Automatic Transmission - Diagnostics: Pre-Check

DIAGNOSIS SYSTEM

Description
- When troubleshooting OBD II vehicles, the only difference from the usual troubleshooting procedure is that you connect to the vehicle an OBD II scan tool complying with SAE J1987 or hand-held tester, and read off various data output from the vehicle's ECM.
- OBD II regulations require that the vehicle's on board computer lights up the Malfunction Indicator Lamp (MIL) on the instrument panel when the computer detects a malfunction in the computer itself or in drive system components which affect vehicle emissions. In addition to the MIL lighting up 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 not occurs in 3-trips, the MIL goes off but the DTCs remain recorded in the ECM memory.
  
  Fig 1: Checking Diagnosis System
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
- To check the DTCs, connect an OBD II scan tool or hand-held tester to DLC3 on 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).
- 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 the manufacturer within the prescribed limits (See DTC 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, and also has a check mode for technicians to simulate malfunction symptoms and perform troubleshooting. Most DTCs use 2-trip detection logic (*) to prevent erroneous detection. By switching the ECM to check mode when troubleshooting, the technician can cause the MIL to light up and for a malfunction that is only detected once or momentarily (hand-held tester).
- *2-trip detection logic:
  When a logic malfunction is first detected, the malfunction is temporarily stored in the ECM memory.
  
  If the same malfunction is detected again during the 2nd test drive, this 2nd detection causes the MIL to light up.

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.

Fig 3: Identifying Connector Terminal DLC3

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

SPECIFIED CONDITION

Tester connection	Condition	Specified condition
7 (Bus (+) Line) - 5 (Signal ground)	During communication	Pulse generation
4 (Chassis Ground) - Body	Always	1 Ω or less
5 (Signal Ground) - Body	Always	1 Ω or less
16 (B+) - Body	Always	9 - 14 V

HINT:

If your display shows "UNABLE TO CONNECT TO VEHICLE" when you have connected the cable of OBD II scan tool or hand-held tester to DLC3, turned the ignition switch ON and operated the scan tool, there is a problem on the vehicle side or tool side.

If communication is normal when the tool is connected to another vehicle, inspect DLC3 on the original vehicle.
If communication is still not possible 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.

INSPECT DIAGNOSIS (NORMAL MODE)
1. 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 TROUBLESHOOTING ).
  2. When the engine is started, the MIL should go off. If the lamp remains on, the diagnosis system has detected a malfunction or abnormality in the system.
    
    Fig 4: Identifying Checking Diagnosis (Normal Mode)
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Check the DTC.
  NOTE: When the diagnostic system is switched from normal mode to check mode, it erases all DTCs and freeze frame data recorded in normal mode. So before switching modes, always check the DTCs and freeze frame data, and note them down.
  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 DLC3 at the lower of the instrument panel.
  3. Turn the ignition switch ON and turn the OBD II scan tool or hand-held tester switch ON.
  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 note them down (For operating instructions, see the OBD II scan tool's instruction book).
  6. See DIAGNOSTIC TROUBLE CODE CHART to confirm the details of the DTCs.
  NOTE: When simulating symptoms with an OBD II scan tool (excluding hand-held tester) to check the DTCs, use normal mode. For codes on the DTCs chart subject to "2-trip detection logic", turn the ignition switch OFF after the symptoms have been simulated the 1st time. Then repeat the simulation process again. When the program has DTCs are recorded in the ECM.
  
  Fig 5: Connecting Hand-Held Tester To DLC3
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSPECT DIAGNOSIS (CHECK MODE)
HINT:

Hand-held tester only:

Compared to the normal mode, the check mode has high sensing ability to detect malfunctions. Furthermore, the same diagnostic items which are detected in Normal mode can also be detected in Check mode.
1. Check the DTC.
  1. Check the initial conditions.
    - Battery positive voltage 11 V or more.
    - Throttle valve fully closed.
    - Transaxle in P position.
    - Air conditioning switched off.
  2. Turn the ignition switch OFF.
  3. Connect the hand-held tester to DLC3 at the lower of the instrument panel.
  4. Turn the ignition switch ON and switch the hand held tester ON.
    
