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Transmission Drive Cycle Test

NOTE: The transmission drive cycle test must be followed exactly. Malfunctions have to occur 4 times consecutively for codes 645, 646, 647 and 648 to be set and 5 times consecutively for continuous code 628.
  1. After repairing any engine performance trouble codes, erase remaining transmission codes. Warm engine to normal operating temperature. Ensure transmission fluid level is correct. Shift transmission to drive "D". Press TCS on shifter handle. O/D OFF light should illuminate.
  2. Accelerate from stop to 40 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 transaxle in 4th gear, lightly depress brake pedal and release (to operate stoplights). Hold speed for at least an additional 5 seconds. Bring vehicle to stop for at least 20 seconds with transmission in drive "D". Repeat steps 1) and 2) at least 5 times. Perform Quick Test and record continuous codes.
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