PRECAUTION
Note. Perform the RESET MEMORY (AT initialization) when replacing the automatic transmission assy, engine assy or ECM (See INITIALIZATION ).
HINT
RESET MEMORY cannot be completed by only disconnecting the battery terminal.
Note. When disconnecting the battery terminal, initialize the following system after the terminal is reconnected.
| System Name | Refer To |
|---|---|
| Back Door Power Window Control System | ADJUSTMENT |
SYSTEM NAME REFERENCE
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 | A group of diagnostic trouble codes that are output by the ECM based on the same malfunction detection logic. |
| 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. |
| Component operating range | Normal operation range of sensors and solenoids under normal driving conditions. Use these ranges as a reference. They cannot be used to judge if a sensor or solenoid is defective or not. |
DEFINITION OF TERMS
TOYOTA PART AND SYSTEM NAME LIST
This reference list indicates the part names used in this manual along with their definitions.
| Part and system 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 |
TOYOTA PART SYSTEM NAME LIST
Scheme 291
SYSTEM DIAGRAM
The configuration of the electronic control system in the A750E/A750F automatic transmission is as shown in the following chart.
Scheme 292
INITIALIZATION
- RESET MEMORY NOTE: Perform the RESET MEMORY (AT initialization) when replacing the automatic transmission assy or ECM. The RESET MEMORY can be performed only with the Hand-held tester. HINT: The ECM memorizes the condition that the ECT controls the automatic transmission assy and engine assy according to those characteristics. Therefore, when the automatic transmission assy, engine assy, or ECM has been replaced, it is necessary to reset the memory so that the ECM can memorize the new information. Reset procedure is as follows. Turn the ignition switch off. Connect the hand-held tester to the DLC3. Turn the ignition switch to the ON position. Turn the hand-held tester main switch on. Select the item "DIAGNOSIS/ENHANCED OBD II". Perform the reset memory procedure from the ENGINE menu.
Note. After performing the RESET MEMORY, be sure to perform the ROAD TEST (See ROAD TEST ) described earlier.
HINT
The ECM learns through use of the ROAD TEST.
Scheme 293
LIST OF DISABLE A MONITOR
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.
Scheme 294
Scheme 295
Scheme 296
Scheme 297
Scheme 298
Scheme 299
MONITOR DRIVE PATTERN
- MONITOR DRIVE PATTERN FOR ECT TEST Perform this drive pattern as one method to simulate the detection conditions of the ECT malfunctions. (The DTCs may not be detected due to the actual driving conditions. And some codes may not be detected through this drive pattern.) HINT: Preparation for driving Warm up the engine sufficiently. (Engine coolant temperature is 60° C (140° F) or higher). Drive the vehicle when the atmospheric temperature is -10° C (14° F) or higher. (Malfunction is not detected when the atmospheric temperature is -10° C (14° F) or less). Notice in driving Drive the vehicle through all gears. Stop --> 1st --> 2nd --> 3rd --> 4th --> 5th --> 5th (lock-up ON). Repeat the above driving pattern three times or more. NOTE: The monitor status can be checked using the OBD II scan tool. When using the hand-held tester, monitor status can be found in the "ENHANCED OBD II / DATA LIST" or under "CARB OBD II". In the event that the drive pattern must be interrupted (possibly due to traffic conditions or other factors), the drive pattern can be resumed and, in most cases, the monitor can be completed. Perform this drive pattern on a level road as much as possible and strictly observe the posted speed limits and traffic laws while driving.
Scheme 300
HINT
*1: Drive at such a speed in the uppermost gear, to engage lock-up. The vehicle can be driven at a speed lower than that in the above diagram under the lock-up condition.
Note. It is necessary to drive the vehicle for approximately 30 minutes to detect DTC P0711 (ATF temperature sensor malfunction).
Chapter 2: On-Vehicle Repair
(*: A750E, A750F AUTOMATIC TRANSMISSION Repair Manual Pub. No. RM999U)
Scheme 301
Chapter 3: Off-Vehicle Repair
(*: A750E, A750F AUTOMATIC TRANSMISSION Repair Manual Pub. No. RM999U)
Scheme 302
Scheme 303
Scheme 304
- 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 be inspected. The standard voltage between the terminals is shown under "Specific Condition". Use the illustration above as a reference for the ECM terminals.
