LX470 USA 2004 AT pre inspection xe toyota

DI−361 DIAGNOSTICS − AUTOMATIC TRANSMISSION DICEC−01 PRE−CHECK (a) DIAGNOSIS SYSTEM Description (1) When troubleshooting OBD II vehicles, the only difference from the usual troubleshooting procedure is that you need to connect an OBD II scan tool complying with SAE J1987 or a hand−held tester to the vehicle, and read off various data output from the vehicle’s ECM (2) FI0534 2004 LEXUS LX470 (RM1056U) OBD II regulations require that the vehicle’s on− board computer illuminate the Malfunction Indicator Lamp (MIL) on the instrument panel when the computer detects a malfunction in the computer itself or in the drive system components which affect the vehicle emissions In addition to the MIL illuminating when a malfunction is detected, the applicable DTCs prescribed by SAE J2012 are recorded in the ECM memory (See page DI−390) If the malfunction does not occur in consecutive trips, the MIL goes off but the DTCs remain in the ECM memory (3) To check the DTCs, connect the OBD II scan tool or hand−held tester to the DLC3 of the vehicle The OBD II scan tool or hand−held tester also enables you to erase the DTCs and check freeze frame data and various forms of engine data (For instruction book) (4) The DTCs include SAE cont r olled c odes and Manufacturer controlled codes SAE controlled codes must be set as prescribed by the SAE, while Manufacturer controlled codes can be set freely by a manufacturer within the prescribed limits (See the DTC chart on page DI−390) (5) The diagnosis system operates in the normal mode during the normal vehicle use, and also has a check mode for technicians to simulate malfunction symptoms and perform troubleshooting Most DTCs use trip detection logic(*) to prevent erroneous detection By switching the ECM to the check mode when troubleshooting, the technician can cause the MIL to light up for a malfunction that is only detected once or momentarily (hand−held tester) (6) *2 trip detection logic: When a malfunction is first detected, the malfunction is temporarily stored in the ECM memory If the same malfunction is detected again during the second test drive, this second detection causes the MIL to illuminate DI−362 DIAGNOSTICS (b) − AUTOMATIC TRANSMISSION Inspect the DLC3 The vehicle’s ECM uses ISO 9141−2 for communication The terminal arrangement of DLC3 complies with SAE J1962 and matches the ISO 9141−2 format 10 11 12 13 1415 16 DLC3 A04550 Condition Tester connection (Bus Line) − (Signal ground) During communication Specified condition Pulse generation (Chassis Ground) − Body Always W or less (Signal Ground) − Body Always W or less 16 (B+) − Body Always to 14 V HINT: If your display shows UNABLE TO CONNECT TO VEHICLE when you have connected the cable of the OBD II scan tool or hand−held tester to the DLC3, turned the ignition switch ON and operated the scan tool, there is a problem on the vehicle side or tool side S If the communication is normal when the tool is connected to another vehicle, inspect the DLC3 on the original vehicle S If the communication is still impossible when the tool is connected to another vehicle, the problem is probably in the tool itself, so consult the Service Department listed in the tool’s instruction manual (c) Inspect the battery voltage Battery Voltage: 11 to 14 V If voltage is below 11 V, recharge the battery before proceeding (d) Check the MIL (1) The MIL comes on when the ignition switch is turned ON and the engine is not running HINT: If the MIL does not light up, troubleshoot the combination meter (See page BE−82) (2) When the engine is started, the MIL should go off If the lamp remains on, it means that the diagnosis system has detected a malfunction or abnormality in the system 2004 LEXUS LX470 (RM1056U) DI−363 DIAGNOSTICS − AUTOMATIC TRANSMISSION Normal Mode: DTC CHECK NOTICE: Hand−held tester only: When the diagnostic system is switched from the normal mode to the check mode, all the DTCs and freeze frame data recorded in the normal mode will be erased So before switching modes, always check the DTCs and freeze frame data, and note them down Hand−held tester DLC3 F06425 (a) Checking DTCs using the OBD II scan tool or hand−held tester (1) Connect the OBD II scan tool or hand−held tester to DLC3 (2) Turn the ignition switch ON (3) Use the OBD II scan tool or hand−held tester