2003 LEXUS LS430 engine

Fig. 70: Identifying Waveform
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
WAVEFORM REFERENCE TABLE
MONITOR DESCRIPTION
This DTC indicates that pulse is not output from the speed sensor NT (Turbine (input) speed sensor) or is output
only little. The NT terminal of the ECM detects the revolving signal from speed sensor (NT) (input RPM). The
ECM outputs a gearshift signal comparing the input speed sensor (NT) with the output speed sensor (SP2).
While the vehicle is operating in the 4th, 5th or 6th gear position in the shift position of D, if the input shaft
revolution is less than 300 rpm*1 although the output shaft revolution is more than 300 rpm or more*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 approx. 50 km/h (31 mph) or more.
TerminalNT+ - NT-
Tool setting1V/DIV, 2ms/DIV
Vehicle conditionEngine idle speed (P or N position)

MONITOR STRATEGY
MONITOR STRATEGY TABLE
TYPICAL ENABLING CONDITIONS
TYPICAL ENABLING CONDITIONS TABLE
TYPICAL MALFUNCTION THRESHOLDS
TYPICAL MALFUNCTION THRESHOLDS TABLE
COMPONENT OPERATING RANGE
COMPONENT OPERATING RANGE TABLE
WIRING DIAGRAM
Related DTCsP0717: Speed sensor (NT)/Verify pulse input
Required sensors/ComponentsSpeed sensor (NT)
Frequency of operationContinuous
Duration5 sec.
MIL operationImmediate
Sequence of operationNone
The monitor will run whenever this DTC is not
present.See LIST OF DISABLE A MONITOR
Shift changeShift change is completed and before starting next
shift change operation
ECM selected gear4th, 5th or 6th
Output shaft rpm1,000 rpm or more
NSW switchOFF
R switchOFF
EngineRunning
Sensor signal rpmLess than 300 rpm
Speed sensor (NT)Input speed is equal to engine speed when lock-up
ON.

Fig. 71: DTC P0717 - Wiring Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
INSPECTION PROCEDURE
HINT:
According to the DATA LIST displayed by the 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 hand-held tester together with the CAN VIM (controller area network vehicle interface
module) to the DLC3.
d. Turn the ignition switch to the ON position.
e. Push the "ON" button of the hand-held tester.
f. Select the item "DIAGNOSIS/ENHANCED OBD II/DATA LIST".
g. According to the display on tester, read the "DATA LIST".
Fig. 72: Test Item Reference Chart

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
HINT:

Standard (Check for short):
Fig. 76: Tester Connection Reference Chart

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NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (See ELECTRONIC CIRCUIT
INSPECTION PROCEDURE )
OK: REPLACE ECM (See REPLACEMENT
)
DTC P0724: BRAKE SWITCH "B" CIRCUIT HIGH
CIRCUIT DESCRIPTION
The purpose of this circuit is to prevent the engine from stalling while driving in lock-up condition, when
brakes are suddenly applied.
When the brake pedal is depressed, this switch sends a signal to the ECM. Then the ECM cancels the operation
of the lock-up clutch while braking is in progress.
Fig. 77: DTC Reference Chart

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
MONITOR DESCRIPTION
This DTC indicates that the stop light switch remains on. When the stop light switch remains ON during "stop
and go" driving, the ECM interprets this as a fault in the stop light switch and the MIL comes on and the ECM
stores the DTC. The vehicle must stop (less than 3 km/h (2 mph)) and go (30 km/h (19 mph) or more) 5 times
for two driving cycles in order to detect malfunction.
MONITOR STRATEGY
MONITOR STRATEGY TABLE

TYPICAL ENABLING CONDITIONS
The following items are common to all conditions below.
TYPICAL ENABLING CONDITIONS TABLE
Condition (A)
TYPICAL ENABLING CONDITIONS TABLE - A
Condition (B)
TYPICAL ENABLING CONDITIONS TABLE - B
TYPICAL MALFUNCTION THRESHOLDS
MIL operation2 driving cycles
Sequence of operationNone
The monitor will run whenever this DTC is not
present.See LIST OF DISABLE A MONITOR
Turbine speed sensor circuitNot circuit malfunction
Output speed sensor circuitNot circuit malfunction
Shift solenoid valve S1 circuitNot circuit malfunction
Shift solenoid valve S2 circuitNot circuit malfunction
Shift solenoid valve S3 circuitNot circuit malfunction
Shift solenoid valve S4 circuitNot circuit malfunction
Shift solenoid valve SR circuitNot circuit malfunction
Shift solenoid valve SL1 circuitNot circuit malfunction
Shift solenoid valve SL2 circuitNot circuit malfunction
ECT (Engine coolant temperature) sensor circuitNot circuit malfunction
KCS sensor circuitNot circuit malfunction
ETCS (Electric throttle control system)Not system down
Transmission range"D"
ECT40°C (104°F) or more
Spark advance from Max. retard timing by KCS
control0° CA or more
EngineStarting
ECM selected gear5th
Vehicle speed2 km/h (1.2 mph) or more
Throttle valve opening angle6.5% or more (Varies with engine speed)
ECM selected gear6th
Vehicle speed2 km/h (1.2 mph) or more
Throttle valve opening angle6.5ohms or more (Varies with engine speed)

