Freeze Frame Data

a. Freeze frame data records the engine conditions (fuel system, calculated load, engine coolant temperature, fuel trim, engine speed, vehicle speed, etc.) when a malfunction is detected. When troubleshooting, freeze frame data can help determine if the vehicle was running or stopped, if the engine was warmed up or not, if the air-fuel ratio was Lean or Rich, and other data from the time the malfunction occurred.

b The intelligent tester records freeze frame data in five different instances' 1) 3 times before the

2006 TRANSMISSION A750F Automatic Transaxle - Sequoia

DTC is set, 2) once when the DTC is set, and 3) once after the DTC is set. These data can be used to simulate the vehicle's condition around the time when the malfunction occurred. The data may help find the cause of the malfunction, or judge if the DTC is being caused by a temporary malfunction or not.

Fig. 18: Blinking Pattern - DTC

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

Fig. 18: Blinking Pattern - DTC

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

Do It Yourself Car Diagnosis

Do It Yourself Car Diagnosis

Don't pay hundreds of dollars to find out what is wrong with your car. This book is dedicated to helping the do it yourself home and independent technician understand and use OBD-II technology to diagnose and repair their own vehicles.

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