to check the DTCs and freeze frame data and note them down (For operating instructions, see the OBD II scan tool’s instruction book) (4) See page DI−390 to confirm the details of the DTCs NOTICE: When simulating symptoms with an OBD II scan tool (excluding hand−held tester) to check the DTCs, use the normal mode For codes on the DTCs chart subject to ”2 trip detection logic”, turn the ignition switch OFF after the symptom is simulated once Then repeat the simulation process again When the problem has been simulated twice, the MIL is indicated on the instrument panel and DTCs are recorded in the ECM (b) (c) 2004 LEXUS LX470 (RM1056U) When using the OBD II scan tool or hand−held tester: Clearing the DTCs (1) Connect the OBD II scan tool or hand−held tester to DLC3 (2) Turn the ignition switch ON (3) When operating an OBD II scan tool (complying with SAE J1978) or hand−held tester to erase the codes, the DTCs and freeze frame data will be erased (See the OBD II scan tool’s instruction book for operating instructions.) When not using the OBD II scan tool or hand−held tester: Clearing the DTCs (1) Disconnecting the battery terminal or remove the EFI and ETCS fuse from engine room J/B for 60 seconds or more DI−364 DIAGNOSTICS − AUTOMATIC TRANSMISSION Check Mode: DTC CHECK HINT: Hand−held tester only: Compared to the normal mode, the check mode has more sensing ability to detect malfunctions Furthermore, the same diagnostic items which are detected in the normal mode can also be detected in the check mode Hand−held tester DLC3 F06425 (a) Procedure for Check Mode using the hand−held tester (1) Check the initial conditions S Battery positive voltage 11 V or more S Throttle valve fully closed S Transmission in P or N position S A/C switched OFF (2) Turn the ignition switch OFF (3) Connect the hand−held tester to the DLC3 (4) Turn the ignition switch ON (5) Flashing ON OFF 0.13 Second FI3605 2004 LEXUS LX470 (RM1056U) Switch the hand−held tester from the normal mode to the check mode (Check that the MIL flashes) NOTICE: If the hand−held tester switches the ECM from the normal mode to the check mode or vice−versa, or if the ignition switch is turned from ON to ACC or OFF during the check mode, the DTC and freeze frame data will be erased (6) Start the engine (MIL goes off after the engine starts) (7) Simulate the conditions of the malfunction described by the customer NOTICE: Leave the ignition switch ON until you have checked the DTCs, etc (8) After simulating the malfunction conditions, use the hand−held tester diagnosis selector to check the DTCs and freeze frame data, etc HINT: Be sure not to turn the ignition switch OFF, as turning it OFF switches the diagnosis system from the check mode to the normal mode, which erases all the DTCs, etc (9) After checking the DTC, inspect the applicable circuit (b) When using the OBD II scan tool or hand−held tester: Clearing the DTCs (1) Connect the OBD II scan tool or hand−held tester to DLC3 (2) Turn the ignition switch ON DI−365 DIAGNOSTICS − AUTOMATIC TRANSMISSION (3) (c) When operating an OBD II scan tool (complying with SAE J1978) or hand−held tester to erase the codes, the DTCs and freeze frame data will be erased (See the OBD II scan tool’s instruction book for operating instructions.) When not using the OBD II scan tool or hand−held tester: Clearing the DTCs (1) Disconnecting the battery terminal or remove the EFI and ETCS fuse from engine room J/B for 60 seconds or more DATA LIST HINT: According to the DATA LIST displayed by the OBD II scan tool or Hand−held tester, you can read the value of the switch, sensor, actuator and so on without parts removal Reading the DATA LIST as a 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 OBD II scan tool or Hand−held tester to the DLC3 (d) Turn the ignition switch ON (e) Push the ”ON” button of OBD ll scan tool or Hand−held tester (f) Select the item ”/DIAGNOSIS/ENHANCED OBD ll/DATA LIST/ALL (or ATM)” (g) According to the display on tester, read the ”DATA LIST” Item Measurement Item/ Display (Range) STOP LIGHT SW Stop light SW Status/ ON or OFF Normal Condition S Brake Pedal is depressed: ON S Brake Pedal is released: OFF ¬ Shift Lever Position is; S L: 1st S 2: 1st or 2nd S 3: 1st, 2nd or 3rd S 4: 1st, 2nd, 3rd or 4th S D: 1st, 2nd, 3rd, 4th or 5th ¬ SHIFT Actual Gear Position/ 1st, 2nd, 3rd, 