness and the PCM are diagnosed as well.
- The vehicle wiring harness, PCM and non-transmission sensors may affect transmission operations. Service these concerns first.
- Prior to entering Pinpoint Tests, check the PCM wiring harness for proper connections, bent or broken pins, corrosion, loose wires, proper routing, proper seals and their condition. Check the PCM, sensors and actuators for damage.
- If DTCs appear while performing the On-Board Diagnostics refer to the EEC-IV On-Board Diagnostic Trouble Code Description Chart for the appropriate service procedure.
- Prior to entering Pinpoint Tests, refer to any TSBs for E4OD transmission concerns.
- After Electrical Diagnosis has been performed and a concern still exists, refer to the Electrical/Hydraulic/Mechanical Diagnosis charts.
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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.