ATTE/A340 Automatic Trans (GTE) — Dtc 67 O D Direct Clutch Speed Sensor Circuit, page 89

AT2–89

A340E (2JZ—GTE) AUTOMATIC TRANSMISSION – TROUBLESHOOTING

DTC 67 O D Direct Clutch Speed Sensor Circuit

CIRCUIT DESCRIPTION

O/D Direct Clutch Drum

This sensor detects the rotation speed of the O/D input shaft
from the rotation of the O/D direct clutch drum.
Its construction is the same as that of the No.2 vehicle speed
sensor (See page AT2–79).
By comparing the O/D direct clutch speed signal and the No.2
vehicle speed sensor signal, the ECM detects the shift timing
of the gears and appropriately controls the engine torque and
hydraulic pressure in response to various conditions, thus
performing smooth gear shift.

O/D Direct Clutch
Speed Sensor

AT5609

DTC No. | Diagnostic Trouble Code Detection Condition | Trouble Area

All conditions below are detected for 4 secs. or
more.
(2 trips detection logic)*
(a) Gear position: 1st, 2nd or 3rd
(b) T/M input shaft rpm: 1000 rpm or more
(c) T/M output shaft rpm: Less than 300 rpm
(d) NSW OFF (other than P or N position)

67

O/D direct clutch speed sensor
Harness or connector between O/D direct
 clutch speed sensor and ECM
ECM

*: See page AT2–58

<Reference>
Waveform between terminals NCO+ and NCO– during engine idling.

GND                                                          1 V/div.

2 msec./division

AT8763