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 MANUALSLINCOLN2009NAVIGATOR 4WDREPAIR AND DIAGNOSISQUICK LOOKUPSDTC INDEXGLASS, FRAMES, & MECHANISMS SYSTEMS DTCS
2009 Lincoln Navigator 4WD
Glass, Frames, & Mechanisms Systems DTCS
2009 Lincoln Navigator 4WDSECTION Glass, Frames, & Mechanisms Systems DTCS
SMART JUNCTION BOX (SJB) DIAGNOSTIC TROUBLE CODE (DTC) LIST
| DTC | Description | Action |
|---|---|---|
| B1302 | Accessory Delay Relay Coil Circuit Failure | If the accessory delay is always on, Go To PINPOINT TEST L
. If the accessory delay is inoperative, Go To PINPOINT TEST K . |
| B1304 | Accessory Delay Relay Coil Circuit Short to Battery | Go To PINPOINT TEST L . |
| All Other DTCs | - | REFER to the Master DTC Chart in MULTIFUNCTION ELECTRONIC MODULES . |
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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.