Normal Mode
- Verify "CHECK ENGINE" light circuit is operational. Ensure battery voltage is above 11 volts and charging system is okay. Engine must be at normal operating temperature.
- Transmission/transaxle must be in Neutral or Park. Air conditioner and other accessories must be off. Throttle valve must be closed (throttle position idle contacts closed).
- To enter normal mode, turn ignition switch to "ON" position with engine off. Place jumper wire across "TE1" and "E1" terminals in TOYOTA DIAGNOSTIC COMMUNICATION LINK (TDCL). TDCL is under the left side of instrument panel and is NOT the same as under hood check connector. See Fig 1.
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
- Count number of flashes from "CHECK ENGINE" light. If system is operating properly (with no codes), "CHECK ENGINE" light will blink continuously and evenly. See Figure.
- A code will be identified by a .5 second flash on and off for the first number. A 1.5 second pause will occur followed by the second number. See Figure.
- If more than one code is stored, a 2.5 second pause will occur before second code is flashed. Once all codes have been displayed, a 4.5 second pause will occur and code(s) will repeat.
- Trouble codes are given from smallest number code to largest number code. After codes are retrieved, remove jumper wire to exit diagnostic mode.