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HOMESERVICE MANUALSFORD1993CROWN VICTORIA LXREPAIR AND DIAGNOSISTRANSMISSIONAUTOMATIC TRANSDIAGNOSIS - AODE & AODE-W (W/EEC-IV)QUICK TESTTRANSMISSION DRIVE CYCLE TEST
1993 Ford Crown Victoria LX

Transmission Drive Cycle Test

1993 Ford Crown Victoria LXSECTION Transmission Drive Cycle Test
NOTE: The transmission drive cycle test must be followed exactly. Malfunctions have to occur 4 times consecutively for codes 617, 618 and 619 to be set and 5 times consecutively for continuous code 628.
  1. Record and then erase Quick Test codes. Warm engine to normal operating temperature. Ensure transmission fluid level is correct. Shift transmission to overdrive (OD).
  2. Accelerate from stop to 50 mph. Hold speed for at least 15 seconds (30 seconds above 4000 ft.). Press TCS and accelerate to 50 mph. Hold speed for at least 15 seconds (30 seconds above 4000 ft.). Hold speed and throttle position steady for at least 15 seconds. While maintaining speed with transmission in 4th gear, lightly depress brake pedal and release. Maintain speed for additional 5 seconds. Bring vehicle to stop for at least 20 seconds. Repeat steps 1) and 2) at least 5 times. Perform Quick Test and record continuous codes.
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.