2003 LEXUS LS430 ignition

1.CHECK OTHER DTCS OUTPUT (IN ADDITION TO DTC P0751)
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 "P0751" 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.INSPECT SHIFT SOLENOID VALVE (S1)
a. Remove the shift solenoid valve S1.
b. Measure the resistance according to the value(s) in the table below.
Standard:
SHIFT SOLENOID VALVE (S1) - RESISTANCE TABLE
c. Connect positive (+) lead to the terminal of solenoid connector, negative (-) lead to the solenoid
body.
OK:
The solenoid makes an operating noise.
Display (DTC output)Proceed to
Only "P0751" is outputA
"P0751" and other DTCsB
Tester ConnectionSpecified Condition 20°C (68°F)
Solenoid Connector (S1) - Solenoid Body (S1)11 to 15ohms

[OFF malfunction]
Both of the following conditions are met: OFF malfunctions (A) and (B)
OFF malfunction (A)
TYPICAL MALFUNCTION THRESHOLDS TABLE - OFF MALFUNCTION A
OFF malfunction (B)
TYPICAL MALFUNCTION THRESHOLDS TABLE - OFF MALFUNCTION B
[ON malfunction]
Both of the following conditions are met: ON malfunctions (A) and (B)
ON malfunction (A)
TYPICAL MALFUNCTION THRESHOLDS TABLE - ON MALFUNCTION A
ON malfunction (B)
TYPICAL MALFUNCTION THRESHOLDS TABLE - ON MALFUNCTION B
INSPECTION PROCEDURE
HINT:
Performing the ACTIVE TEST using the hand-held tester allows the relay, VSV, actuator and so on to operate
without parts removal. Performing the ACTIVE TEST as the first step of troubleshooting is one method to
shorten labor time.
It is possible to display the DATA LIST during the ACTIVE TEST.
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.
Turbine speed/Output speed (NT/NO)1.23 or more and 1.48 or less (This means actual
gear is 3rd)
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)0.50 or more and 0.64 or less (This means actual
gear is 6th)
Turbine speed/Output speed (NT/NO)0.50 or more and 0.64 or less (This means actual
gear is 6th)

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. 103: 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.
<0037004b004800030056004b004c00490057000300560052004f004800510052004c0047000300590044004f005900480003003600150003004c00560003005700580055005100480047000300520051001200520049004900030051005200550050004400
4f004f005c0003005a004b0048005100030057004b00480003[shift lever is in the D position:
GEARSHIFT SPECIFICATION TABLE
1.CHECK OTHER DTCS OUTPUT (IN ADDITION TO DTC P0756)
ECM
command
gearshift
1st2nd3rd4th5th6th
Shift solenoid
valve S2ONONOFFOFFOFFON

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 "P0756" 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.INSPECT SHIFT SOLENOID VALVE (S2)
a. Remove the shift solenoid valve S2.
b. Measure the resistance according to the value(s) in the table below.
Display (DTC output)Proceed to
Only "P0756" is outputA
"P0756" and other DTCsB

TYPICAL MALFUNCTION THRESHOLDS TABLE - OFF MALFUNCTION A
OFF malfunction (B)
TYPICAL MALFUNCTION THRESHOLDS TABLE - OFF MALFUNCTION B
[ON malfunction]
One of the following conditions is met: ON malfunctions (A), (B) and (C)
ON malfunction (A)
TYPICAL MALFUNCTION THRESHOLDS TABLE - ON MALFUNCTION A
ON malfunction (B)
TYPICAL MALFUNCTION THRESHOLDS TABLE - ON MALFUNCTION B
ON malfunction (C)
TYPICAL MALFUNCTION THRESHOLDS TABLE - ON MALFUNCTION C
INSPECTION PROCEDURE
HINT:
Performing the ACTIVE TEST using the hand-held tester allows the relay, VSV, actuator and so on to operate
without parts removal. Performing the ACTIVE TEST as the first step of troubleshooting is one method to
shorten labor time.
It is possible to display the DATA LIST during the ACTIVE TEST.
a. Warm up the engine.
b. Turn the ignition switch off.
c. Connect the han
d-held tester together with the CAN VIM (controller area network vehicle interface
Turbine speed/Output speed (NT/NO)0.93 or more and 1.07 or less (This means actual
gear is 3rd)
Turbine speed/Output speed (NT/NO)0.50 or more and 0.64 or less (This means actual
gear is 6th)
Turbine speed/Output speed (NT/NO)1.23 or more and 1.48 or less (This means actual
gear is 3rd)
Turbine speed - Output speed x 4th gear ratio (NT-
NO x 4th gear ratio)1,000 rpm or more
Turbine speed - Output speed x 5th gear ratio (NT-
NO x 5th gear ratio)1,000 rpm or more

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. 109: 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.
<0037004b004800030056004b004c00490057000300560052004f004800510052004c0047000300590044004f005900480003003600160003004c00560003005700580055005100480047000300520051001200520049004900030051005200550050004400
4f004f005c0003005a004b0048005100030057004b00480003[shift lever is in the D position:
GEARSHIFT SPECIFICATION TABLE
ECM
command
gearshift
1st2nd3rd4th5th6th
Shift solenoid
valve S3ONONONOFFOFFOFF

1.CHECK OTHER DTCS OUTPUT (IN ADDITION TO DTC P0761)
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 "P0761" 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.PERFORM ACTIVE TEST BY HAND - HELD TESTER
SST 09992-00095 (09992-00231, 09992-00271)
HINT:
Performing the intelligent tester's ACTIVE TEST allows relay, VSV, actuator and other items to be
operated without removing any parts. Performing the ACTIVE TEST early in troubleshooting is one way
to save time. The DATA LIST can be displayed during the ACTIVE TEST.
a. Remove the test plu
g on the transmission case center right side and connect SST.
Display (DTC output)Proceed to
Only "P0761" is outputA
"P0761" and other DTCsB

OFF malfunction (B)
TYPICAL MALFUNCTION THRESHOLDS TABLE - OFF MALFUNCTION B
INSPECTION PROCEDURE
HINT:
Performing the ACTIVE TEST using the hand-held tester allows the relay, VSV, actuator and so on to operate
without parts removal. Performing the ACTIVE TEST as the first step of troubleshooting is one method to
shorten labor time.
It is possible to display the DATA LIST during the ACTIVE TEST
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).
Turbine speed/Output speed (NT/NO)<00130011001c00160003005200550003005000520055004800030044005100470003002f00480056005600030057004b004400510003001400110013001a0003000b0037004b004c0056000300500048004400510056000300440046005700580044004f00
03[
gear is 4th)
Turbine speed/Output speed (NT/NO)<00130011001c00160003005200550003005000520055004800030044005100470003002f00480056005600030057004b004400510003001400110013001a0003000b0037004b004c0056000300500048004400510056000300440046005700580044004f00
03[
gear is 4th)