Inspection Procedure

WARNING: This page is about a different car, the 2004 Lexus ES 330. However, it is still accessible from the selected car via links, so may be relevant.

HINT:

Forming 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.

Warm up the engine.
Turn the ignition switch off.
Connect the hand-held tester to the DLC3.
Turn the ignition switch to the ON position.
Push the "ON" button of the hand-held tester.
When you use hand-held tester:
Select the item "DIAGNOSIS/ENHANCED OBD II/ACTIVE TEST".
According to the display on tester, perform the "ACTIVE TEST".

Fig 1: Diagnostic Chart
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

HINT:

This test can be conducted when the vehicle speed is 60 km/h (37 mph) or more.
This test can be conducted with the 5th gear.
Lightly depress the accelerator pedal and check that the engine speed does not change abruptly.

HINT:

When changing the accelerator pedal opening angle while driving, if the engine speed does not change, lock-up is on.
Slowly release, but not fully, the accelerator pedal in order to decelerate. (Fully releasing the pedal will close the throttle valve and lock-up may be turned off.)

Fig 2: Identifying Position Of Accelerator Pedal
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

CHECK OTHER DTCS OUTPUT (IN ADDITION TO DTC P0741)
1. Connect the OBD II scan tool or the hand-held tester to the DLC3.
2. Turn the ignition switch to the ON position and push the OBD II scan tool or the hand-held tester main switch ON.
3. When you use hand-held tester:
  Select the item "DIAGNOSIS/ENHANCED OBD II/DTC INFO/CURRENT CODES".
4. Read the DTCs using the OBD II scan tool or the hand-held tester.
  Result:
  
  Fig 3: Display (DTC Output) Chart
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
HINT:

If any other codes besides "P0741" is output, perform the troubleshooting for those DTCs first.

B: GO TO RELEVANT DTC CHART (SEE DIAGNOSTIC TROUBLE CODE CHART )

A: Go to next step.
INSPECT TRANSMISSION WIRE (DSL)
1. Disconnect the transmission wire connector from the transaxle.
2. Measure the resistance according to the value(s) in t figure Fig 4 below.
  Standard
  
  Fig 4: Identifying Tester Connection Specified Condition Chart
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Fig 5: Measuring Resistance
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: Go to step 4

OK: Go to next step.
CHECK HARNESS AND CONNECTOR (TRANSMISSION WIRE - ECM)
1. Connect the transmission wire connector.
2. Disconnect the ECM connector.
3. Measure the resistance according to the value(s) in the figure Fig 6 below.
  Standard
  
  Fig 6: Identifying Tester Connection Specified Condition Chart
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Fig 7: Measuring Resistance
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (SEE ELECTRONIC CIRCUIT INSPECTION PROCEDURE )

OK: Go to next step.
INSPECT SHIFT SOLENOID VALVE (DSL)
1. Remove the shift solenoid valve DSL.
2. Measure the resistance according to the value(s) in the figure Fig 8 below.
  Standard
  
  Fig 8: Identifying Tester Connection Specified Condition Chart
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Fig 9: Measuring Resistance
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Connect positive (+) lead to the terminal of solenoid connector, negative (-) lead to the solenoid body.
  Standard:
  
  The solenoid valve makes an operating noise.
NG: REPLACE SHIFT SOLENOID VALVE (DSL)

OK: Go to next step.
CHECK TRANSMISSION WIRE (SEE ELECTRONIC CIRCUIT INSPECTION PROCEDURE )
NG: REPAIR OR REPLACE TRANSMISSION WIRE (SEE TRANSMISSION WIRE (U151E) )

OK: Go to next step.
INSPECT TRANSMISSION VALVE BODY ASSY (See chapter 2 in the problem symptoms table) (SEE PROBLEM SYMPTOMS TABLE )
NG: REPAIR OR REPLACE TRANSMISSION VALVE BODY ASSY (SEE TRANSMISSION VALVE BODY ASSY (U151E) )

OK: Go to next step.
INSPECT TORQUE CONVERTER CLUTCH ASSY (SEE TORQUE CONVERTER CLUTCH AND DRIVE PLATE )
NG: REPLACE TORQUE CONVERTER CLUTCH ASSY

OK: REPAIR AUTOMATIC TRANSAXLE ASSY (SEE AUTOMATIC TRANSAXLE ASSY (U151E) )