Automatic Transmission Control System - Diagnostics: Pre-Check

DIAGNOSIS SYSTEM
1. Description
  - When troubleshooting On-Board Diagnostic (OBD II) vehicles, the vehicle must be connected to the OBD II scan tool (in compliance with SAE J1978) or the hand-held tester. Various data input from the vehicle's ECM can then be read.
  - OBD II regulations require that the vehicle's onboard computer illuminates the Malfunction Indicator Lamp (MIL) on the instrument panel when the computer detects a malfunction in: 1) the computer, or 2) drive system components (which affect the vehicle emissions). In addition, the applicable DTCs prescribed by the SAE J2012 are recorded in the ECM memory (see DIAGNOSTIC TROUBLE CODE CHART and DIAGNOSTIC TROUBLE CODE CHART ).
    If the malfunction only occurs in 3 trips, the MIL turns off but the DTCs remain recorded in the ECM memory.
    
    Fig 1: Checking Malfunction Indicator Lamp
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  - To check DTCs, connect the OBD II scan tool or hand-held tester to the Data Link Connector 3 (DLC3) on the vehicle. The OBD II scan tool or hand-held tester also enables you to erase the DTCs and check the freeze frame data and various forms of engine data (see the instruction manual for the OBD II scan tool or hand-held tester).
    The DTCs include the SAE controlled codes and the manufacturer controlled codes.
    
    The SAE controlled codes must be set according to the SAE, while the manufacturer controlled codes can be set by a manufacturer (see the DTC chart DIAGNOSTIC TROUBLE CODE CHART ).
    
    Fig 2: Connecting Hand-Held Tester To DLC3
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  - The diagnosis system operates in "normal mode" during normal vehicle use. In "normal mode", 2 trip detection logic^* is used to ensure accurate detection of malfunctions. A "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 malfunctions (hand-held tester only) (see PRE-CHECK ).
  When a malfunction is first detected, the malfunction is temporarily stored in the ECM memory (1st trip). If the ignition switch turned OFF and then ON again, and the same malfunction is detected again, the MIL will illuminated (2nd trip).
2. Inspect the DLC3.
  The vehicle's ECM uses ISO 9141-2 for communication protocol. The terminal arrangement of the DLC3 complies with SAE J1962 and matches the ISO 9141-2 format.
  
  Fig 3: Identifying DLC3 Connector
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Fig 4: Terminal Specification Table
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
HINT:

Connect the cable of the OBD II scan tool of the hand-held tester to the DLC3, turn the ignition switch ON and attempt to use the OBD II scan tool or the hand-held tester If the screen displays UNABLE TO CONNECT TO VEHICLE, a problem exists in the vehicle side or the tester side.
- If communication is normal when the scan tool or the hand-held tester is connected to another vehicle, inspect the DLC3 on the original vehicle.
- If communication is still impossible when the scan tool or the hand-held tester is connected to another vehicle, the problem is probably in the scan tool or the hand-held tester itself. Consult the Service Department listed in the tester's instruction manual.
INSPECT DIAGNOSIS (NORMAL MODE)
1. Check the MIL.
  1. The MIL turns on when the ignition switch is turned ON and the engine is not running.
    HINT:
    
    If the MIL does not turn on, troubleshoot the combination meter (see COMBINATION METER ).
  2. When the engine is started, the MIL should turn off. If the lamp remains on, the diagnosis system has detected a malfunction or an abnormality in the system.
  Fig 5: Checking Malfunction Indicator Lamp
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Check the DTC.
  NOTE: Hand-held tester only:
  When the diagnosis system is changed from normal mode to check mode or vice-versa, all DTCs and freeze frame data recorded in normal mode will be erased. Before changing modes, always check and make a note of DTCs and freeze frame data.
  1. Prepare an OBD II scan tool (complying with SAE J1978) or hand-held tester.
  2. Connect the OBD II scan tool or hand-held tester to the DLC3 at the lower of the instrument panel.
  3. Turn the ignition switch ON and press the OBD II scan tool or hand-held tester switch ON.
    