4th or 5th PNP SW [NSW] PNP SW Status/ ON or OFF Shift lever position is; P or N: ON Except P or N: OFF REVERSE PNP SW Status/ ON or OFF Shift lever position is; R: ON Except R: OFF DRIVE PNP SW Status/ ON or OFF Shift lever position is; D and 4: ON Except D and 4: OFF 4th/DRIVE PNP SW Status/ ON or OFF Shift lever position is; 4: ON Except 4: OFF 3RD PNP SW Status/ ON or OFF Shift lever position is; 3: ON Except 3: OFF 2ND PNP SW Status/ ON or OFF Shift lever position is; and L: ON Except and L: OFF LOW PNP SW Status/ ON or OFF Shift lever position is; L: ON Except L: OFF LOCK UP SOL Lock Up Solenoid Status/ ON or OFF 2004 LEXUS LX470 (RM1056U) Diagnostic Note S Lock Up: ON S Except Lock Up: OFF Th shift The hift lever l position iti and d these th values are different, there are failures of the PNP switch or shift cable adjustment adjustment ¬ DI−366 DIAGNOSTICS PATTERN SW (M) Pattern SW (PWR) Status/ ON or OFF − AUTOMATIC TRANSMISSION Pattern SW (PWR) is; Pushed in: ON Pushed once again: OFF ¬ ¬ SNOW SW Pattern SW (2nd) Status/ ON or OFF S IG SW ON: OFF ¯ S Pattern SW (2nd) Push: ON ¯ S Pattern SW (2nd) Push: OFF SOLENOID (SLT) Shift Solenoid SLT Status/ ON or OFF IG SW ON: ON ¬ SOLENOID (SLU) Shift Solenoid SLU Status/ ON or OFF S Lock Up: ON S Except Lock Up: OFF ¬ SPD (SP2) Counter Gear Speed display/ min.: km/h (0 mph) max.: 255 km/h (158 mph) Vehicle stopped: km/h (0 mph) ¬ AT FLUID TEMP ATF Temp Sensor No Value/ min.: −40_C (−40_F) max.: 215_C (419_F) 80_C (176_F) (After Stall Test) If the value is ”−40_C (−40_F)” or ”215_C (419_F)”, ATF temp sensor No circuit is opened or shorted ACTIVE TEST 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 a 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 to the DLC3 (d) Turn the ignition switch ON (e) Push the ”ON” button of Hand−held tester (f) Select the item ”/DIAGNOSIS/ENHANCED OBD ll/ACTIVE TEST” (g) According to the display on tester, perform the ”ACTIVE TEST” Item Test Details Diagnostic Note SHIFT [Test Details] Operate the shift solenoid valve and set the each shift position by yourself [Vehicle Condition] Less than 50 km/h (31 mph) [Others] S Press ® button: Shift up S Press ¬ button: Shift down Possible to check the operation of the shift solenoid values HINT: Shifting to the 5th gear is possible only when the vehicle stops or idle is ON LOCK UP LINE PRESS UP 2004 LEXUS LX470 (RM1056U) [Test Details] Control the shift solenoid SLU to set the ATM to the lock−up condition Possible to check the SLU opera[Vehicle Condition] tion Vehicle Speed: 58 km/h (36 mph) or more [Test Details] Operate the shift solenoid SLT and raise the line pressure [Vehicle Condition] S Vehicle Stopped S IDL: ON [Others] ON: Line pressure up OFF: No action (normal operation) − DI−367 DIAGNOSTICS − AUTOMATIC TRANSMISSION DEFINITION OF TERMS Term Definition Monitor description Description of what the ECM monitors and how it detects malfunctions (monitoring purpose and its details) Related DTCs Diagnostic code Typical enabling condition Preconditions that allow the ECM to detect malfunctions With all preconditions satisfied, the ECM sets the DTC when the monitored value(s) exceeds the malfunction threshold(s) Sequence of operation The priority order that is applied to monitoring, if multiple sensors and components are used to detect the malfunction While another sensor is being monitored, the next sensor or component will not be monitored until the previous monitoring has concluded Required sensor/components The sensors and components that are used by the ECM to detect malfunctions Frequency of operation The number of times that the ECM checks for malfunctions per driving cycle ”Once per driving cycle” means that the ECM detects malfunction only one time during a single driving cycle ”Continuous” means that the ECM detects malfunction every time when enabling condition is met Duration The minimum time that the ECM must sense a continuous deviation in the monitored value(s) before setting a DTC This timing begins after the ”typical enabling conditions” are met Malfunction thresholds Beyond this value, the ECM will conclude that there is a malfunction and set a DTC MIL operation MIL illumination timing after a defect is detected ”Immediately” means that the ECM illuminates MIL the instant the ECM determines that there is a malfunction ”2 driving