Toyota Celica 2005 Repair Manual page 914

DTC P0717
CIRCUIT DESCRIPTION
This sensor detects the rotation speed of the input turbine. By comparing the input turbine speed signal (NT)
with the counter gear speed sensor signal (NC), the ECM detects the shift timing of the gears and appropri-
ately controls the engine torque and hydraulic pressure in response to various conditions, thus performing
smooth gear shifting.
DTC No.
All conditions below are detected for 5 secs. or more
(1−trip detection logic)
(a) Gear change not being performed
(b) Gear position: 2nd, 3rd, 4th or 5th
(c) T/M input shaft rpm: 300 rpm or less
P0717
(d) T/M output shaft rpm: 1,000 rpm or more
(e) Park/neutral position switch: OFF
(f) Shift solenoid valves, park/neutral position switch and ve-
hicle speed sensor are in normal operation
MONITOR DESCRIPTION
The NT terminal of the ECM detects the revolving signal from speed sensor (NT) (input RPM). The ECM
outputs a gearshift signal comparing the speed sensor (NT) with the speed sensor (NC).
While the vehicle is operating in the 2nd, 3rd or O/D gear position in the shift position of D, if the input shaft
revolution is less than 300 rpm
detects the trouble, illuminates the MIL and stores the DTC.
*1: Pulse is not output or is irregularly output.
*2: The vehicle speed is 50 km/h (31 mph) or more.
MONITOR STRATEGY
Related DTCs
Required sensors/Components
Frequency of operation
Duration
MIL operation
Sequence of operation
2005 CELICA (RM1131U)
DIAGNOSTICS
Turbine Speed Sensor Circuit No Signal
DTC Detection Condition
*1
although the output shaft revolution is more than 1,000 rpm
P0717
Speed sensor (NT), Speed sensor (NC)
Continuous
5 sec.
Immediate
None
− AUTOMATIC TRANSAXLE (U240E)
S Open or short in input turbine (NT) speed sensor circuit
S Input turbine (NT) speed sensor
S ECM
S Automatic transaxle assembly
Input/Turbine speed sensor/Verify pulse input
913
Trouble Area
*2
, the ECM
DI−713
DIC6E−02