    Fig 6: Connecting Hand-Held Tester To DLC3
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  4. Select the item "DIAGNOSIS /ENHANCED OBD II/ DTC INFO/CURRENT CODES".
  5. Use the OBD II scan tool or hand-held tester to check the DTCs and freeze frame data and make a note of them (see the instruction manual for the OBD II scan tool or the hand-held tester).
  6. See DIAGNOSTIC TROUBLE CODE CHART to confirm the details of the DTCs.
  NOTE: When simulating symptoms with the OBD II scan tool (excluding the hand-held tester) to check for DTCs, use normal mode. For DTCs subject to "2 trip detection logic", turn the ignition switch OFF after the symptom is simulated the 1st time. Then repeat the simulation process again. When the problem has been simulated twice, the MIL illuminates on the instrument panel and DTCs are recorded in the ECM.
3. Clear the DTC.
  When using the OBD II scan tool or hand-held tester: Operate the OBD II scan tool or hand-held tester to erase the DTC and freeze frame data (see the instruction manual for the OBD II scan tool or hand-held tester).
  
  HINT:
  
  Erase DTCs and freeze frame data with the OBD II scan tool (complying with SAE J1978) or the hand-held tester (see the OBD II scan tool's instruction manual for operating procedures).
4. Clear the DTC
  When not using the OBD II scan tool or hand-held tester: Disconnect the battery negative (-) terminal or remove the EFI No. 1 and ETCS fuses from the engine room J/B for 60 seconds or more. When disconnecting the battery terminal, perform the "INITIALIZE" procedure.
INSPECT DIAGNOSIS (CHECK MODE)
HINT:

Hand-held tester only:

Check mode has a higher sensitivity to malfunctions and can detect malfunctions that normal mode cannot detect. Check mode can also detect all the malfunctions that normal mode can detect.
1. Check the DTC.
  1. Check the initial conditions.
    - Battery positive voltage 11 V or more
    - Throttle valve fully closed
    - Transmission in the P position
    - Air conditioning switched OFF
  2. Turn the ignition switch OFF.
  3. Connect the hand-held tester to the DLC3.
  4. Turn the ignition switch ON and push the hand-held tester main switch ON.
  5. Prepare the hand-held tester.
    
    Fig 7: Connecting Hand-Held Tester To DLC3
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  6. Change the ECM to check mode with the hand-held tester. Make sure the MIL flashes as shown in the illustration.
    NOTE: All DTCs and freeze frame data recorded will be erased if: 1) the hand-held tester is used to change the ECM from normal mode to check mode or vise-versa; or 2) during check mode, the ignition switch is turned from ON to ACC or OFF.
    
    Fig 8: Checking ECM Mode
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  7. Start the engine. The MIL should turn off after the engine starts.
  8. Ciliate the conditions of the malfunction described by the customer.
  9. After simulating the malfunction conditions, use the hand-held tester diagnosis selector to check the DTCs, freeze frame data, and other data.
  10. After checking the DTC, inspect the applicable circuit.
2. Clear the DTC.
  Operate the OBD II scan tool or the hand-held tester to erase the DTC and freeze frame data (see the instruction manual for the OBD II scan tool or the hand-held tester).
DATA LIST
HINT:

Using the hand-held tester or the OBD II scan tool DATA LST allows switch, sensor, actuator and other item values to be read without removing any parts. Reading the DATA LIST early in troubleshooting is one way to shorten labor time.
1. Warm up the engine.
2. Turn the ignition switch OFF.
3. Connect the hand-held tester or the OBD II scan tool to the DLC3.
4. Turn the ignition switch ON.
5. Turn ON the hand-held tester or the OBD II scan tool.
6. When using the hand-held tester:
  Enter the following menus: DIAGNOSIS / ENHANCED OBD II / DATA LIST.
7. According to the display on tester, read the DATA LIST.
Fig 9: Range Normal Condition Data List (1 Of 2)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 10: Range Normal Condition Data List (2 Of 2)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
ACTIVE TEST
HINT:

Performing the hand-held tester ACTIVE TEST allows relay, VSV, actuator and other items to be operated without removing any parts. Performing the ACTIVE TEST early in troubleshooting is one way to shorten labor time. The DATA LIST can be displayed during the ACTIVE TEST.
1. Warm up the engine.
2. Turn the ignition switch OFF.
3. Connect the hand-held tester to the DLC3.
4. Turn the ignition switch ON.
5. Turn ON the hand-held tester.
6. Enter the following menus: DIAGNOSIS / ENHANCED OBD II /ACTIVE TEST.
7. According to the display on tester, perform the ACTIVE TEST.
Fig 11: Tester Display
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Then, perform " LINE PRESS UP" in ACTIVE TEST to check the line pressure changes.

HINT:

The pressure values in ACTIVE TEST and HYDRAULIC TEST are different from each other.
DEFINITION OF TERMS

Fig 12: Term & Definition Chart
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

TOYOTA/LEXUS PART AND SYSTEM NAME LIST

This reference list indicates the part's names used in this manual along with their definitions.

NAME & DEFINITION SPECIFICATION

TOYOTA/LEXUS name	Definition
TOYOTA HCAC system, Hydro Carbon Absorptive Catalyst (HCAC) system, HC absorptive three-way catalyst	HC absorptive 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-board 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
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

The monitor will run whenever the following DTCs are not present (Monitor disablement List)
HINT:

This table indicates the 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.

Fig 13: Monitor Disablement List (1 Of 6)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 14: Monitor Disablement List (2 Of 6)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 15: Monitor Disablement List (3 Of 6)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 16: Monitor Disablement List (4 Of 6)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 17: Monitor Disablement List (5 Of 6)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 18: Monitor Disablement List (6 Of 6)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
PROBLEM SYMPTOM CONFIRMATION
For analysis of a customer problem, try to reproduce the symptoms.

If the problem is that the transaxle does not up-shift, down-shift, 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.
ROAD TEST
NOTE: Perform the test at the Automatic Transmission Fluid (ATF) 50 to 80°C (122 to 176°F) in the normal operation.
1. D position test:
  Move the shift lever into the D position and fully depress the accelerator pedal to check the following points.
  1. Check the up-shift operation.
    Check if 1 --> 2, 2 --> 3 and 3 --> O/D up-shifts take place and if the shift points conform to the automatic shift schedule (see SERVICE DATA ).
    
    HINT:
    - O/D Gear Up-shift Prohibition Control (1. Coolant temperature is 60°C (140°F) or less. 2. There is a 10 km/h (6 mph) difference between the set speed of the cruise control and the actual vehicle speed.)
    - O/D Gear Lock-up Prohibition Control (1. Brake pedal is depressed. 2. Coolant temperature is 60°C (140 °F) or less.)
  2. Check for abnormal shock and slip at the up-shifts.
  3. Check for abnormal noises and vibration.
    Drive in the D position lock-up and the O/D gear to check for abnormal noises and vibration.
    
    HINT:
    
    Check the cause of abnormal noises and vibration very thoroughly as it could be due to loss of balance in the differential or torque converter clutch, etc.
  4. Check the kick-down operation.
    While driving the vehicle in the D position, 2nd, 3rd or O/D gears, check if the 2 --> 1, 3 --> 2, and O/D --> 3 kick-downs take place and if the shift points conform to the automatic shift schedule (see SERVICE DATA ).
  5. Check for abnormal shock and slip at the kick-downs.
  6. Check the lock-up mechanism.
    - Drive the vehicle in the D position or O/D gear, at a steady speed (lock-up ON) of about 70 km/h (43 mph).
    - Lightly depress the accelerator pedal and check that the engine speed does not change abruptly.
  If there is a big jump in the engine speed, there is no lock-up.
2. 2 position test:
  Move the shift lever into the 2 position and fully depress the accelerator pedal to check the following points.
  1. Check the up-shift operation.
    Check if the 1 --> 2 up-shift takes place and if the shift point conforms to the automatic shift schedule (see SERVICE DATA ).
    