cycle” means that the ECM illuminates MIL if the same malfunction is detected again in the 2nd driving cycle TOYOTA/LEXUS PART AND SYSTEM NAME LIST This reference list indicates the part names used in this manual along with their definitions TOYOTA/LEXUS name Definition Toyota HCAC system, Hydrocarbon adsorptive Catalyst (HCAC) system, HC adsorptive three−way catalyst HC adsorptive three−way catalytic converter Variable Valve Timing sensor, VVT sensor Camshaft position sensor Variable valve timing system, VVT system Camshaft timing control system Camshaft timing oil control valve, Oil control valve OCV, VVT, VSV Camshaft timing oil control valve Variable timing and lift, VVTL Camshaft timing and lift control Crankshaft position sensor ”A” Crankshaft position sensor Engine speed sensor Crankshaft position sensor THA Intake air temperature Knock control module Engine knock control module Knock sensor Engine knock sensor Mass or volume air flow circuit Mass air flow sensor circuit Vacuum sensor Manifold air pressure sensor Internal control module, Control module, Engine control ECU, PCM Power train control module FC idle Deceleration fuel cut Idle air control valve Idle speed control VSV for CCV, Canister close valve VSV for canister control Evaporative emissions canister vent valve VSV for EVAP, Vacuum switching valve assembly No 1, EVAP VAV, Purge VSV Evaporative emissions canister purge valve VSV for pressure switching valve, Bypass VSV Evaporative emission pressure switching valve Vapor pressure sensor, EVAP pressure sensor, Evaporative emission control system pressure sensor Fuel tank pressure sensor Charcoal canister Evaporative emissions canister ORVR system On−boad refueling vapor recovery system Intake manifold runner control Intake manifold tuning system Intake manifold runner valve, IMRV, IACV (runner valve) Intake manifold tuning valve Intake control VSV Intake manifold tuning solenoid valve 2004 LEXUS LX470 (RM1056U) DI−368 DIAGNOSTICS − AUTOMATIC TRANSMISSION AFS Air fuel ratio sensor O2 sensor Heater oxygen sensor Oxygen sensor pumping current circuit Oxygen sensor output signal Oxygen sensor reference ground circuit Oxygen sensor signal ground Accel position sensor Accelerator pedal position sensor Throttle actuator control motor, Actuator control motor, Electronic throttle motor, Throttle control motor Electronic throttle actuator Electronic throttle control system, Throttle actuator control system Electronic throttle control system Throttle/pedal position sensor, Throttle/pedal position switch, Throttle position sensor/switch Throttle position sensor Turbo press sensor Turbocharger pressure sensor Turbo VSV Turbocharger pressure control solenoid valve P/S pressure switch Power−steering pressure switch VSV for ACM Active control engine mount Speed sensor, Vehicle speed sensor ”A”, Speed sensor for skid control ECU Vehicle speed sensor ATF temperature sensor, Trans fluid temp sensor, ATF temperature sensor ”A” Transmission fluid temperature sensor Electronic controlled automatic transmission, ECT Electronically controlled automatic Intermediate shaft speed sensor ”A” Counter gear speed sensor Output speed sensor Output shaft speed sensor Input speed sensor, Input turbine speed sensor ”A”, Speed sensor (NT), Turbine speed sensor Input turbine speed sensor PNP switch, NSW Park/neutral position switch Pressure control solenoid Transmission pressure control solenoid Shift solenoid Transmission shift solenoid valve Transmission control switch, Shift lock control unit Shift lock control module Engine immobilizer system, Immobilizer system Vehicle anti−theft system 2004 LEXUS LX470 (RM1056U) DI−369 DIAGNOSTICS − AUTOMATIC TRANSMISSION The monitor will run whenever the following DTCs are not present (Monitor disablement List) HINT: This table indicates ECM monitoring status for the items in the upper columns if the DTCs in each line on the left are being set As for the ”X” mark, when the DTC on the left is stored, detection of the DTC in the upper column is not performed D13631 2004 LEXUS LX470 (RM1056U) DI−370 DIAGNOSTICS − AUTOMATIC TRANSMISSION D13632 2004 LEXUS LX470 (RM1056U) DI−375 DIAGNOSTICS (g) − AUTOMATIC TRANSMISSION P position test: Stop the vehicle on a grade (more than 5û) and after shifting into the P position, release the parking brake Then, check that