a. Warm up the engine.
b. Turn the ignition switch off.
c. Connect the hand-held tester together with the CAN VIM (controller area network vehicle interface
module) to the DLC3.
d. Turn the ignition switch to the ON position.
e. Push the "ON" button of the hand-held tester.
f. Clear the DTC.
g. Select the item "DIAGNOSIS/ENHANCED OBD II/ACTIVE TEST/SHIFT".
h. According to the display on tester, perform the "ACTIVE TEST".
HINT:
While driving, the shift position can be forcibly changed with the hand-held tester.
Comparing the shift position commanded by the ACTIVE TEST with the actual shift position enables
you to confirm the problem (see FAIL
-SAFE CHART ).
Fig. 87: Test Item Reference Chart

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
HINT:
This test can be conducted when the vehicle speed is 50 km/h (31 mph) or less.
The 4th to 5th and 5th to 6th up-shiftings must be performed with the accelerator pedal released.
The 6th to 5th and 5th to 4th down-shiftings must be performed with the accelerator pedal released.
Do not operate the accelerator pedal for at least 2 seconds after shifting and do not shift
successively.
The shift position commanded by the ECM is shown in the DATA LIST/SHIFT display on the
hand-held tester.
Gear positions in the event of a solenoid valve mechanical problem:
GEARSHIFT SPECIFICATION TABLE
Tester
command 1st2nd3rd4th5th6th

OFF malfunction (A)
TYPICAL ENABLING CONDITIONS TABLE - OFF MALFUNCTION A
OFF malfunction (B)
TYPICAL ENABLING CONDITIONS TABLE - OFF MALFUNCTION B
OFF malfunction (C)
TYPICAL ENABLING CONDITIONS TABLE - OFF MALFUNCTION C
Turbine speed sensor circuitNot circuit malfunction
Output speed sensor circuitNot circuit malfunction
Shift solenoid valve S1 circuitNot circuit malfunction
Shift solenoid valve S2 circuitNot circuit malfunction
Shift solenoid valve S3 circuitNot circuit malfunction
Shift solenoid valve S4 circuitNot circuit malfunction
Shift solenoid valve SR circuitNot circuit malfunction
Shift solenoid valve SL1 circuitNot circuit malfunction
Shift solenoid valve SL2 circuitNot circuit malfunction
ECT (Engine coolant temperature) sensor circuitNot circuit malfunction
KCS sensor circuitNot circuit malfunction
ETCS (Electric throttle control system)Not system down
Transmission range"D"
ECT40°C (104°F) or more
Spark advance from Max. retard timing by KCS
control0° CA or more
EngineStarting
ECM selected gear5th
Vehicle speed2 km/h (1.2 mph) or more
Throttle valve opening angle6.5% or more at 2,000 rpm (Conditions vary with
engine speed)
ECM selected gear2nd
Vehicle speed2 km/h (1.2 mph) or more
Output speed2nd --> 1st down shift point or more
Throttle valve opening angle6.5% or more at 2,000 rpm (Conditions vary with
engine speed)
Current ECM selected gear6th
Last ECM selected gear5th
Vehicle speed (During transition from 5th to 6th
gear)Less than 100 km/h (62.2 mph)

OFF malfunction (D)
TYPICAL ENABLING CONDITIONS TABLE - OFF MALFUNCTION D
ON malfunction (A)
TYPICAL ENABLING CONDITIONS TABLE - ON MALFUNCTION A
ON malfunction (B)
TYPICAL ENABLING CONDITIONS TABLE - ON MALFUNCTION B
TYPICAL MALFUNCTION THRESHOLDS
[OFF malfunction]
Both of the following conditions are met:
OFF malfunction (A)
OFF malfunction (B), (C) or (D)
OFF malfunction (A)
TYPICAL MALFUNCTION THRESHOLDS TABLE - OFF MALFUNCTION A
OFF malfunction (B)
TYPICAL MALFUNCTION THRESHOLDS TABLE - OFF MALFUNCTION B
ECM selected gear6th
Engine speed-Turbine speed (NE-NT) (After
transition from 5th to 6th gear)Less than 150 rpm
Vehicle speedLess than 100 km/h (62.2 mph)
ECM selected gear1st
Vehicle speed2 km/h (1.2 mph) or more and Less than 40 km/h
(24.9 mph)
Engine speed-Turbine speed (NE-NT)50 rpm or more
ECM selected gear5th
Vehicle speed2 km/h (1.2 mph) or more
Throttle valve opening angle6.5% or more at 2,000 rpm (Conditions vary with
engine speed)
Turbine speed/Output speed (NT/NO)0.66 or more and 0.80 or less (This means actual
gear is 5th)
Turbine speed/Output speed (NT/NO)3.08 or more and 7.50 or less (This means actual
gear is 1st)