2007 TOYOTA SIENNA Service Repair Manual

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Page 1425 of 3000

TOYOTA SIENNA 2007 Service Repair Manual U151E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEMAX–59
AX
DESCRIPTION
This sensor detects the rotation speed of the input turbine. By comparing the input turbine speed signal
(NT) with the

U151E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEMAX–59
AX
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
appropriately controls the engine torque and hydraulic pressure according to various conditions. Thus,
providing smooth gear shift.
Reference (Using an oscilloscope):
Check the waveform between terminals NT+ and NT- of the ECM connector.
Standard: Refer to the illustration.
MONITOR DESCRIPTION
The NT terminal of the ECM detects a revolution signal from the speed sensor (NT) (input RPM). The
ECM calculates a gearshift comparing the speed sensor (NT) with the speed sensor (NC).
While the vehicle is operating in 2nd, 3rd, 4th or 5th gear in the shift position of D, if the input shaft
revolution is less than 300 rpm
*1although the output shaft revolution is more than 1,000 rpm *2, the ECM
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
DTC P0717 Turbine Speed Sensor Circuit No Signal
DTC No. DTC Detection Condition Trouble Area
P0717ECM detects conditions (a), (b) and (c) continuously for
5 sec. or more: (1-trip detection logic)
(a) Vehicle speed: 50 km/h (31 mph) or more
(b) Park/neutral position switch (NSW (STAR) and R) is
OFF
(c) Speed sensor (NT): less than 300 rpm• Open or short in transmission revolution sensor NT
(speed sensor NT) circuit
• Transmission revolution sensor NT (speed sensor
NT)
•ECM
• Automatic transaxle assembly
Te r m i n a l N T + - N T -
Tool setting 5 V/DIV., 0.5 ms./DIV.
Vehicle condition Vehicle speed 20 km/h (12 mph)
Related DTCs P0717: Speed sensor (NT)/Verify pulse input
Required sensors/Components Speed sensor (NT), Speed sensor (NC)
Frequency of operation Continuous
Duration 5 sec.
MIL operation Immediate
Sequence of operation None
C053419E13

Page 1426 of 3000

TOYOTA SIENNA 2007 Service Repair Manual AX–60U151E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM
AX
TYPICAL ENABLING CONDITIONS
TYPICAL MALFUNCTION THRESHOLDS
COMPONENT OPERATING RANGE
WIRING DIAGRAM
The monitor will run whenever t

Page 1427 of 3000

TOYOTA SIENNA 2007 Service Repair Manual U151E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEMAX–61
AX
INSPECTION PROCEDURE
(a) Check the speed sensor installation.
OK:
The installation bolt is tightened properly and there
is no clea

Page 1428 of 3000

TOYOTA SIENNA 2007 Service Repair Manual AX–62U151E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM
AX
Standard resistance (Check for short)
NG
OK
Tester Connection Specified Condition
E10-35 (NT+) - Body ground
10 k
or higher
E10-27

Page 1429 of 3000

TOYOTA SIENNA 2007 Service Repair Manual U151E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEMAX–63
AX
DESCRIPTION
The purpose of this circuit is to prevent the engine from stalling while driving in lock-up condition when
brakes are

Page 1430 of 3000

TOYOTA SIENNA 2007 Service Repair Manual AX–64U151E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM
AX
WIRING DIAGRAM
INSPECTION PROCEDURE
HINT:
Using the intelligent tester to read the DATA LIST allows the
values or states of switch

Page 1431 of 3000

TOYOTA SIENNA 2007 Service Repair Manual U151E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEMAX–65
AX
(g) According to the display on the tester, read the "DATA
LIST".
NOTICE:
In the table below, the value listed under "

Page 1432 of 3000

TOYOTA SIENNA 2007 Service Repair Manual AX–66U151E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM
AX
OK
REPLACE ECM

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