    Fig 6: Connecting Hand-Held Tester To DLC3
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  5. Switch the hand-held tester from Normal mode to Check mode (Check that the MIL flashes).
    NOTE: If the hand-held tester switches the ECM from Normal mode to Check mode or vice-versa, or if the ignition switch is turned from ON to ACC or OFF during check mode, the DTCs and freeze frame data will be erased.
  6. Start the engine (MIL goes out after the engine starts).
  7. Simulate the conditions of the malfunction described by the customer.
    NOTE: Leave the ignition switch ON until you have checked the DTCs, etc.
    
    Fig 7: Identifying Blinking Pattern
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  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 Check mode to Normal mode, which erases all DTCs, etc.
  9. After checking the DTC, inspect the applicable circuit.
2. Clear the DTC.
  1. Connect the OBD II scan tool or hand-held tester to the DLC3.
  2. Turn the ignition switch to the ON position and push the OBD II scan tool or the hand-held tester main switch on.
  3. 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 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.)
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 of the method to shorten the labor time.
1. Warm up the engine.
2. Turn the ignition switch off.
3. Connect the OBD II scan tool or hand-held tester to the DLC3.
4. Turn the ignition switch to the ON position.
5. Push the "ON" button of the OBD II scan tool or the hand-held tester.
6. Select the item "DIAGNOSIS/ENHANCED OBD II/DATA LIST".
7. According to the display on tester, read the "DATA LIST".
  
  Fig 8: Diagnostic Chart
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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 of the method to shorten the labor time.

It is possible to display the DATA LIST 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 to the ON position.
5. Push the "ON" button of the hand-held tester.
6. Select the item "DIAGNOSIS/ENHANCED OBD II/ACTIVE TEST".
7. According to the display on tester, perform the "ACTIVE TEST".
  
  Fig 9: Diagnostic Chart
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  *: "LINE PRESS UP" in ACTIVE TEST is performed to check the line pressure changes by connecting the SST to the automatic transaxle same as used in HYDRAULIC TEST.
  
  HINT:
  
  The pressure values in ACTIVE TEST and HYDRAULIC TEST are different from each other.

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 PART AND SYSTEM NAME LIST

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-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 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 10: Identifying ECM Monitoring Status (1 Of 4)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 11: Identifying ECM Monitoring Status (2 Of 4)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 12: Identifying ECM Monitoring Status (3 Of 4)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 13: Identifying ECM Monitoring Status (4 Of 4)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
PROBLEM SYMPTOM CONFIRMATION
Taking into consideration the results of the customer problem analysis, try to reproduce the symptoms of the trouble. 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 to confirm the automatic shift schedule and simulate the problem symptoms.
ROAD TEST
NOTE: Perform the test at the ATF (Automatic Transmission Fluid) temperature 50 to 80°C (122 to 176°F) in the normal operation.
1. D position test
  Shift into the D position and fully depress the accelerator pedal and check the following points.
  1. Check up shift operation.
    Check that 1 --> 2, 2 --> 3 and 3 --> O/D up shift takes place, and that the shift points conform to the automatic shift schedule (See SERVICE DATA ).
    
    HINT:
    
    O/D Gear Up-shift Prohibition Control
    - Coolant temp, is Ω°C (140°F) or less and vehicle speed is 70 km/h (43 mph) or less.
    - ATF temp. is 20°C (68°F) or less.
    - If there is a 10 km/h (6 mph) difference between the set cruise control speed and vehicle speed.
    O/D Gear Lock-up Prohibition Control
    - Brake pedal is depressed.
    - Coolant temp. is 60°C (140°F) or less.)
  2. Check for shift shock and slip.
    Check for shock and slip at the 1 --> 2, 2 --> 3 and 3 --> O/D up-shifts.
  3. Check for abnormal noises and vibration.
    Drive in the D position lock up or O/D gear and check for abnormal noises and vibration.
    
