Automatic Transmission (U151E): Diagnosis Lexus RX II facelift

HOW TO PROCEED WITH TROUBLESHOOTING

HINT

The intelligent tester can be used at steps 3, 4, 6, and 9.

1. Vehicle Brought to Workshop
2. Customer Problem Analysis
3. Connect the OBD II scan tool or intelligent tester to DLC3
4. Check and Clear DTCs and Freeze Frame Data HINT: (See DTC CHECK / CLEAR ).
5. Visual Inspection
6. Setting the Check Mode Diagnosis HINT: (See DIAGNOSIS SYSTEM ).
7. Problem Symptom Confirmation HINT: (See ROAD TEST ). Symptom does not occur: Go to step 8 Symptom occurs: Go to step 9
8. Symptom Simulation HINT: (See HOW TO PROCEED WITH TROUBLESHOOTING ).
9. DTC Check HINT: (See DTC CHECK / CLEAR ). DTC is not output: Go to step 10 DTC is output: Go to step 17
10. Basic Inspection HINT: (See ON-VEHICLE INSPECTION , INSPECTION and ADJUSTMENT ). NG: Go to step 19 OK: Go to next step
11. Mechanical System Test HINT: (See MECHANICAL SYSTEM TESTS ). NG: Go to step 16 OK: Go to next step
12. Hydraulic Test HINT: (See HYDRAULIC TEST ). NG: Go to step 16 OK: Go to next step
13. Manual Shifting Test HINT: (See MANUAL SHIFTING TEST ). NG: Go to step 15 OK: Go to next step
14. Problem Symptoms Table Chapter 1 HINT: (See PROBLEM SYMPTOMS TABLE ). NG: Go to step 18 OK: Go to next step
15. Problem Symptoms Table Chapter 2 HINT: (See PROBLEM SYMPTOMS TABLE ).
16. Part Inspection Go to step 19
17. DTC Chart HINT: (See DIAGNOSTIC TROUBLE CODE CHART ).
18. Circuit Inspection
19. Repair or Replace
20. Confirmation Test End

