AT2–79 A340E (2JZ—GTE) AUTOMATIC TRANSMISSION – TROUBLESHOOTING DTC 61 No.2 Vehicle Speed Sensor Circuit CIRCUIT DESCRIPTION The No. 2 vehicle speed sensor detects the rotation speed of the transmission output shaft and sends signals to the ECM. The ECM determines the vehicle speed based on these signals. An AC voltage is generated in the No.2 vehicle speed sensor coil as the rotor mounted on the output shaft rotates, and this voltage is sent to the ECM. The gear shift point and lock–up timing are controlled by the ECM based on the signals from this vehicle speed sensor and the throttle position sensor signal. If the No.2 vehicle speed sensor malfunctions, the ECM uses input signals from the No.1 vehicle speed sensor as a back–up signal. Rotor No.2 Vehicle Speed Sensor N S ECM +V Generated Waveform Output Voltage 0 –V Rotor No.2 Vehicle Speed Sensor AT5605 AT5598 G04362 DTC No. | Diagnostic Trouble Detection Condition | Trouble Area 61 All conditions below are detected. (2 trips detection logic)* (a) No No.2 vehicle speed sensor signal in 4 pulses of No. 1 vehicle speed sensor signal. (b) Vehicle speed: 9 km/h (5.6 mph) or more for 4 secs. or more. (c) Park/neutral position switch: OFF (Other than P or N position) No. 2 vehicle speed sensor Harness or connector between No.2 vehicle speed sensor and ECM ECM *: See page AT2–58 <Reference> Waveform between terminals SP2+ and SP2– when vehicle speed is approx. 60 km/h (37 mph). 0 V 5 V/division 2 msec./division AT8781