Automatic Transmission (U880F) (Diagnostics - Introduction): Other Lexus RX III рестайлинг

PRECAUTION [07/2012 - ]

Note. When disconnecting the cable from the negative (-) battery terminal, initialize the following system(s) after the cable is reconnected: System Name See Procedure Parking Assist Monitor System Refer to INITIALIZATION [07/2012 - ] Back Door Closer System Power Back Door System

1. PROCEDURES NECESSARY WHEN ECU OR OTHER PARTS ARE REPLACED NOTE: If any parts are replaced, perform the following as necessary referring to the table below. Replaced Part Reset Memory*1 Transaxle Compensation Code Learning by Driving (Road Test) Automatic Transaxle Assembly -*2 Input*3 Perform Shift solenoid valve SL1 and SL2 - - Perform Valve body assembly Shift solenoid valve SL3, SL4 and SL5 - Initialize Perform TCM (If possible, read the transaxle compensation code from the previous TCM) Possible - Input (Into the new TCM)*4 Perform Impossible - Initialize*5 Perform Engine assembly ECM Reset - Perform HINT: *1: Reset Memory cannot be completed by only disconnecting and reconnecting the cable to the negative (-) battery terminal. *2: When "Set Transaxle Compensation Code" is performed, "Reset Memory" is automatically completed. *3: Set the compensation code for the new automatic transaxle. *4: Read the compensation code from the previous TCM, then transfer it to the new TCM. *5: Set the transaxle compensation code of the current automatic transaxle. Registration of the transaxle compensation code. Refer to «REGISTRATION [07/2012 - ]»(ref-602573-S20946371132014030500000) . Learning by driving (Road Test). Refer to «INITIALIZATION [07/2012 - ]»(ref-602573-S18429846892014030500000) . Reset Memory. Refer to «INITIALIZATION [07/2012 - ]»(ref-602573-S18429846892014030500000) .
2. HANDLING PRECAUTIONS WARNING: When using compressed air, always aim away from yourself to prevent Automatic Transmission Fluid (ATF) or kerosene from spraying on your face. NOTE: The automatic transaxle is composed of precision-made parts, necessitating careful inspection before reassembly because even a small nick could cause fluid leakage or affect performance. The procedures are organized so that you work on only one component group at a time. This will help avoid confusion with similar-looking parts of different sub-assemblies being on your workbench at the same time. The component groups are inspected and repaired from the converter housing side. Whenever possible, complete the inspection, repair and reassembly before proceeding to the next component group. If a defect is found in a certain component group during reassembly, inspect and repair this group immediately. If a component group cannot be assembled because parts are being ordered, be sure to keep all parts of the group in a separate container while proceeding with disassembly, inspection, repair and reassembly of other component groups. Use of Toyota Genuine ATF WS is recommended. All disassembled parts should be washed clean, and compressed air should be blown through any fluid passages and holes. Dry all parts with compressed air. Never use cloth. The recommended ATF or kerosene should be used for cleaning. After cleaning, the parts should be arranged in the order they were removed for efficient inspection, repairs, and reassembly. New discs for the brakes and clutches that will be used for replacement must be soaked in ATF for at least 15 minutes before reassembly. All oil seal rings, clutch discs, clutch plates, rotating parts, and sliding surfaces should be coated with ATF prior to reassembly. All old gaskets rubber O-rings must be replaced. Do not apply adhesive cement to gaskets similar parts. Make sure that the ends of the snap rings are not aligned with any cutouts. Also make sure that snap rings are correctly installed into the grooves. If a worn bushing is to be replaced, the sub-assembly containing the bushing must also be replaced. Check the thrust bearings and races for wear or damage. Replace them if necessary. Use petroleum jelly to keep parts in place. When working with FIPG material, the following must be observed: Using a razor blade and a gasket scraper, remove all the old packing (FIPG) material from the gasket surface. Thoroughly clean all components to remove any loose material. Clean both sealing surfaces with a non-residue solvent. Parts must be reassembled within 10 minutes of application. Otherwise, the packing (FIPG) material must be removed and reapplied.