HINT
*: 4WD
Waveform 1
Reference
| Terminal | SLT+ - SLT |
|---|---|
| Tool setting | 5V/DIV, 1ms/DIV |
| Vehicle condition | Engine idle speed |
ECM SYMBOL DESCRIPTION
Scheme 305
Waveform 2
Reference
| Terminal | SLU+ - SLU |
|---|---|
| Tool setting | 5V/DIV, 1ms/DIV |
| Vehicle condition | 5th (lock-up) or 6th (lock-up) gear |
WAVEFORM REFERENCE 1
Scheme 306
Waveform 3
Reference
| Terminal | SL2+ - SL2 |
|---|---|
| Tool setting | 5V/DIV, 1ms/DIV |
| Vehicle condition | Engine idle speed |
WAVEFORM REFERENCE 2
Scheme 307
Waveform 4
Reference
| Terminal | SL1+ - SL1 |
|---|---|
| Tool setting | 5V/DIV, 1ms/DIV |
| Vehicle condition | Engine idle speed |
WAVEFORM REFERENCE 3
Scheme 308
Waveform 5
Reference
| Terminal | NT+ - NT |
|---|---|
| Tool setting | 1V/DIV, 2ms/DIV |
| Vehicle condition | Engine idle speed (P or N position) |
WAVEFORM REFERENCE 4
Scheme 309
Waveform 6
Reference
| Terminal | SP2+ - SP2 |
|---|---|
| Tool setting | 2V/DIV, 20ms/DIV |
| Vehicle condition | Vehicle speed 20 km/h (12 mph) |
WAVEFORM REFERENCE 5
Scheme 310
NORMAL MODE AND CHECK MODE
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. "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.
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 ON again, and the same malfunction is detected again, the MIL will illuminate.
Scheme 311
FREEZE FRAME DATA
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 hand-held tester records freeze frame data in five different instances: 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 a temporary malfunction or not.
Scheme 312
DLC3 (Data Link Connector 3)
The vehicle's ECM uses the ISO 15765-4 for communication protocol. The terminal arrangement of the DLC3 complies with SAE J1962 and matches the ISO 15765-4 format.
HINT
Connect the cable of the hand-held tester to the DLC3, turn the ignition switch ON and attempt to use 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 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. Consult the Service Department listed in the tool's instruction manual.
Scheme 313
| 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 ohm | Always |
| SG | 5 | Signal ground | Body ground | Below 1 ohm | Always |
| BAT | 16 | Battery positive | Body ground | 11 to 14 V | Always |
| CANH | 6 | HIGH-level CAN bus line | CANL | 54 to 69 ohm | IG switch OFF |
| CANH | 6 | HIGH-level CAN bus line | Battery positive | 1 M ohm or higher | IG switch OFF |
| CANH | 6 | HIGH-level CAN bus line | CG | 1 k ohm or higher | IG switch OFF |
| CANL | 14 | LOW-level CAN bus line | Battery positive | 1 M ohm or higher | IG switch OFF |
| CANL | 14 | LOW-level CAN bus line | CG | 1 k ohm or higher | IG switch OFF |
TERMINAL SYMBOL DESCRIPTION
CHECK BATTERY VOLTAGE
Battery voltage: 11 to 14 V
If voltage is below 11 V, replace the battery before proceeding.
CHECK MIL
- Check that the MIL illuminates when turning the ignition switch ON. If the MIL does not illuminate, there is a problem in the MIL circuit (refer to MIL CIRCUIT on «MIL CIRCUIT»(ref-227566-S03995357272006040600000) )
- When the engine is started, the MIL should turn off.
ALL READINESS
For this vehicle, using the hand-held tester allows readiness codes corresponding to all DTCs to be read. When diagnosis (normal or malfunctioning) has been complete, readiness codes are set. Enter the following menus: ENHANCED OBD II / MONITOR STATUS on the hand-held tester.
Scheme 314
- CHECK DTC DTCs which are stored in the ECM can be displayed with the hand-held tester or generic OBD II scan tool. These scan tools can display pending DTCs and current DTCs. Some DTC aren't stored if the ECM doesn't detect a malfunction during consecutive driving. However, the detected malfunction during once driving is stored as pending DTC. Connect the hand-held tester to the Controller Area Network Vehicle Interface Module (CAN VIM). Then connect the CAN VIM to the Data Link Connector 3 (DLC3). Turn the ignition switch ON. Enter the following menus: DIAGNOSIS / ENHANCED OBD II / DTC INFO / CURRENT CODES (or PENDING CODE). Confirm the DTCs and freeze frame data and then write them down. See «DIAGNOSTIC TROUBLE CODE CHART»(ref-227567-S13166008592006040600000) to confirm the details of the DTCs. NOTE: When simulating a symptom with the scan tool to check for DTCs, use normal mode. For codes on DIAGNOSTIC TROUBLE CODE CHART subject to "2-trip detection logic", perform the following actions. Turn the ignition switch OFF after the symptom is simulated once. Then repeat the simulation process again. When the problem has been simulated twice, the MIL illuminates and the DTCs are recorded in the ECM.
- CLEAR DTC Connect the hand-held tester to the CAN VIM. Then connect the CAN VIM to the DLC3. Turn the ignition switch ON. Enter the following menus: DIAGNOSIS / ENHANCED OBD II / DTC INFO / CLEAR CODES and press YES.