ROAD TEST

1. PROBLEM SYMPTOM CONFIRMATION Based on the result of the customer problem analysis, try to reproduce the symptoms. If the problem is that the transaxle does not shift up, shift down, or the shift point is too high or too low, conduct the following road test referring to the automatic shift schedule and simulate the problem symptoms.
2. ROAD TEST (Gate shift lever type) NOTE: Perform the test at the ATF temperature 50 to 80°C (122 to 176°F) in the normal operation. D position test: Shift into the D position and fully depress the accelerator pedal and check the following points. Check up-shift operation. Check that 1 --> 2, 2 --> 3, 3 --> 4 and 4 --> 5th upshifts take place, and that the shift points conform to the automatic shift schedule (See U151E AUTOMATIC TRANSAXLE ). HINT: 5th Gear Up-shift Prohibition Control Coolant temperature is 68°C (154°F) or less and vehicle speed is at 70 km/h (43 mph) or less. AFT temperature is -2°C (28°F) or less. 4th Gear Up-shift Prohibition Control Coolant temperature is 65°C (149°F) or less and vehicle speed is at 55 km/h (34 mph) or less. 5th and 4th Gear Lock-up Prohibition Control Brake pedal is depressed. Accelerator pedal is released. Coolant temperature is 60°C (140°F) or less. Check for shift shock and slip. Check for shock and slip at the 1 --> 2, 2 --> 3, 3 --> 4 and 4 --> 5th up-shifts. Check for abnormal noise and vibration. Drive in the D position lock-up or 5th gear, and check for abnormal noises and vibration. HINT: The check for the cause of abnormal noise and vibration must be done very thoroughly as it could also be due to loss of balance in the differential, torque converter clutch, etc. Check kick-down operation. Check that the possible kick-down vehicle speed limits for 2nd to 1st, 3rd to 2nd, 4th to 3rd, 5th to 4th kick-downs conform to those indicated on the automatic shift schedule while driving through all gears with the shift lever in the D position (See SERVICE DATA ). Check abnormal shock and slip at kick-down. Check the lock-up mechanism. Drive in D position (5th gear), at a steady speed (lock-up ON). Lightly depress the accelerator pedal and check that the engine speed does not change abruptly. HINT: There is no lock-up in the 1st and 2nd gear. 4th lock-up operates while uphill-downhill control is active in D position. 3rd lock-up operates while uphill-downhill control is active. If there is a big jump in engine speed, there is no lock-up. 4 position test: Shift into the 4 position and fully depress the accelerator pedal and check the following points. Check up-shift operation. Check that the 1 --> 2, 2 --> 3 and 3 --> 4 up-shift take place and that the shift point conforms to the automatic shift schedule (See U151E AUTOMATIC TRANSAXLE ). HINT: There is no 5th up-shift in the 4 position. Check engine braking. While driving in the 4 position and 4th gear, release the accelerator pedal and check the engine braking effect. Check for abnormal noise during acceleration and deceleration, and for shock at up-shift and down-shift. 3 position test: Shift into the 3 position and fully depress the accelerator pedal and check the following points. Check up-shift operation. Check that the 1 --> 2 and 2 --> 3 up-shift take place and that the shift point conforms to the automatic shift schedule (See U151E AUTOMATIC TRANSAXLE ). HINT: There is no 4th up-shift and lock-up in the 3 position. Check engine braking. While running in the 3 position and 3rd gear, release the accelerator pedal and check the engine braking effect. Check for abnormal noise during acceleration and deceleration, and for shock at up-shift and down-shift. 2 position test: Shift into the 2 position and fully depress the accelerator pedal and check the following points. Check up-shift operation. Check that the 1 --> 2 up-shift takes place and that the shift point conforms to the automatic shift schedule (See U151E AUTOMATIC TRANSAXLE ). HINT: There is no 3rd up-shift and lock-up in the 2 position. Check engine braking. While running in the 2 position and 2nd gear, release the accelerator pedal and check the engine braking effect. Check for abnormal noise during acceleration and deceleration, and for shock at up-shift and down-shift. L position test: Shift into the L position and fully depress the accelerator pedal and check the following points. Check no up-shift. While running in the L position, check that there is no up-shift to 2nd gear. HINT: There is no lock-up in the L position. Check engine braking. While running in the L position, release the accelerator pedal and check the engine braking effect. Check for abnormal noise during acceleration and deceleration. R position test: Shift into the R position and fully depress the accelerator pedal and check for slipping. CAUTION: Before conducting this test ensure that the test area is free from people and obstruction. P position test: Stop the vehicle on the grade (more than 5°) and after shifting into the P position, release the parking brake. Then, check that the parking lock pawl holds the vehicle in place. Uphill/downhill control function test: Check that the gear does not up-shift to the 4th or 5th gear while the vehicle is driving uphill. Check that the gear automatically down-shifts from 5th to 4th or from the 4th to 3rd gear when brake is applied while the vehicle is driving downhill.
3. ROAD TEST (Shift lever with Multi-mode automatic transmission type) NOTE: Perform the test at the ATF temperature 50 to 80°C (122 to 176°F) in the normal operation. D position test: Shift into the D position and fully depress the accelerator pedal and check the following points. Check up-shift operation. Check that 1 --> 2, 2 --> 3, 3 --> 4 and 4 --> 5th upshifts take place, and that the shift points conform to the automatic shift schedule (See U151E AUTOMATIC TRANSAXLE ). HINT: 5th Gear Up-shift Prohibition Control Coolant temperature is 68°C (154°F) or less and vehicle speed is at 70 km/h (43 mph) or less. ATF temperature is -2°C (28°F) or less. 4th Gear Up-shift Prohibition Control Coolant temperature is 65°C (149°F) or less and vehicle speed is at 55 km/h (34 mph) or less. 5th and 4th Gear Lock-up Prohibition Control Brake pedal is depressed. Accelerator pedal is released. Coolant temperature is 60°C (140°F) or less. Check for shift shock and slip. Check for shock and slip at the 1 --> 2, 2 --> 3, 3 --> 4 and 4 --> 5th up-shifts. Check for abnormal noise and vibration. Drive in the D position lock-up or 5th gear and check for abnormal noises and vibration. HINT: The check for the cause of abnormal noise and vibration must be done very thoroughly as it could also be due to loss of balance in the differential, torque converter clutch, etc. Check kick-down operation. Check that the possible kick-down vehicle speed limits for 2nd to 1st, 3rd to 2nd, 4th to 3rd, 5th to 4th kick-downs conform to those indicated on the automatic shift schedule while driving through all gears with the shift lever in the D position (See U151E AUTOMATIC TRANSAXLE ). Check abnormal shock and slip at kick-down. Check the lock-up mechanism. Drive in D position (5th gear), at a steady speed (lock-up ON). Lightly depress the accelerator pedal and check that the engine speed does not change abruptly. HINT: There is no lock-up in the 1st and 2nd gear. 4th lock-up operates while uphill-downhill is active in the D position. 3rd lock-up operates while uphill-downhill control is active. If there is a big jump in engine speed, there is no lock-up. S position test Shift to the S position, depress the accelerator pedal and check the following points: Check shift operation. While driving in the D position and 5th gear, shift into the D position and S position and back to the D position. Check that the gear change 5 --> 4 down-shift and 4 --> 5 up-shift can be performed. With the shift lever in the S position (with the vehicle stopped), shift into the "+" position to check that the shift position on the combination meter changes as follows: 1 --> 2, 2 --> 3, 3 --> 4 and 4 --> 5. While driving in the 4(S) position and 4th gear (at a vehicle speed of about 40 to 50km/h (25 to 31 mph)), shift into the "-" position and check if the 3rd gear down-shift occurs and the engine brake performs properly. While driving in the 3(S) position and 3rd gear (at a vehicle speed of about 30 to 40 km/h (19 to 25 mph)), shift into the "-" position and check if the 2nd gear down-shift occurs and the engine brake performs properly. While driving in the 2(S) position and 2nd gear (at a vehicle speed of about 20 to 30 km/ h (12 to 19 mph)), shift into the "-" position and check if the 1st gear down-shift occurs and the engine brake performs properly. HINT: Manual shift (S position) prohibition control Down-shifting causes engine overrun. Down-shifting is required continuously. (Down-shifting to 1st gear may not be performed.) R position test: Shift into the R position and fully depress the accelerator pedal and check for slipping. CAUTION: Before conducting this test ensure that the test area is free from people and obstruction. P position test: Stop the vehicle on a grade (more the 5°) and after shifting into the P position, release the parking brake. Then, check that the parking lock pawl holds the vehicle in place. Uphill/downhill control function test: Check that the gear does not up-shift to the 4th or 5th gear while the vehicle is driving uphill. Check that the gear automatically down-shifts from the 5th to 4th or from the 4th to 3rd gear when brake is applied while the vehicle is driving downhill.

PROBLEM SYMPTOMS TABLE

HINT

1. If a normal code is displayed during the diagnostic trouble code check although the trouble still occurs, check the electrical circuits for each symptom in the order given in the charts in the following information and proceed to the link given for troubleshooting.
2. The Matrix Chart is divided into 2 chapters.
3. When the circuit on which mark *1 is attached is a malfunction, DTC could be output.

Refer to the table below when the trouble cause is considered to be electrical the instruction "Proceed to next circuit inspection shown on matrix chart" is given in the flow chart of each circuit, proceed to the circuit with the next highest number in the table to continue the check. If the trouble still occurs even though there are no abnormalities in any of the other circuits, check and replace the ECM.