DEFINITION OF TERMS [07/2012 - ]

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SYSTEM DIAGRAM [07/2012 - ]

The configuration of the electronic control system in the U880F automatic transaxle is as shown in the following chart.

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MECHANICAL SYSTEM TESTS [07/2012 - ]

1. STALL SPEED TEST HINT: This test is to check the overall performance of the engine and transaxle. WARNING: The driving test should be done on a paved surface (a surface that is not slippery). To ensure safety, perform this test in an open and level area that provides good traction. The stall speed test should always be performed with at least 2 people. One person should observe the condition of the wheels and wheel chocks while the other is performing the test. NOTE: Do not perform the stall speed test for longer than 5 seconds. Connect the Techstream to the DLC3. Run the vehicle until the transmission fluid temperature has reached 50 to 80°C (122 to 176°F). Allow the engine to idle with the air conditioning and headlights off. Chock all 4 wheels. Set the parking brake and keep the brake pedal depressed firmly with your left foot. Move the shift lever to D. Depress the accelerator pedal as much as possible with your right foot. Read the engine speed (stall speed) and release the accelerator pedal immediately. Standard value Stall Speed 2345 rpm +200 rpm -430 rpm EVALUATION Test Result Possible Cause Stall speed is lower than standard value Engine power output may be insufficient Stator one-way clutch is not operating properly HINT: If the value is less than the specified value by 600 rpm or more, the torque converter could be faulty. Stall speed is higher than standard value Line pressure is too low No. 1 clutch (C1) slipping No. 1 one-way clutch (F1) is not operating properly Improper fluid level
2. SHIFT TIME LAG TEST HINT: When the shift lever is moved while the engine is idling, there will be a certain time lapse or lag before the shock can be felt. This is used for checking the condition of the clutch and brake. Connect the Techstream to the DLC3. Run the vehicle until the transmission fluid temperature has reached 50 to 80°C (122 to 176°F). Allow the engine to idle with the air conditioning off. Set the parking brake and keep the brake pedal depressed firmly. Check the D position time lag. Move the shift lever to N and wait for 1 minute. Move the shift lever to D and measure the time until the shock is felt. Repeat the 2 steps above 3 times, and calculate the average time of the 3 tests. Check the R position time lag. Move the shift lever to N and wait for 1 minute. Move the shift lever to R and measure the time until the shock is felt. Repeat the 2 steps above 3 times, and calculate the average time of the 3 tests. Standard value D position time lag is less than 1.2 seconds R position time lag is less than 1.5 seconds EVALUATION (IF N TO D OR N TO R TIME LAG IS LONGER THAN THE SPECIFIED TIME) Test Result Possible Cause D position time lag exceeds standard value Line pressure is too low No. 1 clutch (C1) is worn No. 1 one-way clutch (F1) is not operating properly R position time lag exceeds standard value Line pressure is too low No. 3 clutch (C3) is worn No. 2 brake (B2) is worn