the parking lock pawl holds the vehicle in place DLC3: 11 (a) CG 10 11 12 13 14 15 16 TC D13649 BASIC INSPECTION Check the fluid level (1) Using an SST, short−circuit between terminals TC and CG of the DLC3 SST 09843−18040 (2) Start the engine and run at idle S A/C switch must be turned off S On the model with the active height control suspension & adaptive variable suspension, turn the height control switch off (3) Slowly move the shift lever through all the positions from P to L, and move it back to the P position (4) Move the shift lever from the N to the D position, or from D to N, within 1.5 seconds Perform the above procedure for seconds or more This will activate the oil temperature detection mode Standard: The A/T OIL TEMP warning light comes on for seconds and then goes off (5) Return the shift lever to the P position and disconnect terminal TC and CG (6) Idle the engine to raise the oil temperature (7) Lift up the vehicle right after the meter indicator light ”ATF temperature warning light” comes on S The A/T OIL TEMP warning light indicates the ATF temperature according to the following table ATF Temp Less than optimized temperature Optimized temperature More than optimized temperature A/T OIL TEMP warning light OFF ON Blinking 2004 LEXUS LX470 (RM1056U) DI−376 − DIAGNOSTICS AUTOMATIC TRANSMISSION (8) Remove the overflow plug and check the fluid level Standard: Refill Plug Overflow Plug D13650 When ATF overflows * ATF level is higher than the specification (Go to step (11)) When ATF does not overflow ATF level is equal to or lower than specification (Go to step (9)) *: Since the overflow capacity is cc, check if the drained ATF is cc or more (9) Remove the refill plug Fluid type: AUTO FLUID WS (10) Fill ATF to the refill plug until it flows out from the overflow plug (11) When the draining ATF becomes a trickle, install the overflow plug through a new gasket (12) Install the refill plug (only if the refill plug has been removed) (13) Lower the vehicle down (14) Turn the ignition switch off to stop the engine (b) Check the fluid condition If the fluid smells burnt or is black, replace it (see step 12.) (c) D12640 Inspect and adjust the shift lever position When shifting the shift lever from the N position to other positions, check that the lever can be shifted smoothly and accurately to each position and that the position indicator is not aligned with the correct position If the indicator is not aligned with the correct position, carry out the following adjustment procedures (1) Loosen the nut on the shift lever (2) Push the control shaft fully rearward (3) Loosen this nut Control Shaft Lever 2004 LEXUS LX470 (RM1056U) D11985 Return the control shaft lever notches to N position (4) Set the shift lever to N position (5) While holding the shift lever lightly toward the R position side, tighten the shift lever nut Torque: 13 N·m (130 kgf·cm, ft·lbf) (6) Start the engine and make sure that the vehicle moves forward when shifting the lever from the N to D position and reverses when shifting it to the R position DI−377 DIAGNOSTICS Neutral Basic line Bolt Groove D07226 − AUTOMATIC TRANSMISSION (d) Inspect and adjust the park/neutral position S Check that the engine can be started with the shift lever only in the N or P position, but not in other positions If it is not as stated above, carry out the following adjustment procedures S Loosen the park/neutral position switch bolt and set the shift lever to the N position S Align the groove with neutral basic line S Hold in position and tighten the bolt Torque:13 N·m (130 kgf·cm, ft·lbf) S For continuity inspection of the park/neutral position switch, see page DI−403 (e) Check the idle speed Idle speed (In N position and air conditioner OFF): 700 ± 50 rpm 12 ADD AUTOMATIC TRANSMISSION FLUID Add automatic transmission fluid Maximum amount of fluid should be added when: Minimum amount of fluid should be added when: S removing or installing the oil pan (including the oil drain) S removing the transmission valve body assy S removing the torque converter assy, etc S disconnecting the oil cooler tube S repairing oil leaks, etc Start from [*1] Start from [*4] In step (15) In step (8) When ATF overflows When ATF does not overflow Go to [*2] When ATF overflows Go to [*3] Go to [*5] When ATF does not overflow Go to [*6] END D13657 2004 LEXUS