1. Chapter 1: Electronic Circuit Matrix Chart PROBLEM SYMPTOMS TABLE Symptom Suspected area No down-shift (A particular gear, from 1st to 4th gear, is not down-shifted) ECM No down-shift (5th -> 4th) 1. Park / neutral position switch circuit *1 2. Shift solenoid valve (s4) circuit *1 3. ECM No up-shift (A particular gear, from 1st to 4th gear, is not up-shifted) ECM No up-shift (4th -> 5th) 1. Park / neutral position switch circuit *1 2. Shift solenoid valve (s4) circuit *1 3. ECM No lock-up 1. Stop light switch circuit *1 2. Engine coolant temp. sensor circuit *1 3. ECM No lock-up off ECM Shift point too high or too low 1. Throttle position sensor circuit *1 2. ECM Up-shift to 5th from 4th while shift lever is in 4 position *2 1. Park/neutral position switch circuit *1 2. ECM Up-shift to 5th from 4th while engine is cold 1. Engine coolant temp. sensor circuit *1 2. ECM Up-shift to 2nd from 1st while shift lever is in L position *2 1. Park/neutral position switch circuit *1 2. ECM No gear change by shifting into "+" or "-" while the shifting lever is in the S position 1. Transmission control switch circuit 2. ECM Harsh engagement (N -> D) 1. Shift solenoid valve (sl1) circuit *1 2. ECM Harsh engagement (Lock-up) ECM Harsh engagement (Any driving position) ECM Poor acceleration 1. Pattern select switch circuit (ect snow switch) 2. Multiplex network body ECU 3. ECM No kick-down ECM Engine stalls when starting off or stopping ECM ECT SNOW does not operate 1. Pattern select switch circuit (ect snow switch) 2. Multiplex network body ECU 3. ECM Malfunction in shifting 1. Park/neutral position switch circuit *1 2. Transmission control switch circuit *3 3. ECM HINT: *1: When the circuit on which mark *1 is detective, a DTC may be output. *2: Gate shift lever type *3: Shift lever with Multi-mode automatic transmission type
2. Chapter 2: On-Vehicle Repair and Off-Vehicle Repair PROBLEM SYMPTOMS TABLE Symptom Suspected area Vehicle does not move in any forward position and in reverse positions 1. Valve body assembly 2. U/D brake (B3) 3. Torque converter clutch Vehicle does not move in R position 1. Valve body assembly 2. Reverse clutch (C2) 3. 1st and reverse brake (B2) No up-shift (1st -> 2nd) 1. Valve body assembly 2. 2nd and O/D brake (B1) No up-shift (2nd -> 3rd) 1. Valve body assembly 2. Direct and O/D clutch (C0) No up-shift (3rd -> 4th) 1. Valve body assembly 2. 2nd and O/D brake (B1) No up-shift (4th -> 5th) 1. Shift solenoid valve (s4) 2. Valve body assembly 3. U/D clutch (C3) No down-shift (5th -> 4th) 1. Shift solenoid (s4) 2. Valve body assembly No down-shift (4th -> 3rd) Valve body assembly No down-shift (3rd -> 2nd) Valve body assembly No down-shift (2nd -> 1st) Valve body assembly No lock-up or No lock-up off 1. Shift solenoid valve (DSL) 2. Valve body assembly 3. Torque converter clutch Harsh engagement (N -> D) 1. Shift solenoid valve (SL1) 2. Valve body assembly 3. C1 accumulator 4. Forward clutch (C1) 5. One-way clutch No.1 (F1) 6. U/D one-way clutch (F2) Harsh engagement (Lock-up) 1.Shift solenoid valve (SL2) 2. Valve body assembly 3. Torque converter clutch Harsh engagement (N -> R) 1. Valve body assembly 2. C2 accumulator 3. Reverse clutch (C2) 4. 1st and reverse brake (B2) Harsh engagement (1st -> 2nd -> 3rd -> 4th -> 5th) 1. Shift solenoid valve (SLT) 2. Valve body assembly Harsh engagement (1st -> 2nd) 1. Valve body assembly 2. 2nd and O/D brake (B1) Harsh engagement (2nd -> 3rd) 1. Valve body assembly 2. C0 accumulator 3. Direct and O/D clutch (C0) Harsh engagement (3rd -> 4th) 1. Valve body assembly 2. 2nd and O/D brake (B1) Harsh engagement (4th -> 5th) 1. Valve body assembly 2. C3 accumulator 3. U/D clutch (B3) Harsh engagement (5th -> 4th) 1. Valve body assembly 2. B3 accumulator Slip or shudder (Forward and reverse: After warm-up) 1. Valve body assembly 2. Oil strainer 3. Direct and O/D clutch (C0) 4. Forward clutch (C1) 5. U/D clutch (C3) 6. 2nd and brake (B1) 7. U/D brake (B3) 8. One-way clutch No.1 (F1) 9. U/D one-way clutch (F2) 10. Torque converter clutch Slip or shudder (Particular position: Just after engine starts) Torque converter clutch Slip or shudder (R position) 1. Reverse clutch (C2) 2. 1st and reverse brake (B2) Slip or shudder (1st) 1. Forward clutch (C1) 2. One-way clutch No.1 (F1) 3. U/D one-way clutch (F2) Slip or shudder (2nd) 2nd and O/D brake (B1) Slip or shudder (3rd) Direct and O/D clutch (C0) Slip or shudder (4th) 2nd and O/D brake (B1) Slip or shudder (5th) U/D clutch (C3) Shift position too high or too low Shift solenoid valve (SLT) No engine braking (1st +- 4th: D position) U/D brake (B3) No engine braking (1st: L (1) position) 1. Valve body assembly 2. 1st and reverse brake (B2) No engine braking (2nd: 2 position) 1. Valve body assembly 2. 2nd and O/D brake (B1) No engine braking (3rd: 3 position) U/D brake (B3) No kick-down Valve body assembly Poor acceleration (All positions) 1. Shift solenoid valve (SLT) 2. Torque converter clutch Poor acceleration (5th) 1. U/D clutch (C3) 2. U/D planetary gear unit Engine stalls when starting off or stopping 1. Shift solenoid valve DSL) 2. Torque converter clutch