    HINT:
    
    The check for the cause of abnormal noises and vibration must be done very thoroughly as it could also be due to loss of balance in the differential torque converter clutch, etc.
  4. Check kick down operation.
    Check vehicle speeds when the 2nd to 1st, 3rd to 2nd and O/D to 3rd kick-downs take place while driving with the shift lever in the D position. Confirm that each speed is within the applicable vehicle speed range indicated in the automatic shift schedule (See SERVICE DATA ).
  5. Check abnormal shock and slip at kick down.
  6. Check the lock up mechanism.
    - Drive in D position, O/D gear, at a steady speed (lock up ON) of about 60 km/h (37 mph).
    - Lightly depress the accelerator pedal and check that the engine speed does not change abruptly.
    If there is a big jump in engine speed, there is no lock up.
2. 2 position test
  Shift into the 2 position and fully depress the accelerator pedal and check the following points.
  1. 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 SERVICE DATA ).
    
    HINT:
    
    There is no O/D up shift and lock up in the 2 position.
  2. Check engine braking.
    While running 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 shock at up shift and down-shift.
3. L position test
  Shift into the L position and fully depress the accelerator pedal and check the following points.
  1. Check no up shift.
    While running in the L position, check that there is no up shift to 2nd gear.
  2. Check engine braking.
    While running 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
  Shift into the R position, 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°) and after shifting into the P position, release the parking brake. Then, check that the parking lock pawl holds the vehicle in place.
BASIC INSPECTION
1. Check the fluid level.
  HINT:
  - Drive the vehicle so that the engine and transaxle are at normal operating temperature.
    Fluid temp.: 70 to 80°C (158 to 176°F)
  - Only use the COOL range on the dipstick as a rough reference when the fluid is replaced or the engine does not run.
  1. Park the vehicle on a level surface and set the parking brake.
  2. With the engine idling and the brake pedal depressed, shift the shift lever into all positions from P to L position and return to 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.
  If the level is at the low side, add new fluid.
  
  Fluid type: ATF Type T-IV
  
  Capacity: 2.9 liters (3.1 US qts, 2.6 lmp. qts)
  
  NOTE: Do not overfill.
  
  Fig 14: Identifying COOL Range On Dipstick
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Check the fluid condition.
  If the fluid smells burnt or is black, replace it.
3. Replace the ATF.
  1. Remove the drain plug and drain the fluid.
  2. Reinstall the drain plug securely.
    
    Fig 15: Identifying Drain Plug
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. With the engine OFF add new fluid through the oil filler pipe.
    Fluid type: ATF Type T-IV
    
    Capacity: 2.9 liters (3.1 US qts, 2.6 lmp. qts)
  4. Start the engine and shift the shift lever into all positions from P to L position and then shift into P position.
  5. With the engine idling, check the fluid level. Add fluid up to the COOL level on the dipstick.
    
    Fig 16: Filling Fluid Through Oil Filler Pipe
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  6. Check the fluid level at the normal operating temperature, 70 to 80°C (158 to 176°F), and add as necessary.
  NOTE: Do not overfill.
4. Check the fluid leaks.
  Check for leaks in the transaxle.
  
  If there are leaks, it is necessary to repair or replace O-rings, gaskets, oil seals, plugs or other parts.
  
  Fig 17: Checking Fluid Level
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
5. Inspect and adjust the park/neutral position.
  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.
  1. Loosen the park/neutral position switch bolt and set the shift lever to the N position.
  2. Align the groove and neutral basic line.
  3. Hold in position and tighten the bolt.
  Torque: 5.4 N.m (55 kgf.cm, 48 in.lbf)
  
  For continuity inspection of the park/neutral position switch, see CIRCUIT INSPECTION .
  
  Fig 18: Identifying Groove And Neutral Basic Line
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
6. Check the idle speed.
  Idle speed: 600 +/- 50 RPM
  
  (In N position and air conditioner OFF)
MECHANICAL SYSTEM TESTS
1. Measure the stall speed.
  The object of this test is to check the overall performance of the transaxle and engine by measuring the stall speeds in the D and R positions.
  NOTE:
  - Perform the test at the normal operating ATF (Automatic Transmission Fluid) temperature 50 to 80°C (122 to 176°F).
  - Do not continuously run this test longer than 5 seconds.
  - To ensure safety, conduct this test in a wide, clear level area which provides good traction.
  - 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.
    