LX470 (RM1056U) DI−378 DIAGNOSTICS (a) Refill Plug − AUTOMATIC TRANSMISSION When adding a maximum amount of fluid: [*1] (1) Lift up the vehicle while keeping it level (2) Remove the refill plug and overflow plug (3) Add ATF to the refill hole until it drains out from the overflow hole Overflow Plug D13650 NOTICE: Be sure to add ATF WS D13651 2004 LEXUS LX470 (RM1056U) DI−379 DIAGNOSTICS − AUTOMATIC TRANSMISSION (4) Temporarily install the gasket and overflow plug Torque: 20 N×m (204 kgf×cm, 15 ft×lbf) (5) Add proper amount of ATF to the refill hole NOTICE: Refill amount is different depending on the related procedures Related procedures Overflow Plug D13652 Refill amount Removal and installation of oil pan 1.7 liters (1.8 us qts, 1.5 lmp.qts) Removal of transmission valve body assy 4.3 liters (4.5 us qts, 3.8 lmp.qts) Removal of torque converter assy 5.4 liters (5.7 us qts, 4.8 lmp.qts) (6) Temporarily install the O−ring and refill plug Torque: 39 N×m (400 kgf×cm, 29 ft×lbf) (7) Lower down the vehicle Refill Plug D13653 (8) DLC3: CG 10 11 12 13 14 15 16 TC 2004 LEXUS LX470 (RM1056U) D13649 Using an SST, short−circuit between terminals TC and CG of the DLC3 SST 09843−18040 (9) Start the engine and run at idle NOTICE: S A/C switch must be turned off S On the model with the active height control suspension & adaptive variable suspension, turn the height control switch off (10) Slowly move the shift lever from the P to the 2−L position Return the shift lever to the P position DI−380 DIAGNOSTICS D13654 When fluid temperature is low: off − AUTOMATIC TRANSMISSION (11) Switch to the fluid temperature detection mode S Move the shift lever from the N to the 4D position, or from 4D to N, within 1.5 seconds S Perform the above procedure for seconds or more Standard: Meter indicator light ”ATF temperature warning light” comes on for seconds and then goes off (12) Disconnect terminals TC and CG after confirming the above condition (13) Idle the engine to raise fluid temperature (14) Lift up the vehicle right after the meter indicator light ”ATF temperature warning light” comes on NOTICE: S Add fluid only when the meter indicator light is on S Perform the procedure while the engine is idling When fluid temperature is proper: on When fluid temperature is high: blinks D13655 (15) Remove the overflow plug If ATF overflows, proceed to [*2] If ATF does not overflow, proceed to [*3] Overflow Plug 2004 LEXUS LX470 (RM1056U) HINT: ”Overflow” indicates the condition that ATF drains out from the overflow tube NOTICE: Capacity of the overflow tube is approximately cc D13652 DI−381 DIAGNOSTICS − AUTOMATIC TRANSMISSION (b) When fluid overflows: [*2] (1) Install the overflow plug through a new gasket when the draining ATF becomes a trickle Torque: 20 N×m (204 kgf×cm, 15 ft×lbf) (2) Install the refill plug through a new O−ring Torque: 39 N×m (400 kgf×cm, 29 ft×lbf) (3) Lower down the vehicle (4) Turn the ignition switch off and remove the SST (5) Check the fluid leaks Check for leaks in the transmission If there are leaks, it is necessary to repair or replace O−rings, FIPGs, oil seals, plugs or other parts D13656 (c) Refill Plug When fluid does not overflow: [*3] (1) Remove the refill plug D13653 (2) D13651 2004 LEXUS LX470 (RM1056U) Add ATF to the refill hole until it drains out from the overflow hole DI−382 DIAGNOSTICS − AUTOMATIC TRANSMISSION (3) Install the overflow plug through a new gasket when the draining ATF becomes a trickle Torque: 20 N×m (204 kgf×cm, 15 ft×lbf) (4) Install the refill plug through a new O−ring Torque: 39 N×m (400 kgf×cm, 29 ft×lbf) (5) Lower down the vehicle (6) Turn the ignition switch off (7) Check the fluid leaks Check for leaks in the transmission If there are leaks, it is necessary to repair or replace O−rings, FIPGs, oil seals, plugs or other parts D13656 (d) DLC3: CG 10 11 12 13 14 15 16 TC D13649 When adding a minimum amount of fluid: [*4] (1) Using an SST, short−circuit between terminals TC and CG of the DLC3 SST 09843−18040 (2) Start the engine and run at idle NOTICE: A/C switch must be turned off (3) Slowly move the shift lever from the P to the 2−L position Return the shift lever to the P position (4) D13654 2004 LEXUS LX470 (RM1056U) Switch to the fluid temperature detection mode S Move the shift lever from the N to the 4D position, or from 4D to N, within 1.5 