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1. ECM HINT: Each ECM terminal's standard voltage is shown in the table below. In the table, first follow the information under "Condition". Look under "Symbols (Terminal No.)" for the terminals to inspected. The standard voltage between the terminals is shown under "Specific Condition". Use the illustration above as a reference for the ECM terminals. *1: Shift lever with Multi-mode automatic transmission type *2: Except* 1 (Gate shift lever type) TERMINALS REFERENCE VALUE Symbols (Terminals No.) Wiring Color Terminal Description Condition Specified Condition L* 2 (E6-8) - E1 (E7-1) L - BR L shift position switch signal IG switch ON and shift lever L position 10 to 14 V IG switch ON and shift lever other than L position Below 1 V 2* 2 (E6-9) - E1 (E7-1) W - BR 2 shift position switch signal IG switch ON and shift lever 2 and L position 10 to 14 V IG switch ON and shift lever other than 2 and L position Below 1 V D* 1 (E6-10) - E1 (E7-1) BR - BR D shift position switch signal IG switch ON and shift lever D and S position 10 to 14 V IG switch ON and shift lever other than D and S position Below 1 V D* 2 (E6-10) - E1 (E7-1) BR - BR D shift position switch signal IG switch ON and shift lever D and 4 position 10 to 14 V IG switch ON and shift lever other than D and 4 position Below 1 V R (E6-11) - E1 (E7-1) G - BR R shift position switch signal IG switch ON and shift lever R position 10 to 14 V IG switch ON and shift lever other than R position Below 1 V SPD (E6-17) - E1 (E7-1) LG - BR Speed signal Vehicle speed 20 km/h (12 mph) Pulse generation (See waveform 8) STP (E6-19) - E1 (E7-1) B - BR Stop light switch signal Brake pedal is depressed 7.5 to 14 V Brake pedal is released Below 1.5 V 3*2 (E6-20) - E1 (E7-1) SB - BR 3 shift position switch signal IG switch ON and shift lever 3 position 10 to 14 V IG switch ON and shift lever other than 3 position Below 1 V SFTD* 1 (E6-21) - E1 (E7-1) Y - BR Down shift switch signal IG switch ON and shift lever S position 10 to 14 V IG switch ON and shift lever "-" position (Down shift) Below 1 V SFTU* 1 (E6-22) - E1 (E7-1) W - BR Up shift switch signal IG switch ON and shift lever S position 10 to 14 V IG switch ON and shift lever "+" position (Up shift) Below 1 V 4* 2 (E6-23) - E1 (E7-1) BR - BR 4 shift position switch signal IG switch ON and shift lever 4 position 10 to 14 V IG switch ON and shift lever other than 4 position Below 1 V S* 1 (E6-23) E1 (E7-1) SB - BR S shift position switch signal IG switch ON and shift lever S position 10 to 14 V IG switch ON and shift lever other than S position Below 1 V P (E5-6) - E1 (E7-1) L - BR Park position switch signal IG switch ON and shift lever P position 10 to 14 V IG switch ON and shift lever other then P position Below 1 V N (E5-7) - E1 (E7-1) GR - BR Neutral position switch signal IG switch ON and shift lever N position 10 to 14 V IG switch ON and shift lever other than N position Below 1 V NSW (E8-16) - E1 (E7-1) B-Y - BR Park neutral switch signal IG switch ON and shift lever P and N position Below 1 V IG switch ON and shift lever other than P and N position 10 to 14 V DSL (E9-11) - E1 (E7-1) Y-G - BR DSL solenoid signal Vehicle speed 65 km/h (40 mph), lock-up (ON to OFF) Pulse generation (See waveform 2) SR (E9-9) - E1 (E7-1) L-B - BR SR solenoid signal IG switch ON Below 1 V 3rd, 4th or 5th gear 10 to 14 V 1st or 2nd gear Below 1 V S4 (E9-10) - E1 (E7-1) L-W - BR S4 solenoid signal IG switch ON Below 1 V 5th gear 10 to 14 V Except 5th gear Below 1 V SL3+ (E9-17) - SL3- (E9-16) G-B - G-R SL3 solenoid signal Engine idle speed Pulse generation (See waveform 3) SL2+ (E9-15) - SL2- (E9-14) L-Y - L-R SL2 solenoid signal Engine idle speed Pulse generation (See waveform 4) SL1+ (E9-19) - SL1- (E9-18) R-B - B-W SL1 solenoid signal Engine idle speed Pulse generation (See waveform 5) NC+ (E9-26) - NC- (E9-34) R - W-G Speed sensor (NC) signal Vehicle speed 30 km/h (19 mph): (3rd gear) Engine speed 1,400 rpm Pulse generation (See waveform 6) NT+ (E9-27) - NT- (E9-35) W - R-W Speed sensor (NT) signal Vehicle speed 20 km/h (12mph) Pulse generation (See waveform 7) SLT+ (E9-13) - SLT- (E9-12) Y-R - Y-B SLT solenoid signal Engine idle speed Pulse generation (See waveform 1) THO1 (E9-32) - E2 (E8-28) G-Y - BR ATF temperature sensor signal ATF temperature: 115°C (239°F) or more Below 1.5 V Waveform 1 Reference: TERMINALS REFERENCE VALUE Terminal SLT+ - SLT- Tool setting 5 V/DIV, 1ms/DIV Vehicle condition Engine idle speed Waveform 2 Reference: TERMINALS REFERANCE VALUE Terminal DSL - E1 Tool setting 10 V/DIV, 100ms/DIV Vehicle condition Vehicle speed 65 km/h (40 mph), lock-up (ON to OFF) Waveform 3 Reference: TERMINALS REFERANCE VALUE Terminal SL3+ - SL3- Tool setting 5 V/DIV, 1ms/DIV Vehicle condition Engine idle speed Waveform 4 Reference: TERMINALS REFERANCE VALUE Terminal SL2+ - SL2- Tool setting 5 V/DIV, 1ms/DIV Vehicle condition Engine idle speed Waveform 5 Reference: TERMINALS REFERANCE VALUE Terminal SL1+ - SL1- Tool setting 5 V/DIV, 1ms/DIV Vehicle condition Engine idle speed Waveform 6 Reference: TERMINALS REFERANCE VALUE Terminal NC+ - NC- Tool setting 1 V/DIV, 1ms/DIV Vehicle condition Vehicle speed 30 km/h (19 mph): (3rd gear) Engine speed 1.400 rpm Waveform 7 Reference: TERMINALS REFERENCE VALUE Terminal NT+ - NT- Tool setting 5 V/DIV, 0.5ms/DIV Vehicle condition Vehicle speed 20 km/h (12 mph) Waveform 8 Reference: TERMINALS REFERANCE VALUE Terminal SPD - E1 Tool setting 5 V/DIV, 20ms/DIV Vehicle condition Vehicle speed 20 km/h (12 mph)
2. Instrument Panel Junction Block Assembly (Multiplex Network Body ECU) TERMINALS REFERANCE VALUE Symbols (Terminals No.) Wiring Color Terminal Description Condition Specified Condition SNOW (B5-17) - Body ground O - - ECT SNOW switch signal IG switch ON 10 to 14 V IG switch ON and Press continuously ECT SNOW switch Below 1 V