Scheme 62

1. PERFORM HYDRAULIC TEST Measure the line pressure. WARNING: The line pressure test should always be carried out with at least 2 people. One person should observe the condition of wheels and wheel chocks while the other is performing the test. NOTE: Perform the test at the normal operating Automatic Transmission Fluid (ATF) temperature: 50 to 80°C (122 to 176°F) Be careful to prevent the SST hose from interfering with the exhaust pipe. This check must be conducted after checking and confirming that the engine is normal. Perform the test with the A/C off. Do not perform the stall test for longer than 5 seconds. Warm up the Automatic Transmission Fluid (ATF). Lift the vehicle up. Remove the engine under cover. Remove the test plug A on the transaxle case front side and install the SST. SST: 09992-00095 09992-00231 09992-00271 NOTE: There is a difference in installation point between D position and R position. Lower the vehicle. Fully apply the parking brake and chock the 4 wheels. Start the engine and check the idle speed. Keep your left foot firmly on the brake pedal and move the shift lever to D. Measure the line pressure while the engine is idling. Depress the accelerator pedal as much as possible with your right foot. Quickly read the highest line pressure reading when the engine speed reaches stall speed. SPECIFIED LINE PRESSURE Condition D Position kPa (kgf/cm 2 , psi) Idling 420 to 510 kPa (4.3 to 5.2 kgf/cm 2 , 61 to 74 psi) Stall test 1560 to 1750 kPa (15.9 to 17.8 kgf/cm 2 , 226 to 254 psi) Turn the engine switch off. Remove the SST and install the test plug A. Remove the test plug B on the transaxle case front left side and install the SST. SST: 09992-00095 09992-00231 09992-00271 Firmly depress the brake pedal, move the shift lever to R and check that the line pressure while the engine is idling and during the stall test. SPECIFIED LINE PRESSURE Condition R Position kPa (kgf/cm 2 , psi) Idling 560 to 670 kPa (5.7 to 6.8 kgf/cm 2 , 81 to 97 psi) Stall test 1750 to 2050 kPa (17.8 to 20.9 kgf/cm 2 , 254 to 297 psi) Turn the engine switch off. Remove the SST and install the test plug B. Clear the DTCs. EVALUATION Test Result Possible Cause Measured values are higher than the specified value in all positions Shift solenoid valve (SLT) defective Regulator valve defective Measured values are lower than the specified value in all positions Shift solenoid valve (SLT) defective Regulator valve defective Oil pump defective Pressure is low in D only D position circuit fluid leak No. 1 clutch (C1) defective Pressure is low in R only R position circuit fluid leak No. 3 clutch (C3) defective No. 2 brake (B2) defective

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1. PERFORM MANUAL SHIFTING TEST HINT: Using this test, it can be determined whether a problem is in an electrical circuit or if it is a mechanical problem in the transaxle. If any abnormalities are found in the following test, the problem is in the transaxle itself. Disconnect the connector of the transmission wire. HINT: It is possible to deactivate the electrical shift control by disconnecting the transmission wire. The gears can then be changed mechanically with the shift lever. Drive with the transmission wire disconnected. Move the shift lever to each position to check whether the gear changes as shown in the table below. Shift Lever Position Gear P P R R D 3rd No Shift (Gears will not change) Connect the connector of the transmission wire. Clear the DTCs. Refer to «DTC CHECK / CLEAR [07/2012 - ]»(ref-602573-S12322516782014030500000) .

REGISTRATION [07/2012 - ]

Note. When the automatic transaxle is replaced, the transaxle compensation code must be input into the TCM (proceed to Procedure 1). After the automatic transaxle is reinstalled, the Quick Response (QR) code label will be positioned where the code cannot be read. Therefore, before reinstalling the automatic transaxle, record the transaxle compensation code or input it into the Techstream. When the TCM is replaced, the existing transaxle compensation codes must be input into the new TCM (proceed to Procedure 2).

