Toyota ZZT230 series Repair Manual page 406

DTC
CIRCUIT DESCRIPTION
This sensor detects the rotation speed of the input turbine. By comparing the input turbine speed signal (NT)
and 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.
OTC No.
The ECM
for 5 seconds or more.
(1-trlp
(a)
(b)
{c) Solenoid valves
P1725
(d) TIM Input shaft
(e) TIM
(a)
(b)
(c) Solenoid
(d)
(e) TIM
)
WIRING DIAGRAM
c
)
P1725 NT Revolution Sensor Circuit Malfunction
(Input Turbine Speed Sensor)
CondWon
DTC Detecting
detects {a). (b), {c), (d)
conditions
d&tection
bei
logic)
Gear QID
not
Gear Change n g
perfOrmed
position: 2nd, 3rd or gear
rpm:
and parklneutralposition switch
rpm: rpm
300 rpm or tess
no1
Gear 1 ,000
ou!pUt shaft
OlD
Gear
change
being perfOmled
position; 2nd, 3rd or gear
valves and parWneutral
input shaft rpm; 300 or less
TIM rpm
1 ,000 rpm Of less
output shaft rpm:
V2
Input Turbine
Speed Sensor
-
DIAGNOSTICS
AUTOMATIC TAANSAXLE
and (e) continuity
are normal •Open
•Input
or less
• EGM
position swilch are normal
B
Trouble A r ea
or short in input turbine (NT) speed sensor circuit
turbine (NT) speed sensor
ECM
NT•
NT -
01-195