    HINT:
    
    There is no O/D up-shift and lock-up in the 2 position.
  2. Check the engine braking.
    While driving the vehicle in the 2 position and 2nd gear, release the accelerator pedal and check the engine braking effect.
  3. Check for abnormal noises during acceleration and deceleration, and for abnormal shock at the up-shift and the down-shift.
3. L position test:
  Move the shift lever into the L position and fully depress the accelerator pedal to check the following points.
  1. Check that there is no up-shift.
    While running the vehicle in the L position, check that there is no up-shift to the 2nd gear.
  2. Check the engine braking.
    While running the vehicle in the L position, release the accelerator pedal and check the engine braking effect.
  3. Check for abnormal noises during acceleration and deceleration.
4. R position test:
  Move the shift lever into the R position and lightly depress the accelerator pedal and check that the vehicle moves backward without any abnormal noise or vibration.
  
  CAUTION: Before conducting this test, ensure that the test area is free from people and obstruction.
5. P position test:
  Stop the vehicle on a grade (more than 5°). After shifting into the P position, release the parking brake. Then, check if the parking lock pawl holds the vehicle in place.
BASIC INSPECTION
1. Check the fluid level.
  HINT:
  - Drive the vehicle until the engine and transmission become the normal operating temperature.
    Normal operating temperature
    
    (Fluid temperature): 70 to 80°C (158 to 176°F)
  - Only use the COOL range on the dipstick as a rough reference when the ATF is replaced or the engine does not run.
  1. Park the vehicle on a level surface and apply the parking brake.
  2. With the engine idling and the brake pedal depressed, shift the shift lever into all positions from P to L and put it back to the P position.
  3. Pull out the dipstick and wipe it clean.
  4. Push it back fully into the pipe.
  5. Pull it out and check that the fluid level is in the HOT range.
  Fig 19: Checking Fluid Level
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  If the level is not within the range, add new ATF.
  
  ATF: T-IV
  
  NOTE: Do not overfill.
2. Check the ATF condition.
  If the ATF smells burnt or the color is black, replace it.
3. Replace the ATF.
  1. Remove the drain plug and drain the ATF.
  2. Reinstall the drain plug securely.
    
    Fig 20: Replacing Drain Plug
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. With the engine stopped, add new ATF through the oil filler pipe.
    ATF: T-IV
    
    Capacity: 2.2 liters (2.3 US qts, 2.0 lmp. qts)
  4. Start the engine and move the shift lever into all positions from P to L, and then move it into the P position.
    
    Fig 21: Adding ATF Through Oil Filler Pipe
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  5. With the engine idling, check the fluid level. Add fluid up to the COOL level on the dipstick.
  6. Check the fluid level at the normal operating temperature, 70 to 80°C (158 to 176°F), and add if necessary.
  Fig 22: Checking Fluid Level
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  NOTE: Do not overfill.
4. Check the fluid leaks.
  If there are leaks, it is necessary to repair or replace the O-rings, the gasket, the oil seals, the plugs or the other parts.
5. Inspect and adjust the shift lever position.
  When moving the shift lever from the N position to the other positions, check that the lever can be shifted smoothly and accurately to each position and that the position indicator correctly indicates the position.
  
  If the indicator is not aligned with the correct position, carry out the following adjustment procedures.
  1. Loosen the nut on the control shaft lever.
  2. Push the control shaft fully rearward.
  3. Return the control shaft lever by 2 notches.
  4. Move the shift lever to the N position.
  5. While holding the shift lever lightly toward the R position, adjust the control lever nut.
  6. Tighten the control shaft lever nut.
    