seconds S Perform the above procedure for seconds or more Standard: Meter indicator light ”ATF temperature warning light” comes on for seconds and then goes off (5) Disconnect terminals TC and CG after confirming the above condition (6) Idle the engine to raise fluid temperature DI−383 DIAGNOSTICS − (7) When fluid temperature is low: off AUTOMATIC TRANSMISSION Lift up the vehicle right after the meter indicator light ”ATF temperature warning light” comes on NOTICE: S Add fluid only when the meter indicator light is on S Perform the procedure while the engine is idling When fluid temperature is proper: on When fluid temperature is high: blinks D13655 (8) Remove the overflow plug If ATF overflows, proceed to [*5] If ATF does not overflow, proceed to [*6] HINT: ”Overflow” indicates the condition that ATF drains out from the overflow tube Overflow Plug D13652 (e) When fluid overflows: [*5] (1) Install the overflow plug through a new gasket when the draining ATF becomes a trickle Torque: 20 N×m (204 kgf×cm, 15 ft×lbf) (2) Install the refill plug through a new O−ring Torque: 39 N×m (400 kgf×cm, 29 ft×lbf) (3) Lower down the vehicle (4) Turn the ignition switch off (5) Check the fluid leaks Check for leaks in the transmission If there are leaks, it is necessary to repair or replace O−rings, FIPGs, oil seals, plugs or other parts D13656 (f) Refill Plug D13653 2004 LEXUS LX470 (RM1056U) When fluid does not overflow: [*6] (1) Remove the refill plug DI−384 DIAGNOSTICS (2) − AUTOMATIC TRANSMISSION Add ATF to the refill hole until it drains out from the overflow hole D13651 (3) Install the overflow plug through a new gasket when the draining ATF becomes a trickle Torque: 20 N×m (204 kgf×cm, 15 ft×lbf) (4) Install the refill plug through a new O−ring Torque: 39 N×m (400 kgf×cm, 29 ft×lbf) (5) Lower down the vehicle (6) Turn the ignition switch off (7) Check the fluid leaks Check for leaks in the transmission If there are leaks, it is necessary to repair or replace O−rings, FIPGs, oil seals, plugs or other parts D13656 2004 LEXUS LX470 (RM1056U) DI−385 DIAGNOSTICS − AUTOMATIC TRANSMISSION 13 (a) MECHANICAL SYSTEM TESTS Measure the stall speed The object of this test is to check the overall performance of the transmission and engine by measuring the stall speeds in the D and R positions NOTICE: S Do the test at normal operating fluid temperature 70 to 80 ûC (158 to 176 ûF) S Do not continuously run this test longer than seconds S To ensure safety, conduct this test in a wide, clear level area which provides good traction S The stall test should always be carried out in pairs One technician should observe the conditions of wheels or wheel stoppers outside the vehicle while the other is doing the test (1) Chock all wheels (2) Connect an OBD II scan tool or hand−held tester to DLC3 (3) Fully apply the parking brake (4) Keep your left foot pressing firmly on the brake pedal (5) Start the engine (6) Shift into the D position Press all the way down on the accelerator pedal with your right foot Quickly read the stall speed at this time Stall speed: 2,150 ± 150 rpm (7) Do the same test in R position Stall speed: 2,150 ± 150 rpm Evaluation: Problem Possible cause (a) Engine stall speed low in D and R positions S Engine output may be insufficient S 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 (b) Engine stall speed high in D position S Line pressure too low S Clutch No (C1) slipping S One−way clutch No.3 (F3) not operating properly (c) Engine stall speed high in R position S Line pressure too low S Brake No (B4) slipping S Clutch No (C3) slipping S One−way clutch No.1 (F1) not operating properly (d) Engine stall speed high in D and R positions S Line pressure too low S Improper fluid level 2004 LEXUS LX470 (RM1056U) DI−386 DIAGNOSTICS − AUTOMATIC TRANSMISSION (b) Measure the time lag When the shift lever is shifted 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 NOTICE: S Do the test at normal operating fluid temperature 70 to 80 ûC (158 to 176 ûF) S Be sure to allow minute interval between tests S Take measurements and take the average value (1) Fully apply the parking brake (2) Start the engine and check idle speed Idle speed (In N position and air conditioner OFF): 700 ± 50 rpm (3) Shift the shift lever from N to D position Using a stop watch, measure the time from when the lever is shifted