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1. DESCRIPTION When troubleshooting OBD II vehicles, the only difference from the usual troubleshooting procedure is to connect an OBD II scan tool complying with SAE J1987 or a intelligent tester to the vehicle, and read off various data output from the vehicle's ECM. 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 illuminating the MIL when a malfunction is detected, the applicable DTCs prescribed by SAE J2012 are recorded in the ECM memory (See DIAGNOSTIC TROUBLE CODE CHART ). If the malfunction does not occur in 3 consecutive trips, the MIL goes off but the DTCs remain in the ECM memory. To check the DTCs, connect the OBD II scan tool or intelligent tester to the DLC3 of the vehicle. The OBD II scan tool or intelligent tester also enables you to erase the DTCs and check freeze frame data and various forms of engine data (For operating instructions, see the instruction book). The DTCs include SAE controlled codes 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 DIAGNOSTIC TROUBLE CODE CHART ). The diagnosis system operates in "normal mode" during the normal vehicle use. In normal mode, "2- trip detection logic" is used to ensure accurate detection of malfunction. "Check mode" is also available to technicians as an option. In check mode, "1-trip detection logic" is used for simulating malfunction symptoms and increasing the system's ability to detect malfunctions, including intermittent malfunction. *2 trip detection logic: When a malfunction is first detected, the malfunction is temporarily stored in the ECM memory (1st trip). IF the ignition switch is turned off and then turned on (IG) again, and same malfunction is detected again, the MIL will illuminate. Freeze frame data records the engine conditions (fuel system, calculated load, engine coolant temperature, fuel trim, engine speed, vehicle speed, etc.) when a malfunction is detected. When troubleshooting, freeze frame data can help determine if the vehicle was running or stopped, if the engine was warmed up or not, if the air/fuel ratio was Lean or Rich, and other data from the time the malfunction occurred. The intelligent tester records freeze frame data in five different instance: 1) 3 times before the DTC is set, 2) once when the DTC is set, and 3) once after the DTC is set. These data can be used to simulate the vehicle's condition around the time when the malfunction occurred. The data may help find the cause of the malfunction, or judge if the DTC is being caused by temporary malfunction or not.
2. INSPECT THE DLC3 The vehicle's ECM uses ISO 15765-4for communication. The terminal arrangement of the DLC3 complies with SAE J1962 and matches the ISO 15765-14format. Terminals of DLC 3 TERMINALS REFERANCE VALUE Symbol Terminal No. Name Reference Terminal Result Condition SIL 7 Bus "+" line 5 - Signal ground Pulse generation During transmission CG 4 Chassis ground Body ground Below 1 ohms Always SG 5 Signal ground Body ground Below 1 ohms Always BAT 16 Battery positive Body ground 11 to 14 V Always CANH 6 HIGH-level CAN bus line CANL 54 to 69 ohms IG switch OFF CANH 6 HIGH-level CAN bus line Battery positive 1 Mohms or higher IG switch OFF CANH 6 HIGH-level CAN bus lineCG CG 1 kohms or higher IG switch OFF CANL 14 LOW-level CAN bus line Battery positive 1 Mohms or higher IG switch OFF CANL 14 LOW-level CAN bus line CG 1 kohms or higher IG switch OFF HINT: If your display shows UNABLE TO CONNECT TO VEHICLE when you have connected the cable of the OBD II scan tool or intelligent tester to the DLC3, turned the ignition switch to the ON position and operated the scan tool, there is a problem on the vehicle side or tool side. If the communication is normal when the tool is connected to another vehicle, inspect the DLC3 on the original vehicle. 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.
3. CHECK BATTERY VOLTAGE Measure the battery voltage. Battery voltage: 11 to 14 V If voltage is below 11 V, replace the battery before proceeding.
4. CHECK MIL The MIL comes on when the ignition switch is turned to the on position and the engine is not running. HINT: If the MIL does not light up, troubleshoot the combination meter. 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.

