Toyota Sequoia (2005). Manual — part 200
D14166
ECM:
NT+
NT–
E8
E7
E6
E5
E4
–
DIAGNOSTICS
AUTOMATIC TRANSMISSION
DI–595
789
3
Check harness and connector (ECM – speed sensor NT).
PREPARATION:
(a)
Connect the speed sensor connector.
(b)
Disconnect the ECM connector.
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:
Tester Connection
Specified Condition
20
C (68
F)
E7 – 35 (NT+) – E7 – 27 (NT–)
560 to 680
Ω
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:
Tester Connection
Specified Condition
E7 – 35 (NT+) – Body ground
10 k
Ω
or higher
E7 – 27 (NT–) – Body ground
↑
NG
Repair or replace the harness or connector
(See page
).
OK
Replace the ECM (See page
D14162
Clutch Drum
(Timing Rotor)
Input Speed Sensor NT
(Transmission Revolution Sensor NT)
Output Speed Sensor SP2
(Transmission Revolution Sensor SP2)
Parking Gear
(Timing Rotor)
C13480
D14149
GND
2 V/DIV
20 ms/DIV
DI–596
–
DIAGNOSTICS
AUTOMATIC TRANSMISSION
790
DTC
P0722
Output Speed Sensor Circuit No Signal
CIRCUIT DESCRIPTION
The speed sensor SP2 detects the rotation speed of the transmission output shaft and sends signals to the
ECM. The ECM determines the vehicle speed based on these signals. An AC voltage is generated in the
speed sensor SP2 coil as the parking gear mounted on the rear planetary gear assy rotates, and this voltage
is sent to the ECM. The parking gear on the rear planetary gear is used as the timing rotor for this sensor.
The gear shift point and lock–up timing are controlled by the ECM based on the signals from this vehicle
speed sensor and the throttle position sensor signal.
DTC No.
DTC Detection Condition
Trouble Area
P0722
All conditions below are detected 500 times or more continu-
ously (1–trip detection logic)
(a) No signal from speed sensor (SP2) is input to ECM while 4
pulses of No. 1 vehicle speed sensor signal are sent
(b) Vehicle speed is 9 km/h (6 mph) or more for at least 4 sec.
(c) Park/neutral position switch is OFF.
(d) Transfer position is except neutral (4WD).
Open or short in speed sensor (SP2) circuit
Speed sensor (SP2)
ECM
Automatic transmission (clutch, brake or gear, etc.)
Reference (Using an oscilloscope):
Check the waveform between terminals SP2+ and SP2–
of the ECM connector.
Standard: Refer to the illustration.
Terminal
SP2+ – SP2–
Tool setting
2V/DIV, 20ms/DIV
Vehicle condition
Vehicle speed 20 km/h (12 mph)
DIDJ9–01
D14163
ECM
SP2+
SP2–
34
26
Y–R
W–R
1
2
E7
E7
E1
V2
Vehicle Speed Sensor (SP2)
–
DIAGNOSTICS
AUTOMATIC TRANSMISSION
DI–597
791
MONITOR DESCRIPTION
The output speed sensor SP2 monitors the output shaft speed. The ECM controls the gearshift point and
the lock up timing based on the signals from the output speed sensor SP2 and throttle position sensor.
If the ECM detects no signal from the output shaft speed sensor SP2 even while the vehicle is moving, it
will conclude that is a malfunction of the output speed sensor SP2. The ECM will illuminate the MIL and set
a DTC.
MONITOR STRATEGY
Related DTCs
P0722
Speed sensor SP2/Verify pulse input
Required sensors/Components
Speed sensor SP2
Frequency of operation
Continuous
Duration
500 output shaft revolution
MIL operation
Immediate
Sequence of operation
None
TYPICAL ENABLING CONDITIONS
It
Specification
Item
Minimum
Maximum
The monitor will run whenever this DTC is
not present.
See page
Vehicle speed sensor pulse input
4
Vehicle speed range (4 sec. or more)
9 km/h (5.59 mph) or more
–
NSW switch
OFF
Battery voltage
8 V or more
–
Ignition switch
ON
Starter
OFF
TYPICAL MALFUNCTION THRESHOLDS
Detection criteria
Threshold
Output speed sensor pulse input
No input
WIRING DIAGRAM
D14164
OK
NG
5.4 N·m
(55 kgf·cm, 48 in.·lbf)
No Clearance
DI–598
–
DIAGNOSTICS
AUTOMATIC TRANSMISSION
792
INSPECTION PROCEDURE
HINT:
According to the DATA LIST displayed by the OBD II scan tool or hand–held tester, you can read the value
of the switch, sensor, actuator and so on without parts removal. Reading the DATA LIST as the first step of
troubleshooting is one method to shorten labor time.
(a)
Warm up the engine.
(b)
Turn the ignition switch off.
(c)
Connect the OBD II scan tool or hand–held tester to the DLC3.
(d)
Turn the ignition switch to the ON position.
(e)
Push the ”ON” button of the OBD II scan tool or the hand–held tester.
(f)
When you use the hand–held tester:
Select the item ”DIAGNOSIS / ENHANCED OBD II / DATA LIST”.
(g)
According to the display on the tester, read the ”DATA LIST”.
Item
Measurement Item/
Range (display)
Normal Condition
SPD (SP2)
Output shaft Speed/
min.: 0 km/h (0 mph)
max.: 255 km/h (158 mph)
Vehicle stopped: 0 km/h (0 mph)
[HINT]
Equal to vehicle speed
HINT:
SPD (SP2) is always 0 while driving:
Open or short in the sensor or circuit.
SPD (SP2) is always more than 0 and less than 300 rpm while driving the vehicle at 50 km/h (31 mph)
or more:
Sensor trouble, improper installation, or intermittent connection trouble of the circuit.
1
Inspect speed sensor installation.
PREPARATION:
Jack up the vehicle.
CHECK:
Check the speed sensor (SP2) installation.
OK:
The installation bolt is tightened properly and there is
no clearance between the sensor and transmission
case.
Torque: 5.4 N·m (55 kgf·cm, 48 in.·lbf)
NG
Replace speed sensor SP2 (See page
OK
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст