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 MANUALSFORD2004ECONOLINE E150, VAN CARGO, 4.6 WREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCETESTING & DIAGNOSISENGINE CONTROLS - POWERTRAIN DTC CHARTS & DESCRIPTIONS - CNG, FLEX-FUEL & GASOLINEDIAGNOSTIC TROUBLE CODE (DTC) CHARTSP0703 - BRAKE SWITCH CIRCUIT INPUT MALFUNCTION
2004 Ford Econoline E150, Van Cargo, 4.6 W
P0703 - Brake Switch Circuit Input Malfunction
2004 Ford Econoline E150, Van Cargo, 4.6 WSECTION P0703 - Brake Switch Circuit Input Malfunction
P0703 - BRAKE SWITCH CIRCUIT INPUT MALFUNCTION
| Description: | Indicates the PCM did not receive a brake pedal position (BPP) input. | ||
| Possible Causes: |
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| Diagnostic Aids: | Check for proper function of the stoplamps. Using the diagnostic tool, check the BPP PID. The stoplamps and PID should toggle on and off with brake pedal activation. | ||
| Application | Key On Engine Off | Key On Engine Running | Continuous Memory |
| Town Car | REFER to the appropriate EXTERIOR LIGHTING article for further diagnosis of the lighting control module LCM system. Make sure the break pedal was applied and released for the KOER self-test and the break pedal was applied for the KOEO self-test. | REFER to the appropriate EXTERIOR LIGHTING article for further diagnosis of the lighting control module LCM system. Make sure the break pedal was applied and released for the KOER self-test and the break pedal was applied for the KOEO self-test. | REFER to the appropriate EXTERIOR LIGHTING article for further diagnosis of the lighting control module LCM system. Make sure the break pedal was applied and released for the KOER self-test and the break pedal was applied for the KOEO self-test. |
| Freestar/Monterey | REFER to the appropriate EXTERIOR LIGHTING article for further diagnosis of the Smart Junction Box (SJB). Make sure the break pedal was applied and released for the KOER self-test and the break pedal was applied for the KOEO self-test. | REFER to the appropriate EXTERIOR LIGHTING article for further diagnosis of the Smart Junction Box (SJB). Make sure the break pedal was applied and released for the KOER self-test and the break pedal was applied for the KOEO self-test. | REFER to the appropriate EXTERIOR LIGHTING article for further diagnosis of the Smart Junction Box (SJB). Make sure the break pedal was applied and released for the KOER self-test and the break pedal was applied for the KOEO self-test. |
| Expedition, Navigator | REFER to the appropriate ANTI-LOCK CONTROL article for further diagnosis of the cause of the incorrect brake pedal status from the ABS to the PCM. Make sure the break pedal was applied and released for the KOER self-test and the break pedal was applied for the KOEO self -test. | REFER to the appropriate ANTI-LOCK CONTROL article for further diagnosis of the cause of the incorrect brake pedal status from the ABS to the PCM. Make sure the break pedal was applied and released for the KOER self-test and the break pedal was applied for the KOEO self -test. | REFER to the appropriate ANTI-LOCK CONTROL article for further diagnosis of the cause of the incorrect brake pedal status from the ABS to the PCM. Make sure the break pedal was applied and released for the KOER self-test and the break pedal was applied for the KOEO self -test. |
| All Others | GO to FD: Brake Pedal Inputs STEP 2 | GO to FD: Brake Pedal Inputs STEP 1 | GO to FD: Brake Pedal Inputs STEP 3 |
RENDER: 1.0x
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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.