    Chock the 4 wheels.
    
    Connect an OBD II scan tool or hand-held tester to DLC3.
    
    Fully apply the parking brake.
    
    Keep your left foot pressed firmly on the brake pedal.
    
    Start the engine.
    
    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: 2,350 +/- 200 RPM
    
    Do the same test in R position.
    Stall speed: 2,350 +/- 200 RPM
  Evaluation:
  
  Fig 19: Evaluation Chart
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. 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 No. 2 one-way clutch, reverse clutch, forward clutch, and 1st & reverse brake.
  NOTE:
  - Perform the test at the normal operating ATF temperature 50 to 80°C (122 to 176°F).
  - Be sure to allow 1 minute interval between tests.
  - Take 3 measurements and take the average value.
    
    Connect an OBD II scan tool or hand-held tester to DLC3.
    
    Fully apply the parking brake.
    
    Start and warm up the engine and check idle speed.
    Idle speed: approx. 700 RPM (In N position and A/C OFF)
    
    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
    
    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 specified):
  
  Fig 20: Evaluation Chart
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

HYDRAULIC TEST

Measure the line pressure.

NOTE:

Perform the test at the normal operating ATF temperature 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 wheels or wheel stoppers outside the vehicle while the other is doing the test.
Be careful to prevent SST's hose from interfering with the exhaust pipe.
1. Warm up the ATF (Automatic Transmission Fluid).
2. Remove the test plug on the transaxle case front left side and connect SST (See COMPONENTS for the location to connect SST).
  SST 09992-00095 (09992-00231, 09992-00271)
3. Fully apply the parking brake and chock the 4 wheels.
4. Connect an OBD II scan tool or hand-held tester to DLC3.
5. Start the engine and check idling speed.
6. Keep your left foot pressed firmly on the brake pedal and shift into D position.
7. Measure the line pressure when the engine is idling.
8. Depress the accelerator pedal all the way down. Quickly read the highest line pressure when engine speed reaches stall speed.
9. In the same manner, do the test in R position.

Specified line pressure:

SPECIFIED LINE PRESSURE

Condition	D position	R position
Idling	372 to 407 kPa (3.8 to 4.2 kgf/cm² , 55 to 60 psi)	541 to 636 kPa (5.5 to 6.5 kgf/cm² , 78 to 92 psi)
Stall test	1,107 to 1,225 kPa (11.3 to 12.5 kgf/cm² , 161 to 178 psi)	1,695 to 1,813 kPa (17.3 to 18.5 kgf/cm² , 246 to 263 psi)

Evaluation:

Fig 21: Evaluation Chart

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

MANUAL SHIFTING TEST

HINT:

With this test, it can be determined whether the trouble is within the electrical circuit or is a mechanical problem in the transaxle.

Disconnect the transmission wire connector.

Inspect the manual driving operation.

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

While driving, shift through the L, 2 and D positions. Check that the gear change corresponds to the shift position.

Fig 22: Disconnecting Transmission Wire Connector

SHIFT AND GEAR POSITION

Shift Position	Gear Position
D	3rd
2	3rd
L	3rd
R	Reverse
P	Pawl Lock

HINT:

If the gear positions of the L, 2 and D are difficult to positions are difficult to distinguish, do the following read test.

If any abnormality is found in the above test, the problem is in the transaxle itself.

Connect the transmission wire connector.
Clear the DTC.

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

NOTE: Hand-held tester only

HINT:

The ECM memorizes the condition that the ECT controls the automatic transaxle assy and engine assy according to those characteristics. Therefore, when the automatic transaxle 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.
1. Turn the ignition switch off.
2. Connect the hand-held tester to the DLC3.
3. Turn the ignition switch to the ON position and push the hand-held tester main switch on.
4. Select the item "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.
  
  Fig 23: Reset Memory Flow Chart
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002