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.
SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSFORD2004MUSTANG BASE, 2D COUPE, 3.9 6, AUTOMATICREPAIR AND DIAGNOSISBODY & FRAMEDOOR LOCKSKEYLESS ENTRY SYSTEM AND COMPUTER OPERATED LOCK SYSTEMDIAGNOSIS AND TESTINGKEYLESS ENTRYINSPECTION AND VERIFICATION
2004 Ford Mustang Base, 2D Coupe, 3.9 6, Automatic
Inspection and Verification
2004 Ford Mustang Base, 2D Coupe, 3.9 6, AutomaticSECTION Inspection and Verification
- The keyless entry system is a generic electronic module (GEM).
- Verify the customer concern by using the remote transmitters to operate the keyless entry system.
- Visually inspect for the following obvious signs of mechanical and electrical damage.VISUAL INSPECTION CHART
Mechanical Electrical - Binding latches
- Central junction box (CJB) fuse(s):
- (5A)
- 19 (15A)
- 25 (25A)
- Battery junction box (BJB) fuse POWER WINDOWS (40A)
- Damaged wiring harness
- Loose or corroded connector(s)
- Circuitry open/shorted
- Damaged relays
- Remote transmitter
- Remote transmitter batteries
- If the concern remains after the inspection, connect the diagnostic tool to the data link connector (DLC) located beneath the instrument panel and select the vehicle to be tested from the diagnostic tool menu. If the diagnostic tool does not communicate with the vehicle:
- check that the program card is correctly installed.
- check the connections to the vehicle.
- check the ignition switch position.
- If the diagnostic tool still does not communicate with the vehicle, refer to the diagnostic tool manual.
- Carry out the diagnostic tool data link test. If the diagnostic tool responds with:
- SCP or ISO circuit fault; all electronic control units, no response/not equipped, refer to MODULE COMMUNICATIONS NETWORK .
- No response/not equipped for GEM, GO to PINPOINT TEST A .
- System passed, retrieve and record the continuous diagnostic trouble codes (DTCs), erase the continuous DTCs, and carry out the self-test diagnostics for the GEM.
- If the DTCs retrieved are related to the concern, go to the GENERIC ELECTRONIC MODULE (GEM) DIAGNOSTIC TROUBLE CODE (DTC) INDEX to continue diagnostics.
- If no DTCs related to the concern are retrieved, proceed to Symptom Chart to continue diagnostics.
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
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.