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1. DTC CHECK (NORMAL MODE) NOTE: 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. Checking DTCs using the OBD II scan tool or intelligent tester. Turn the ignition switch off. Connect the OBD II scan tool or intelligent tester to the DLC3. Turn the ignition switch to the on position and turn the OBD II scan tool or the intelligent tester main switch on. Select the item "DIAGNOSIS / ENHANCED OBD II / DTC INFO / CURRENT CODES". Use the OBD II scan tool or intelligent 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). NOTE: When simulating symptoms with an OBD II scan tool (excluding intelligent tester) to check the DTCs, use the normal mode. For codes on the DTCs chart which are subject to "2 trip detection logic", Turn the engine switch off after the symptom is simulated once. Then repeat the simulation process again. When the problem has been simulated twice, the MIL illuminates and the DTCs are recorded in the ECM.
2. DTC CLEAR When using the OBD II scan tool or intelligent tester: Clearing the DTCs. Connect the OBD II scan tool or intelligent tester to the DLC3. Turn the ignition switch to the on position and turn the OBD II scan tool or the intelligent tester main switch on. Select the item "DIAGNOSIS / ENHANCED OBD II / DTC INFO / CLEAR CODES [YES] button". HINT: When operating the OBD II scan tool (complying with SAE J1978) or intelligent 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 instruction.) When not using the OBD II scan tool or intelligent tester: Clearing the DTCs. Disconnect the battery terminal or remove the EFI and ETCS fuses from the engine room J/B for 60 seconds or more. However, if you disconnect the battery terminal, perform do the "INITIALIZE" (See PRECAUTION ).

DATA LIST / ACTIVE TEST

1. DATA LIST HINT: According to the DATA LIST displayed by the intelligent 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. NOTE: In the table below, the values listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whether a part is faulty or not. Warm up the engine. Turn the ignition switch off. Connect the intelligent tester together with the CAN VIM (controller area network vehicle interface module) to the DLC3. Turn the ignition switch to the on position. Turn on the tester. Select the item "DIAGNOSIS / ENHANCED OBD II / DATA LIST". According to the display on the tester, read the "DATA LIST". HINT: *1: Gate shift lever type only *2: Shift lever with Multi-mode automatic transmission only SWITCH STATUS REFERANCE Item Measurement Item/Range (display) Normal Condition Diagnostic Note STOP LIGHT SW Stop light switch Status/ON or OFF Brake Pedal is depressed: ON Brake Pedal is released: OFF - PNP SW [NSW] PNP switch Status/ON or OFF Shift lever position is; P and N: ON Except P and N: OFF When the shift lever position displayed on the Intelligent tester differs from the actual position, adjustment of the PNP switch or the shift cable may be incorrect. HINT: When the failure still occurs even after adjusting these parts, See DTC P0705 Transmission Range Sensor Circuit Malfunction (PRNDL Input) REVERSE PNP switch Status/ON or OFF Shift lever position is; R: ON Except R: OFF DRIVE PNP switch Status/ON or OFF Shift lever position is; D, 4* 1 and S* 2 : ON Except D, 4* 1 and S* 2 : OFF 4TH/DRIVE* 1 PNP SW Status/ ON or OFF Shift lever position is; 4: ON Except 4: OFF 3RD* 1 PNP SW Status/ ON or OFF Shift lever position is; 3: ON Except 3: OFF 2ND* 1 PNP SW Status/ ON or OFF Shift lever position is; 2 and L: ON Except 2 and L: OFF LOW* 1 PNP SW Status/ ON or OFF Shift lever position is; L: ON Except L: OFF SHIFT Actual Gear Position/1st, 2nd, 3rd, 4th or 5th Shift Lever Position is; L* 1 : 1st 2* 1 : 1st or 2nd 3* 1 : 1st, 2nd or 3rd 4* 1 : 1st, 2nd, 3rd or 4th D: 1st, 2nd, 3rd, 4th or 5th S* 2 : 1st, 2nd, 3rd, 4th or 5th - LOCK UP SOL Lock Up Solenoid Status/ON or OFF Lock Up: ON Except Lock Up: OFF - SOLENOID (SLT) Shift Solenoid SLT Status/ON or OFF Accelerator pedal is depressed: OFF Accelerator pedal is released: ON - AT FLUID TEMP ATF Temp. Sensor Value/min.: -40°C (-40°F) max.: 215°C (419°F) After Stall Test; Approx. 80°C (176°F) Equal to ambient temperature when cold soak If the value is "-40°C (-40°F)" or "215°C (419°F)", ATF temp. sensor circuit is opened or shorted. SPD (NC) Counter Gear Speed/display: 50 r/min HINT: 3rd when shift lever position is D position (After warming up the engine); Intermediate shaft speed (NC) becomes close to the engine speed. - SNOW SW Pattern SW (ECT SNOW) status/ON or OFF Engine switch ON: OFF then Pattern switch (ECT SNOW) Push: ON then Pattern switch (ECT SNOW) Push: OFF
2. ACTIVE TEST HINT: Performing the ACTIVE TEST using the intelligent 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 intelligent tester together with the CAN VIM (controller area network vehicle interface module) to the DLC3. Turn the ignition switch to the ON position. Push the "ON" button of the intelligent tester. Select the item "DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST". According to the display on tester, perform the "ACTIVE TEST". 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] IDL: ON Less than 50 km/h (31 mph) [Others] Press "-->" button: Shift up Press "-->" button: Shift down Possible to check the operation of the shift solenoid valves. LOCK UP [Test Details] Control the shift solenoid SLU to set the automatic transaxle to the lock-up condition. [Vehicle Condition] Throttle valve opening angle: Less than 35 % Vehicle Speed: 60 km/h (37 mph) or more, and 6th gear Possible to check the DSL operation. LINE PRESS UP (1) [Test Details] Operate the shift solenoid SLT and raise the line pressure. [Vehicle Condition] Vehicle Stopped. IDL: ON HINT: OFF: Line pressure up (When the active test of "LINE PRESS UP" is performed, the ECM commands the SLT solenoid to turn off). ON: No action (normal operation) - (1) "LINE PRESS UP" in the ACTIVE TEST is performed to check the line pressure changes by connecting the SST to the automatic transaxle, which is used in the HYDRAULIC TEST as well. HINT: The pressure values in ACTIVE TEST and HYDRAULIC TEST are different from each other.