    Fig 23: Locating Control Shaft Lever Nut
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  7. Start the engine and make sure that the vehicle moves forward when moving the shift lever from the N to P position, and rearward when moving the shift lever to the R position.
  Torque: 12.5 N.m (130 kgf.cm, 9 ft.lbf)
6. Inspect and adjust the park/neutral position.
  If the engine does not start at the P and N positions, carry out the following adjustment procedure.
  1. Loosen the park/neutral position switch bolt and move the shift lever to the N position.
    
    Fig 24: Aligning Neutral Position And Groove
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. Align the groove with the neutral basic line.
  3. Tighten the bolt at the position.
  Torque: 13 N.m (130 kgf.cm, 10 ft-lbf)
  1. For further inspection of the park/neutral position switch (See DTC P0705: TRANSMISSION RANGE SENSOR CIRCUIT MALFUNCTION (PRNDL INPUT); DTC P0850: * PARK/NEUTRAL SWITCH INPUT CIRCUIT ).
7. Check the idle speed.
  Connect the OBD II scan tool or the hand-held tester to the DLC3 and inspect the idle speed.
  
  Idle speed: 700 +/- 50 rpm (in the N position and air conditioner OFF)
Fig 25: Connecting Hand-Held Tester To DLC3
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
MECHANICAL SYSTEM TESTS
1. Check the stall speed.
  This test checks the overall performance of the transmission and engine by measuring the stall speed in the D and R positions.
  NOTE:
  - Perform the test at the normal operating temperature of the ATF: 50 to 80°C (122 to 176°F).
  - Do not run this test continuously for more than 5 seconds.
  - To ensure safety, perform this test in a wide, clear and level area which provides good traction.
  - The test should always be carried out in pairs. One technician should observe the conditions of the wheels or chocks outside the vehicle while the other is performing the test.
  1. Chock the 4 wheels.
  2. Connect the scan tool (OBD II scan tool or the hand-held tester) to the DLC3.
  3. Fully apply the parking brake.
  4. Keep the brake pedal depressed firmly with your left foot.
  5. Start the engine.
  6. Move the shift lever into the D position. Fully depress all the way down the accelerator pedal with your right foot. Quickly read the stall speed at this time.
    Stall speed: 2,250 +/- 150 rpm
  7. Conduct the same test in the R position.
    Stall speed: 2,250 +/- 150 rpm
  Evaluation:
  
  Fig 26: Problem Cause Specification Chart (1 Of 3)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the time lag.
  When the shift lever is moved while the engine is idling, there will be a certain time lapse or time lag before the shock can be felt. This is used for checking the condition of the O/D direct clutch, the forward clutch, and the 1st and reverse brake.
  NOTE:
  - Conduct the test at the normal operating temperature of the ATF: 50 to 80°C (122 to 176°F).
  - Be sure to allow 1 minute interval between the tests.
  - Perform measurement 3 times and take the average value.
  1. Connect the OBD II scan tool or the hand-held tester to the DLC3.
  2. Fully apply the parking brake.
  3. Start the engine and check the idle speed.
    Idle speed: 700 Ω 50 rpm (in the N position and the air conditioner OFF)
  4. Move the shift lever from the N to D position. Using a stop watch, measure the time from the lever is moved until the shock is felt.
    Time lag at N to D: Less than 1.2 seconds
  5. In the same manner, measure the time lag at N to R.
    Time lag at N to R: Less than 1.5 seconds
  Evaluation (if the N to D or N to R is longer than that specified):
Fig 27: Problem Cause Specification Chart (2 Of 3)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

HYDRAULIC TEST

Measure the line pressure.