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1. INPUT TRANSAXLE COMPENSATION CODE INTO TCM (Procedure 1) NOTE: Transaxle compensation codes are unique, 60-digit alphanumeric values printed on a QR label on the transaxle. If an incorrect transaxle compensation code is input into the TCM, shift shock may occur. Record the transaxle compensation code specified on the QR label. TEXT IN ILLUSTRATION *1 QR Code Label *2 Transaxle Compensation Code HINT: The transaxle compensation code is printed on the QR label. Move the shift lever to N or P. Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. NOTE: Do not start the engine. Enter the following menus: Powertrain / ECT / Utility / A/T Code Registration. Select "Set Compensation Code". Register the compensation code. Press "Input". Manually input the transaxle compensation code. The code is a 60-digit alphanumeric value printed on the QR label. After inputting the code, press "OK". Check that the compensation code displayed on the screen is correct by comparing it with the 60-digit alphanumeric value on the QR label. NOTE: If an incorrect transaxle compensation code is input into the TCM, shift shock will occur. Press "NEXT" to set the compensation code to the TCM. HINT: If the registration process fails, the compensation code may be incorrect. Check the compensation code again. If the registration process fails and the attempted compensation code is correct, a problem with the wire harness or a bad connection with the DLC3 may cause a registration failure. Check the wire harness and the DLC3 connection. If no problem is found, the TCM may be malfunctioning. Check the TCM and repeat this operation. Press "EXIT".
2. TRANSFER TRANSAXLE COMPENSATION CODE (Procedure 2) NOTE: Transaxle compensation codes are 60-digit alphanumeric values imprinted on a QR label on the transaxle. If an incorrect transaxle compensation code is input into the TCM, shift shock may occur. HINT: The following operation is available for use with TCMs that can transmit the registered transaxle compensation code to Techstream. Move the shift lever to N or P. Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. NOTE: Do not start the engine. HINT: The transaxle compensation code is printed on the QR label. Read the transaxle compensation code. Enter the following menus: Powertrain / ECT / Utility / A/T Code Registration. Select "Read Compensation Code". Press "Save". Press "Overwrite". NOTE: Do not use the code specified on the transaxle QR label even if the transaxle compensation code cannot be read using the Techstream. The code printed on an in-service transaxle may not match its current characteristics. Replace the TCM with a new one and perform a road test to allow the TCM to learn. Press "EXIT". Turn the engine switch off. Replace the TCM. Set the transaxle compensation code. Turn the engine switch on (IG). Turn the Techstream on. Enter the following menus: Powertrain / ECT / Utility / A/T Code Registration. Select "Set Compensation Code". Press "Open". Press "Open" again to proceed. Press "Exit".

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1. RESET TRANSAXLE COMPENSATION CODE NOTE: If the following parts have been replaced, initialize the TCM and perform the following "Reset Memory" and "Perform Road Test to Allow TCM to learn" steps. Replaced Part TCM Valve body assembly Shift solenoid valve SL3 Shift solenoid valve SL4 Shift solenoid valve SL5 The transaxle compensation code can only be initialized with the Techstream. HINT: The TCM memorizes the condition that the ECT controls the automatic transaxle assembly according to those characteristics. Therefore, when the automatic transaxle assembly, or TCM has been replaced, it is necessary to reset the memory so that the TCM can memorize the new information. Reset procedure is as follows: Move the shift lever to N or P. Turn the engine switch off. Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Enter the following menus: Powertrain / ECT / Utility / A/T Code Reset. Press "Next" again to proceed. NOTE: After the transaxle compensation code is initialized, perform the following "Reset Memory" and "Perform Road Test to Allow TCM to learn" steps. Press "Exit".
2. PERFORM ROAD TEST TO ALLOW TCM TO LEARN WARNING: Perform the following procedures while strictly observing all traffic laws and speed limits. Do not accelerate or decelerate rapidly. "Road test" procedure is as follows: Warm up the engine. According to the replaced parts, perform the road test shown below. Replaced Parts Road Test Automatic transaxle assembly TCM Valve body assembly Shift solenoid valve SL3 Engine assembly ECM Perform pattern 1, 2 and 3 Pattern 1:*1 With shift lever in D, after gradually accelerating to 50 km/h (31 mph) or more, gradually decelerate to approximately 30 km/h (19 mph) Pattern 2: When driving at approximately 50 km/h (31 mph) with the D4 range selected, release the accelerator pedal to allow the vehicle to decelerate gradually to approximately 10 km/h (6 mph). Pattern 3:*2 Accelerate to a speed slightly higher than 50 km/h (31 mph). While gradually decelerating with shift lever in M and 5th gear selected, downshift to 4th gear at approximately 50 km/h (25 mph), to 3rd gear at approximately 40 km/h (25 mph), and to 2nd gear at approximately 30 km/h (19 mph). Shift solenoid valve SL1 Shift solenoid valve SL2 Shift solenoid valve SL4 Shift solenoid valve SL5 Perform pattern 1 and 3 Pattern 1:*1 With shift lever in D, after gradually accelerating to 50 km/h (31 mph) or more, gradually decelerate to approximately 30 km/h (19 mph) Pattern 3:*2 Accelerate to a speed slightly higher than 50 km/h (31 mph). While gradually decelerating with shift lever in M and 5th gear selected, downshift to 4th gear at approximately 50 km/h (25 mph), to 3rd gear at approximately 40 km/h (25 mph), and to 2nd gear at approximately 30 km/h (19 mph). HINT: *1: After gradually accelerating for a distance of approximately 130 m (426.4 ft.) for a period of approximately 15 seconds, gradually decelerate for a distance of approximately 45 m (147.6 ft.) for a period of approximately 5 seconds. *2: Accelerate the vehicle to a speed slightly higher than 50 km/h (31 mph). Move the shift lever to M and select 5th gear. Release the accelerator pedal and allow the vehicle to decelerate gradually. When the vehicle decelerates to approximately 50 km/h (31 mph), downshift to 4th gear. When the vehicle decelerates to approximately 40 km/h (25 mph), downshift to 3rd gear. When the vehicle decelerates to approximately 30 km/h (19 mph), downshift to 2nd gear. When decelerating, apply the brakes as necessary to adjust the vehicle speed. HINT: *1: The speed, time and distance values are approximate values. *2: After accelerating, the deceleration does not need to be performed immediately. *3: There is no specified time or distance. Repeat the road tests until the shift shock and engine speed overrun (engine speed flare when shifting) reach an acceptable level. NOTE: When repeating the acceleration/deceleration cycle of a road test pattern, bring the vehicle to a complete stop before accelerating again.
3. RESET MEMORY NOTE: Perform Reset Memory (AT initialization) when replacing the engine assembly or ECM. Reset Memory can be performed only with the Techstream. Reset Memory cannot be completed by only disconnecting and reconnecting the cable to the negative (-) battery terminal. HINT: The TCM (ECT) memorizes the vehicle conditions when controlling the automatic transaxle assembly and engine assembly. The "Reset Memory" procedure is as follows: Turn the engine switch off. Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Enter the following menus: Powertrain / ECT / Utility / Reset Memory. NOTE: After performing the Reset Memory, be sure to perform the Road Test described previously. Refer to «ROAD TEST [07/2012 - ]»(ref-602573-S14035232962014030500000) .

