AT1–54 AT340E (2JZ–GE) AUTOMATIC TRANSMISSION – TROUBLESHOOTING *1 "○" mark means "O/D OFF" indicator light blinks once every 2 seconds. "X" mark means "O/D OFF" indicator light never blinks. *2 "○" marks means the ECM memorizes the malfunction code if the ECM detects the diagnostic trouble code detection condition. *3 This indicates items for which "2 trip detection logic" is used. With this logic, when a logic malfunction is first detected, the malfunction is temporarily stored in the ECM memory. If the same case is detected again during the second drive test, this second detection causes the O/D OFF Indicator Light to blink. The 2 trip repeats the same mode twice. (However, the IG switch must be turned OFF between the 1st trip and 2nd trip.) Malfunction detection (1st time) (temporarily recorded) Driving pattern IG S/W ON IG S/W OFF IG S/W ON 1st trip Malfunction detection (2nd time) (warning light lights up) Driving pattern IG S/W OFF 2st trip 2 trip EM9413 206297 HINT: • If the malfunction returns to normal while a malfunction warning is being output, the O/D OFF indicator light stops blinking and goes off. However, the diagnostic trouble code is retained in memory until it is cleared from memory. • If the diagnosis system outputs a diagnostic trouble code even though the O/D OFF indicator was not blinking, there is intermittent trouble. Check all the connections in the circuits corresponding to that code. • If the vehicle speed sensors No.1 and No.2 happen to fail simultaneously, the ECM will neither alert the driver by blinking the O/D OFF indicator nor record any diagnostic trouble code. It will, however, decide that the vehicle can be driven only in 1st and none of the other gears, so shifting upward will then be prohibited. • Codes 46, 62, 63 and 64 are limited to short or open circuits in the electrical system comprised of the solenoids, wire harnesses, and connectors. The ECM is unable to detect mechanical trouble (sticking, for example) in the solenoid valves.