NOTE:

Perform the test at the normal operating temperature of the ATF: 50 to 80°C (122 to 176°F).
The line pressure test should always be carried out in pairs. One technician should observe the conditions of the wheels or chocks outside the vehicle while the other is conducting the test.
Be careful to prevent the SST's hose from interfering with the exhaust pipe.

Warm up the ATF.
Remove the test plug on front left side of the transmission case front left side and connect the SST.
SST 09992-00095 (09992-00151, 09992-00271)
Fully apply the parking brake and chock the 4 wheels.
Start the engine and check the idle speed.
Keep the brake pedal depressed firmly with your left foot.
Measure the line pressure while the engine is idling.
Depress the accelerator pedal all the way down. Quickly read the highest line pressure when the engine speed reaches the specified stall speed (in the mechanical system tests).
NOTE: Release the accelerator pedal and perform a stop test if the rear wheels begin to rotate before the engine speed reaches the specified stall speed.
In the same manner, perform the test in the R position.

Specified line pressure (5VZ-FE):

CONDITION & POSITION SPECIFICATION

Condition	D Position	R Position
Idling	380 to 440 kPa (3.9 to 4.5 kgf/cm² , 51 to 64 psi)	600 to 695 kPa (6.1 to 7.1 kgf/cm² , 87 to 101 psi)
Stall	1,090 to 1,225 kPa (11.1 to 12.5 kgf/cm² , 158 to 178 psi)	1,460 to 1,795 kPa (14.9 to 18.3 kgf/cm² , 212 to 260 psi)

Specified line pressure (2UZ-FE):

CONDITION & POSITION SPECIFICATION

Condition	D Position	R Position
Idling	480 to 540 kPa (4.9 to 5.5 kgf/cm² , 70 to 78 psi)	695 to 795 kPa (7.1 to 8.1 kgf/cm² , 101 to 115 psi)
Stall	1,360 to 1,500 kPa (13.9 to 15.3 kgf/cm² , 197 to 21 8 psi)	1,735 to 2,070 kPa (17.7 to 21.1 kgf/cm² , 252 to 300 psi)

If the measured pressures are not up to the specified values, recheck the throttle cable adjustment and retest.

Evaluation

Fig 28: Problem Causes Specification Chart (3 Of 3)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

MANUAL SHIFTING TEST

HINT:

With this test, if the trouble occurs in the electrical circuit or there is a mechanical problem in the transmission can be determined.

Disconnect the solenoid wire.

Inspect the manual driving operation.

Check that the shift and gear positions correspond to the table below.

SHIFT & GEAR POSITION

Shift Position	Gear Position
D	O/D
2	3rd
L	1st
R	Reverse
P	Pawl Lock

Fig 29: Locating Solenoid Wire

HINT:

If the L, 2 and D and the gear positions are difficult to be distinguished, perform the manual shifting test. While driving, move the shift lever through the L, 2 and D positions. Check that the changed gear corresponds to the shift position.

If any abnormality is found during the manual shifting test, the problem is in the transmission itself.

Connect the solenoid wire.
Clear the DTC (see PRE-CHECK ).

RESET MEMORY
CAUTION: Perform the RESET MEMORY (AT initialization) when replacing the automatic transaxle assembly, engine assembly or the ECM.

NOTE: Hand-held tester only

HINT:

The ECM memorizes the condition that the ECM controls the automatic transaxle assembly and engine assembly according to their characteristics. Therefore, when the automatic transaxle assembly, engine assembly or ECM has been replaced, it is necessary to reset the memory so that the ECM can memorize new information. The reset procedure is as follows.
1. Turn the ignition switch OFF.
2. Connect the hand-held tester to the DLC3.
3. Turn the ignition switch ON and turn the hand-held tester main switch on.
4. Enter the following menus: DIAGNOSIS / ENHANCED OBD II.
5. Perform the reset memory procedure from the ENGINE menu.
CAUTION: After performing the RESET MEMORY, be sure to perform the ROAD TEST described earlier in this section.

Fig 30: Identifying Reset Memory Display
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002