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 MANUALSFORD2010MUSTANG BASE, 2D COUPE, AUTOMATICREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 939 (MODULE COMMUNICATIONS NETWORK SYSTEM)DIAGNOSTIC TESTSCOMMUNICATIONS NETWORKINSPECTION AND VERIFICATION
2010 Ford Mustang Base, 2D Coupe, Automatic
Inspection and Verification
2010 Ford Mustang Base, 2D Coupe, AutomaticSECTION Inspection and Verification
WARNING: This page is about a different car, the 2007 Mercury Mariner and 2007 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.
- Verify the customer concern.
- Visually inspect the following for obvious signs of electrical damage.VISUAL INSPECTION CHART
Electrical - Battery junction box (BJB) fuse(s):
- 4 (5A) (no communication with powertrain control module [PCM])
- 11 (10A) (no communication with PCM)
- 15 (30A) (no communication with anti-lock brake system [ABS] module)
- Smart junction box (SJB) fuse(s):
- 4 (10A) (no communication with the smart junction box [SJB])
- 6 (15A) (no communication with the SJB)
- 7 (10A) (no communication with instrument cluster, no power to scan tool)
- 17 (15A) (no communication with SJB)
- 18 (10A) (no communication with four wheel drive [4WD] control module)
- 22 (10A) (no communication with instrument cluster)
- 28 (10A) (no communication with instrument cluster)
- 29 (10A) (no communication with parking aid module)
- 33 (15A) (no communication with restraints control module [RCM])
- 34 (5A) (no communication with ABS module)
- 35 (5A) (no communication with 4WD control module)
- Data link connector (DLC)
- Wiring harness
- Circuitry
- Battery junction box (BJB) fuse(s):
- If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.
NOTE:
Make sure to use the latest scan tool software release.
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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.