LEXUS LS430 2003 Factory Repair Manual

It is not necessary to inspect the circuit when P0711 is set.
1.CHECK OTHER DTCS OUTPUT (IN ADDITION TO DTC P0711)
a. Connect the hand-held tester to the DLC3.
b. Turn the ignition switch to the ON position and push the hand-held tester main switch ON.
c. Select the item "DIAGNOSIS/ENHANCED OBD II/DTC INFO/CURRENT CODES".
d. Read the DTCs using the hand-held tester.
Result:
DTC OUTPUT RESULT TABLE
HINT:
If any other codes besides "P0711" are output, perform troubleshooting for those DTCs first.
B: GO TO RELEVANT DTC CHART (See DIAGNOSTIC TROUBLE CODE CHART
)
A: Go to next step
2.CHECK TRANSMISSION FLUID LEVEL (See ADJUSTMENT
- AUTOMATIC
TRANSMISSION FLUID )
OK:
Automatic transmission fluid level is correct.
NG: ADD FLUID
OK: REPLACE TRANSMISSION WIRE (See step 5 on REPLACEMENT
)
DTC P0717: TURBINE SPEED SENSOR CIRCUIT NO SIGNAL
CIRCUIT DESCRIPTION
This sensor detects the rotation speed of the turbine which shows the input revolution of transmission. By
comparing the input turbine speed signal (NT) with the counter gear speed sensor signal (SP2), the ECM detects
the shift timing of the gears and appropriately controls the engine torque and hydraulic pressure according to
various conditions. Thus, providin
g smooth gear shift.
Display (DTC output)Proceed to
Only "P0711" is outputA
"P0711" and other DTCsB

Fig. 68: Identifying Turbine Speed Sensor Components
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
Fig. 69: DTC Reference Chart

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
Reference (Using an oscilloscope):
Check the waveform between the terminals NT+ and NT- of the ECM connector.
Standard: Refer to the illustration.

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:

SPD (NT) is always 0 while driving:
Open or short in the sensor or circuit.
SPD (NT) 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
a. Check the speed sensor (NT) installation.
OK:
The installation bolt is tightened properly and there is no clearance between the sensor and
transmission case.
Fig. 73: Checking Speed Sensor

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
NG: REPLACE SPEED SENSOR (NT)

OK: Go to next step
2.INSPECT SPEED SENSOR (NT)
a. Disconnect the speed sensor connector from the transmission.
b. Measure the resistance according to the value(s) in the table below.
Fig. 74: Inspecting Speed Sensor (NT)

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
Standard:
SPEED SENSOR (NT) - RESISTANCE TABLE
Tester ConnectionSpecified Condition 20°C (68°F)

NG: REPLACE SPEED SENSOR (NT)
OK: Go to next step
3.CHECK HARNESS AND CONNECTOR (SPEED SENSOR - ECM)
a. Connect the speed sensor connector.
b. Disconnect the ECM connector.
c. Measure the resistance according to the value(s) in the table below.
Standard:
SPEED SENSOR - ECM - RESISTANCE TABLE
d. Measure the resistance according to the value(s) in the table below.
Fig. 75: Disconnecting ECM Connector

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
1 - 2560 to 680 ohms
Tester ConnectionSpecified Condition 20°C (68°F)
E6 - 21 (NT+) - E6 - 20 (NT-)560 to 680 ohms

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

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
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 stop light switch remains on during GO and STOP 10 times.
GO and STOP is defined as follows;
TYPICAL ENABLING CONDITIONS TABLE
TYPICAL MALFUNCTION THRESHOLDS
TYPICAL MALFUNCTION THRESHOLDS TABLE
WIRING DIAGRAM
See DTC P0504, P0571: BRAKE SWITCH "A"/"B" CORRELATION, BRAKE SWITCH "A"
CIRCUIT .
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. Turn the ignition switch off.
b. Connect the hand-held tester together with the CAN VIM (controller area network vehicle interface
module) to the DLC3.
Related DTCsP0724: Stop light switch/Range check/Rationality
Required sensors/ComponentsStop light switch
Frequency of operationContinuous
DurationGO and STOP 5 times
MIL operation2 driving cycles
Sequence of operationNone
The monitor will run whenever this DTC is not
present.See LIST OF DISABLE A MONITOR
GO: (Vehicle speed is 30 km/h (18.63 mph) or
more)Once
STOP: (Vehicle speed is Less than 3 km/h (1.86
mph))Once
StarterOFF
Battery voltage8 V or more
Ignition switchON
Brake switchRemain ON during GO and STOP 5 times.