until the shock is felt Time lag: N ® D Less than 1.2 seconds (4) In the same manner, measure the time lag for N ® R Time lag: N ® R Less than 1.5 seconds Evaluation (If N ® D time or N ® R time lag is longer than the specified): Problem Possible cause N ® D time lag is longer S Line pressure too low S Clutch No (C1) worn S One−way clutch No.3 (F3) not operating properly N ® R time lag is longer S Line pressure too low S Clutch No (C3) worn S Brake No (B4) worn S One−way clutch No.1 (F1) not operating properly 2004 LEXUS LX470 (RM1056U) DI−387 DIAGNOSTICS SST SST D12745 − AUTOMATIC TRANSMISSION 14 HYDRAULIC TEST Measure the line pressure NOTICE: S Do the test at normal operation fluid temperature 70 to 80ûC (158 to 176ûF) S The line pressure test should always be carried out in pairs One technician should observe the conditions of wheels or wheel stoppers outside the vehicle while the other is doing the test S Be careful to prevent SST’s hose from interfering with the exhaust pipe S This check must be conducted after checking and adjusting engine S Perform under condition that A/C is OFF S When conducting stall test, not continue more than 10 seconds (1) Warm up the ATF (2) Remove the test plug on the transmission case center right side and connect SST SST 09992−00095 (09992−00231, 09992−00271) (3) Fully apply the parking brake and chock the wheels (4) Start the engine and check idling speed (5) Keep your left foot pressing firmly on the brake pedal and shift into D position (6) Measure the line pressure when the engine is idling (7) Depress the accelerator pedal all the way down Quickly read the highest line pressure when engine speed reaches stall speed (8) In the same manner, the test in R position Specified line pressure: D position Condition kPa (kgf/cm2, psi) R position kPa (kgf/cm2, psi) Idling 362 to 420 (3.7 to 4.2, 53 to 59) 500 to 580 (5.1 to 5.9, 73 to 84) Stall 1,360 to 1,460 (13.8 to 14.9, 196 to 212) 1,295 to 1,415 (13.2 to 14.4, 188 to 205) Evaluation Problem Possible cause If the measured value at all positions are higher S Shift solenoid valve SLT defective S Regulator valve defective If the measured value at all positions are lower S Shift solenoid valve SLT defective S Regulator valve defective S Oil pump defective If pressure is low in the D position only S D position circuit fluid leakage S Clutch No (C1) defective If pressure is low in the R position only S R position circuit fluid leakage S Clutch No (C3) defective S Brake No (B4) defective 2004 LEXUS LX470 (RM1056U) DI−388 DIAGNOSTICS D11984 − AUTOMATIC TRANSMISSION 15 MANUAL SHIFTING TEST HINT: By this test, it can be determined whether the trouble is within the electrical circuit or is a mechanical problem in the transmission (a) Disconnect the transmission wire (b) Inspect the manual driving operation Check that the shift and gear positions correspond with the table below While driving, shift through the L, 2, 3, and D positions Check that the gear change corresponds to the shift position Shift Position Gear Position D 4th 4th 3rd 1st L 1st R Reverse P Pawl Lock HINT: If the gear positions of the L, 2, 3, and D are difficult to distinguish, the following road test If any abnormality is found in the above test, the problem is in the transmission itself (c) Connect the transmission wire (d) Cancel out DTC 2004 LEXUS LX470 (RM1056U) DI−389 DIAGNOSTICS − AUTOMATIC TRANSMISSION 16 RESET MEMORY CAUTION: Perform the RESET MEMORY (AT initialization) when replacing the automatic transmission assy, engine assy or the ECM NOTICE: Hand−held tester only HINT: The ECM memorizes the condition that the ECT controls the automatic transmission assy and engine assy according to those characteristics Therefore, when the automatic transmission assy, engine assy, or ECM has been replaced, it is necessary to reset the memory so that the ECM can memorize the new information Reset procedure is as follows (a) Turn the ignition switch off (b) Connect the hand−held tester to the DLC3 (c) Turn the ignition switch to the ON position and push the hand−held tester main switch on (d) Select the item ”DIAGNOSIS/ENHANCED OBD II” (e) Perform the reset memory procedure from the ENGINE menu CAUTION: After performing the RESET MEMORY, be sure to perform the ROAD TEST described earlier Tester menu flow: D13545 2004 LEXUS LX470 (RM1056U)