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 MANUALSFORD2004MUSTANG BASE, 2D COUPE, 3.9 6, AUTOMATICREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 2539 (ENGINE CONTROLS - POWERTRAIN DTC CHARTS & DESCRIPTIONS - DTC P0600 THROUGH DTC P164A - (EXCEPT DIESEL & HYBRID))DTC P0690: ELECTRONIC CONTROL MODULE (ECM)/POWERTRAIN CONTROL MODULE (PCM) POWER RELAY SENSE CIRCUIT HIGH
2004 Ford Mustang Base, 2D Coupe, 3.9 6, Automatic
DTC P0690: Electronic Control Module (ECM)/Powertrain Control Module (Pcm) Power Relay Sense Circuit High
2004 Ford Mustang Base, 2D Coupe, 3.9 6, AutomaticSECTION DTC P0690: Electronic Control Module (ECM)/Powertrain Control Module (Pcm) Power Relay Sense Circuit High
WARNING: This page does not describe the selected car, but rather 32 other vehicles, including the 2011 Mercury Milan, 2011 Mercury Mariner, 2011 Mercury Grand Marquis, 2011 Lincoln Town Car, and 2011 Lincoln Navigator L. However, it is still accessible from the selected car via links, so may be relevant.
P0690 - ELECTRONIC CONTROL MODULE (ECM)/POWERTRAIN CONTROL MODULE (PCM) POWER RELAY SENSE CIRCUIT HIGH
| Description: | This DTC sets when the voltage on the ignition switch position run (ISP-R) and the fuel injector power monitor (INJPWRM) circuit voltages do not correspond for a calibrated period of time. This DTC sets when the voltage on the ISP-R and the INJPWRM circuit voltages do not correspond for a calibrated period of time. | ||
| Possible Causes: |
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| Diagnostic Aids: | The INJPWRM PID voltage should be greater than 10.5 volts when the ignition is in the ON position. | ||
| Application | Key On Engine Off | Key On Engine Running | Continuous Memory |
| All | GO to PINPOINT TEST B . | ||
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.