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1. TEST MONITOR DRIVE PATTERN FOR ECT WARNING: Perform this drive pattern on a level surface and strictly observe the posted speed limits and traffic laws while driving. HINT: Performing this drive pattern is one method to simulate the TCM (ECT) malfunction detection conditions. Some DTCs may not be detected through ordinary, everyday driving. Also, DTCs may not be detected through this drive pattern. Preparation for driving Warm up the engine sufficiently (engine coolant temperature is 60°C (140°F) or higher). Drive the vehicle when the atmospheric temperature is -10°C (14°F) or higher. Some malfunctions are not detected when the atmospheric temperature is less than -10°C (14°F). Drive pattern Drive the vehicle through all the gears. Stop --> 1st --> 2nd --> 3rd --> 4th --> 5th --> 6th --> 7th --> 8th --> 8th (lock-up ON). Perform an engine braking test with the shift lever in D. While driving in the D8 range and 8th gear lock-up, operate the "-" paddle switch and down-shift from 8th to 7th, 7th to 6th, 6th to 5th, 5th to 4th, 4th to 3rd, 3rd to 2nd and 2nd to 1st. Check that engine braking is normal for every down-shift. Repeat the above drive pattern three times or more. NOTE: When using the Techstream, the monitor status can be checked in the Data List. Refer to «DATA LIST / ACTIVE TEST [07/2012 - ]»(ref-602573-S36317638522014030500000) . In the event that the drive pattern must be interrupted (due to traffic conditions or other factors), the drive pattern can be resumed and, in most cases, the monitor can be completed. HINT: *1: Drive the vehicle at a speed in top gear that will cause lock-up to engage. The vehicle can be driven at a speed lower than that in the above diagram under the lock-up condition. NOTE: It is necessary to drive the vehicle for approximately 30 minutes to detect DTC P0711 (ATF temperature sensor malfunction).