DIAGNOSTIC TROUBLE CODE CHART

If a DTC is displayed during the DTC check, check the parts listed in the table below and proceed to the link given.

HINT

1. *1: Comes on MIL (Malfunction Indicator Lamp) light up
2. *2: "DTC stored" mark means ECM memorizes the malfunction code if the ECM detects the DTC detection condition.
3. This DTC may be output when the clutch, brake and gear components etc. inside the automatic transmission are damaged.

AUTOMATIC TRANSMISSION SYSTEM

DTC REFERANCE

INSPECTION PROCEDURE

HINT

According to the DATA LIST displayed by the OBD II scan tool or intelligent 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.

Note. In the table below, the value listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whether apart is faulty or not.

1. READ DATA LIST Warm up the engine. Turn the ignition switch off. Connect the OBD II scan tool or intelligent tester to the DLC3. Turn the ignition switch to the on position. Turn on the tester. Select the item "DIAGNOSIS / ENHANCED OBD II / DATA LIST". According to the display on the tester, read the "DATA LIST". DATA LIST Item Measurement Item/Range (display) Normal Condition AT FLUID TEMP ATF Temp. Sensor Value/min.: -40°C (-40°F) max.: 215°C (419°F) Approx. 80°C (176°F) (After Stall Test) HINT: When DTC P0712 is output and OBD II scan tool or intelligent tester output is 150°C (302°F), there is a short circuit. When DTC P0713 is output and OBD II scan tool or intelligent tester output is -40°C (-40°F), there is an open circuit. Measure the resistance between terminal THO1 (THO) and body ground.

TEMPERATURE DISPLAY FUNCTION

HINT

If a circuit related to the ATF temperature sensor become open, P0713 is immediately set (in 0.5 second).

When P0713 is set, P0711 cannot be detected.

It is not necessary to inspect the circuit when P0711 is set.

Scheme 569

Scheme 570

1. INSPECT TRANSMISSION WIRE (ATF TEMPERATURE SENSOR) Disconnect the transmission wire connector from the transaxle. Measure the resistance according to the value(s) in the table below. Resistance TESTER CONNECTION AND SPECIFIED CONDITION Tester Connection Specified Condition 1 (THO) - 7 (E2) 79 ohms to 156 kohms 1 (THO) - Body ground 10 kohms or higher 7 (E2) - Body ground HINT: If the resistance is out of the specified range with either the ATF temperature shown in the table below, the driveability of the vehicle may decrease. ATF TEMPERATURE ATF Temperature Specified Condition 20°C (68°F) 3 to 4 kohms 110°C (230°F) 0.22 to 0.28 kohms NG: REPAIR OR REPLACE TRANSMISSION WIRE OK: Go to next step
2. CHECK HARNESS AND CONNECTOR (TRANSMISSION WIRE - ECM) Connect the transmission wire connector to the transaxle. Disconnect the ECM connectors. Measure the resistance according to the value(s) in the table below. Resistance TESTER CONNECTION AND SPECIFIED CONDITION Tester Connection Specified Condition E9 - 32 (THO1) - E8 - 28 (E2) 79 ohms to 156 kohms Measure the resistance according to the value(s) in the table below. Resistance (Check for short) TESTER CONNECTION AND SPECIFIED CONDITION Tester Connection Specified Condition E9 - 32(THO1) - Body ground 10 kohms or higher E8 - 28 (E2) - Body ground NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: REPLACE ECM

HINT

According to the DATA LIST displayed by the OBD II scan tool or intelligent 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.

Note. In the table below, the value listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whether apart is faulty or not.

1. READ DATA LIST Warm up the engine. Turn the ignition switch off. Connect the OBD II scan tool or intelligent tester to the DLC3. Turn the ignition switch to the on position. Turn on the tester. Select the item "DIAGNOSIS / ENHANCED OBD II / DATA LIST". According to the display on the tester, read the "DATA LIST". DATA LIST Item Measurement Item/Range (display) Normal Condition AT FLUID TEMP ATF Temp. Sensor Value/min.: -40°C (-40°F) max.: 215°C (419°F) Approx. 80°C (176°F) (After Stall Test) HINT: When DTC P0712 is output and OBD II scan tool or intelligent tester output is 150°C (302°F), there is a short circuit. When DTC P0713 is output and OBD II scan tool or intelligent tester output is -40°C (-40°F), there is an open circuit. Measure the resistance between terminal THO1 (THO) and body ground.

TEMPERATURE DISPLAY FUNCTION

HINT

If a circuit related to the ATF temperature sensor becomes open, P0713 is immediately set (in 0.5 second).

When P0713 is set, P0711 cannot be detected.

It is not necessary to inspect the circuit when P0711 is set.

1. CHECK OTHER DTCS OUTPUT (IN ADDITION TO DTC P0711) Connect the OBD II scan tool or the intelligent tester to the DLC3. Turn the ignition switch to the on position and push the OBD II scan tool or the intelligent tester main switch ON. When you use intelligent tester: Select the item "DIAGNOSIS / ENHANCED OBD II / DTC INFO / CURRENT CODES". Read the DTCs using the OBD II scan tool or the intelligent tester. Result TEMPERATURE DISPLAY FUNCTION Display (DTC output) Proceed to Only "P0711" is output A "P0711" and other DTCs B HINT: If any other codes besides "P0711" are output, perform troubleshooting for those DTCs first. B: GO TO DTC CHART A: Go to next step
2. CHECK TRANSMISSION FLUID LEVEL OK: Automatic transmission fluid level is correct. NG: ADD FLUID OK: REPLACE TRANSMISSION WIRE (ATF TEMPERATURE SENSOR)

1. PERFORM ACTIVE TEST Warm up the engine. Turn the ignition switch off. Connect the intelligent tester to the DLC3. Turn the ignition switch to the on position. Turn on the tester. Select the item "DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST". According to the display on the tester, perform the "ACTIVE TEST". TYPICAL MALFUNCTION THRESHOLDS Item Test Details Diagnostic Note LOCK UP [Test Details] Control the shift solenoid DSL to set the automatic transaxle to the lock-up condition. [Vehicle Condition] Vehicle Speed: 60 km/h (37 mph) or more Possible to check the DSL operation. HINT: This test can be conducted when the vehicle speed is 60 km/h (37 mph) or more. This test can be conducted in 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.)

