parking sensors TOYOTA LAND CRUISER 1986 Factory Repair Manual

D11986
D13175Speed Sensor SP2
Parking Gear (Timing Rotor)
- DIAGNOSTICSAUTOMATIC TRANSMISSION
DI-421
614 Author
: Date
:
2004 LAND CRUISER (RM1071U)
DTC P0722 Output Speed Sensor Circuit No Signal
CIRCUIT DESCRIPTION
The speed sensor SP2 detects the rotation speed of the trans-
mission 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 park-
ing 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. If the speed sensor SP2 mal-
functions, the ECM uses input signals from the speed sensor
NT as a back-up signal.
DTC No.DTC Detection ConditionTrouble 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
MONITOR DESCRIPTION
The output speed sensor 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 and throttle position sensor.
If the ECM detects no signal from the output shaft speed sensor even while the vehicle is moving, it will con-
clude that is a malfunction of the output speed sensor. The ECM will illuminate the MIL and store the DTC.
MONITOR STRATEGY
Related DTCsP0722Speed sensor SP2/Verify pulse input
Required sensors/ComponentsSpeed sensor SP2
Frequency of operationContinuous
Duration500 output shaft revolution
MIL operationImmediate
Sequence of operationNone
DIB36-02

IN0253
WRONG CORRECT
IN0252
WRONG CORRECT IN-6
- INTRODUCTIONREPAIR INSTRUCTIONS
6 Author
: Date
:
2004 LAND CRUISER (RM1071U)
(k) Care must be taken when jacking up and supporting the
vehicle. Be sure to lift and support the vehicle at the prop-
er locations (See page IN-8).
Cancel the parking brake on the level place and
shift the transmission in N position.
When jacking up the front wheels of the vehicle at
first place stoppers behind the rear wheels.
When jacking up the rear wheels of the vehicle at
first place stoppers before the front wheels.
When either the front or rear wheels only should be
jacked up, set rigid racks and place stoppers in front
and behind the other wheels on the ground.
After the vehicle is jacked up, be sure to support it
on rigid racks. It is extremely dangerous to do any
work on a vehicle raised on a jack alone, even for
a small job that can be finished quickly.
(l) Observe the following precautions to avoid damage to the
following parts:
(1) Do not open the cover or case of the ECU unless
absolutely necessary. (If the IC terminals are
touched, the IC may be destroyed by static electric-
ity.)
(2) To disconnect vacuum hoses, pull off the end, not
the middle of the hose.
(3) To pull apart electrical connectors, pull on the con-
nector itself, not the wires.
(4) Be careful not to drop electrical components, such
as sensors or relays. If they are dropped on a hard
floor, they should be replaced and not reused.
(5) When steam cleaning an engine, protect the elec-
tronic components, air filter and emission-related
components from water.
(6) Never use an impact wrench to remove or install
temperature switches or temperature sensors.
(7) When checking continuity at the wire connector, in-
sert the tester probe carefully to prevent terminals
from bending.
(8) When using a vacuum gauge, never force the hose
onto a connector that is too large. Use a step-down
adapter for adjustment. Once the hose has been
stretched, it may leak air.

IN0253
WRONG CORRECT
IN0252
WRONG CORRECT IN-6
- INTRODUCTIONREPAIR INSTRUCTIONS
6 Author
: Date
:
2004 LAND CRUISER (RM1071U)
(k) Care must be taken when jacking up and supporting the
vehicle. Be sure to lift and support the vehicle at the prop-
er locations (See page IN-8).
Cancel the parking brake on the level place and
shift the transmission in N position.
When jacking up the front wheels of the vehicle at
first place stoppers behind the rear wheels.
When jacking up the rear wheels of the vehicle at
first place stoppers before the front wheels.
When either the front or rear wheels only should be
jacked up, set rigid racks and place stoppers in front
and behind the other wheels on the ground.
After the vehicle is jacked up, be sure to support it
on rigid racks. It is extremely dangerous to do any
work on a vehicle raised on a jack alone, even for
a small job that can be finished quickly.
(l) Observe the following precautions to avoid damage to the
following parts:
(1) Do not open the cover or case of the ECU unless
absolutely necessary. (If the IC terminals are
touched, the IC may be destroyed by static electric-
ity.)
(2) To disconnect vacuum hoses, pull off the end, not
the middle of the hose.
(3) To pull apart electrical connectors, pull on the con-
nector itself, not the wires.
(4) Be careful not to drop electrical components, such
as sensors or relays. If they are dropped on a hard
floor, they should be replaced and not reused.
(5) When steam cleaning an engine, protect the elec-
tronic components, air filter and emission-related
components from water.
(6) Never use an impact wrench to remove or install
temperature switches or temperature sensors.
(7) When checking continuity at the wire connector, in-
sert the tester probe carefully to prevent terminals
from bending.
(8) When using a vacuum gauge, never force the hose
onto a connector that is too large. Use a step-down
adapter for adjustment. Once the hose has been
stretched, it may leak air.