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 MANUALSFORD2005CROWN VICTORIA SPECIAL EDITIONREPAIR AND DIAGNOSISTRANSMISSIONAUTOMATIC TRANSAUTOMATIC TRANSMISSIONDIAGNOSIS AND TESTINGDIAGNOSTIC FLOW CHART

2005 Ford Crown Victoria Special Edition

Diagnostic Flow Chart

2005 Ford Crown Victoria Special EditionSECTION Diagnostic Flow Chart

DIAGNOSTIC FLOW CHART

WARNING: If equipped with fire suppression system, refer to FIRE SUPPRESSION SYSTEM for Important Safety Warnings. Know and understand the customer concerns Check the fluid level and condition Verify the concern by operating the vehicle Check for non-factory-installed items and verify correct installation Check the shift linkage adjustments Check TSBs and OASIS messages for vehicle concerns Carry out quick test both KOER and KOEO Record all codes 1) Did you record any diagnostic trouble codes	Yes	REPAIR all hard diagnostic trouble codes. FOLLOW the pinpoint tests. See INTRODUCTION - GASOLINE article first, then this Workshop Manual.
	No	REFER to DIAGNOSIS BY SYMPTOM in this section, then GO to Step 5.
2) Are any continuous test memory codes present?	Yes	CLEAR codes and CARRY OUT drive cycle test.
2) Are any continuous test memory codes present?	No	GO to Step 4.
3) Did the continuous test memory codes reappear?	Yes	REPAIR all continuous test memory codes. FOLLOW the pinpoint tests. See INTRODUCTION - GASOLINE article then the transmission reference manual, then this workshop manual, then GO to Step 4.
3) Did the continuous test memory codes reappear?	No	GO to Step 4.
4) Is the concern repaired?	Yes	CARRY OUT the final quick test to verify that no diagnostic trouble codes are present. CLEAR memory codes.
4) Is the concern repaired?	No	REFER to DIAGNOSIS BY SYMPTOM in this section.
5) Are there any electrical concerns?	Yes	INSTALL the diagnostic tool and CARRY OUT the output state control test, then GO to Step 6.
5) Are there any electrical concerns?	No	REFER to the to diagnose and REPAIR the concern, then GO to Step 7.
6) Was the transmission concern corrected when the diagnostic tool was installed?	Yes	See INTRODUCTION - GASOLINE article , intermittent fault diagnosis section and use the diagnostic tool to diagnose cause of concern in the processor, vehicle harness or external inputs (sensors or switches).
	No	REFER to the hydraulic and mechanical routine to diagnose the concern, then GO to Step 7.
7) Is the concern repaired?	Yes	CARRY OUT the final quick test to verify that no diagnostic trouble codes are present. CLEAR memory codes.
7) Is the concern repaired?	No	Repaeat testing as necessary.

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.