Toyota Celica 2005 Repair Manual page 1001

DI−800
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.
The ECM detects conditions (a), (b), (c), (d) and (e) continuity
for 5 secs. or more.
(1−trip detection logic)
(a) Gear change not being performed
P0717
(b) Gear position: 2nd, 3rd or 4th gear
(c) Solenoid valves and park/neutral position switch are normal
(d) T/M input shaft rpm: 300 rpm or less
(e) T/M output shaft rpm: 1,000 rpm or more
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, 4th or 5th 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 Detecting 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 (U341E)
S Open or short in input turbine speed sensor (NT) circuit
S Input turbine speed sensor (NT)
S ECM
Speed sensor (NT)/Verify pulse input
1000
Trouble Area
*2
, the ECM
DIC6B−02