Scheme 571

Scheme 572

Scheme 573

Scheme 574

1. CHECK OTHER DTCS OUTPUT (IN ADDITION TO DTC P0741) Connect the OBD II scan tool or the intelligent tester to the DLC3. Turn the ignition switch to the on position and turn the OBD II scan tool or the intelligent tester main switch ON. When you use intelligent tester: Select the item "DIAGNOSIS / ENHANCED OBD II / DTC INFO / CURRENT CODES". Read the DTCs using the OBD II scan tool or the intelligent tester. Result: RESULT REFERANCE CHART Display (DTC output) Proceed to Only "P0741" is output A "P0741" and other DTCs B HINT: If any other codes besides "P0741" are output, perform the troubleshooting for those DTCs first. B: GO TO DTC CHART A: Go to next step
2. INSPECT TRANSMISSION WIRE (DSL) Disconnect the transmission wire connector from the transaxle. Measure the resistance according to the value(s) in the table below. Resistance TESTER CONNECTION AND SPECIFIED CONDITION Tester Connection Specified Condition 20°C (68°F) 10 - Body ground 11 to 13 ohms NG: Go to step 4 OK: Go to next step
3. CHECK HARNESS AND CONNECTOR (TRANSMISSION WIRE - ECM) Connect the transmission wire connector. Disconnect the ECM connector. Measure the resistance according to the value(s) in the table below. Resistance TESTER CONNECTION AND SPECIFIED CONDITION Tester Connection Specified Condition 20°C (68°F) E9 - 11 (DSL) - Body ground 11 to 13 ohms NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
4. INSPECT SHIFT SOLENOID VALVE (DSL) Remove the shift solenoid valve DSL. Measure the resistance according to the value(s) in the table below. Resistance TESTER CONNECTION AND SPECIFIED CONDITION Tester Connection Specified Condition 20°C (68°F) Solenoid Connector (DSL) - Solenoid Body (DSL) 11 to 13 ohms Connect the positive (+) lead to the terminal of the solenoid connector, and the negative (-) lead to the solenoid body. OK: The solenoid valve makes an operating sound. NG: REPLACE SHIFT SOLENOID VALVE (DSL) OK: Go to next step
5. CHECK TRANSMISSION WIRE OK: The connectors and pins are securely installed. There is no open or short on the wire harness. NG: REPAIR OR REPLACE TRANSMISSION WIRE OK: Go to next step
6. INSPECT TRANSMISSION VALVE BODY ASSEMBLY OK: There are no foreign objects on each valve and they operate smoothly. NG: REPAIR OR REPLACE TRANSMISSION VALVE BODY ASSEMBLY OK: Go to next step
7. INSPECT TORQUE CONVERTER CLUTCH ASSEMBLY OK: The torque converter clutch operates normally. NG: REPLACE TORQUE CONVERTER CLUTCH ASSEMBLY OK: REPAIR AUTOMATIC TRANSAXLE ASSEMBLY

HINT

According to the DATA LIST displayed by the OBD II scan tool or intelligent 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.

Scheme 575

Scheme 576

Scheme 577

1. READ DATA LIST Warm up the engine. Turn the ignition switch off. Connect the OBD II scan tool or intelligent tester to the DLC3. Turn the ignition switch to the on position. Turn on the tester. Select the item "DIAGNOSIS / ENHANCED OBD II / DATA LIST". According to the display on the tester, read the "DATA LIST". DATA LIST Item Measurement Item/Range (display) Normal Condition SPD (NC) Counter Gear Speed/display: 50 r/min [HINT] 3rd when shift lever position is D position (After warming up the engine); Intermediate shaft speed (NC) becomes close to the engine speed. HINT: SPD (NC) is always 0 while driving: Open or short in the sensor or circuit. SPD (NC) 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. INSPECT SPEED SENSOR INSTALLATION Check the speed sensor installation. OK: The installation bolt is tightened properly and there is no clearance between the sensor and transaxle case. NG: REPLACE SPEED SENSOR (NC) OK: Go to next step INSPECT SPEED SENSOR (NC) Disconnect the speed sensor connector from the transaxle. Measure the resistance according to the value(s) in the table below. Resistance: TOYOTA made TESTER CONNECTION AND SPECIFIED CONDITION Tester Connection Specified Condition 20 °C (68 °F) 1 - 2 500 to 620 ohms Resistance: AISIN made TESTER CONNECTION AND SPECIFIED CONDITION Tester Connection Specified Condition 20 °C (68 °F) 1 - 2 560 to 680 ohms NG: REPLACE SPEED SENSOR (NC) OK: Go to next step CHECK HARNESS AND CONNECTOR (SPEED SENSOR - ECM) Connect the speed sensor connector. Disconnect the ECM connector. Measure the resistance according to the value(s) in the table below. Resistance: TOYOTA made TESTER CONNECTION AND SPECIFIED CONDITION Tester Connection Specified Condition 20 °C (68 °F) E9 - 26 (NC+) - E9 - 34 (NC-) 500 to 620 ohms Resistance: AISIN made TESTER CONNECTION AND SPECIFIED CONDITION Tester Connection Specified Condition 20 °C (68 °F) E9 - 26 (NC+) - E9 - 34 (NC-) 560 to 680 ohms Measure the resistance according to the value(s) in the table below. Resistance (Check for short) TESTER CONNECTION AND SPECIFIED CONDITION Tester Connection Specified Condition E9 - 26 (NC+) - Body ground 10 kohms or higher E9 - 34 (NC-) - Body ground NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: REPLACE ECM