FAIL-SAFE CHART
- FAIL-SAFE This function minimizes the loss of the ECT functions when any malfunction occurs in a sensor or solenoid. SYSTEM MALFUNCTION DESCRIPTION Malfunction Part Function Output Speed Sensor (SP2) During an output speed sensor malfunction, shift control is effected through the input speed sensor signal (NT). ATF Temp. Sensor No. 1 During an ATF temperature sensor No. 1 malfunction, up-shift to the 5th and flex lock-up clutch control are prohibited. Shift Solenoid Valve S1, S2 and SR The current to the failed solenoid valve is cut off and control is effected by operating the other solenoid valves with normal operation. Shift control is effected depending on the failed solenoid as described in the table on the next page. Shift Solenoid Valve SL1 and SL2 During a solenoid valve SL1 or SL2 malfunction, up-shift to the 5th is prohibited. Shift Solenoid Valve SLU During a solenoid valve SLU malfunction, the current to the solenoid valve is stopped. This stops lock-up control and flex lock-up control, fuel economy decreases. Shift Solenoid Valve SLT During a solenoid valve SLT malfunction, the current to the solenoid valve is stopped. This stops line pressure optimal control, the shift shock increases. However, shifting is effected through normal clutch pressure control. Fail Safe Function: If either of the shift solenoid valve circuits has an open or short failure, the ECM turns the other shift solenoid "ON" and "OFF" in order to shift into the gear positions shown in the table below. In case of a short circuit, the ECM stops sending current to the short circuited solenoid. Even if starting the engine again in the fail-safe mode, the gear position remains in the same position.
Scheme 315
Scheme 316
Scheme 317
Scheme 318
- 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 the first step of troubleshooting is one method to shorten labor time. Warm up the engine. Turn the ignition switch off. Connect the OBD II scan tool or hand-held tester to the DLC3. Turn the ignition switch to the ON position. Push the "ON" button of the OBD II scan tool or the hand-held tester. When you use the hand-held tester: Select the item "DIAGNOSIS / ENHANCED OBD II / DATA LIST". According to the display on the tester, read the "DATA LIST".
- 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 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 hand-held 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". *: "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 (See «HYDRAULIC TEST»(ref-227567-S22447086702006040600000) ) as well. HINT: The pressure values in ACTIVE TEST and HYDRAULIC TEST are different from each other.
TYPICAL MALFUNCTION THRESHOLDS
| Detection criteria | Threshold |
|---|---|
| Range check (Fluttering) | |
| TFT (transmission fluid temperature) sensor resistance | Less than 79 ohm or More than 156 k ohm |
| Range check (Low resistance) | |
| TFT (transmission fluid temperature) sensor resistance | Less than 79 ohm |
| Range check (High resistance) | |
| TFT (transmission fluid temperature) sensor resistance | More than 156 k ohm |
TYPICAL MALFUNCTION THRESHOLDS
COMPONENT OPERATING RANGE
| Parameter | Standard value |
|---|---|
| TFT (Transmission Fluid Temperature) sensor | Atmospheric temperature to approx. 130° C (266° F) |
COMPONENT OPERATING RANGE
Scheme 319
| Detection criteria | Threshold |
|---|---|
| TFT (Transmission Fluid Temperature) | Less than 20° C (68° F) (varies with TFT (Transmission Fluid Temperature) at engine start) |
TYPICAL MALFUNCTION THRESHOLDS
| Detection criteria | Threshold |
|---|---|
| Sensor signal RPM | Less than 300 RPM |
TYPICAL MALFUNCTION THRESHOLDS
| Parameter | Standard value |
|---|---|
| Speed sensor (NT) | Input speed is equal to engine speed when lock-up ON. |
COMPONENT OPERATING RANGE
Scheme 320
| Detection criteria | Threshold |
|---|---|
| Output speed sensor pulse input | No input |
TYPICAL MALFUNCTION THRESHOLDS
Scheme 321
| Detection criteria | Threshold |
|---|---|
| Brake switch | Remain ON during GO and STOP 5 times |
TYPICAL MALFUNCTION THRESHOLDS
| Detection criteria | Threshold |
|---|---|
| Output signal duty | 100% |
TYPICAL MALFUNCTION THRESHOLDS
| Parameter | Standard value |
|---|---|
| Output signal duty | Less than 100% |
COMPONENT OPERATING RANGE
Scheme 322
| Detection criteria | Threshold |
|---|---|
| Output signal duty | 100% |
TYPICAL MALFUNCTION THRESHOLDS
| Parameter | Standard value |
|---|---|
| Output signal duty | Less than 100% |
COMPONENT OPERATING RANGE
Scheme 323
| Detection criteria | Threshold |
|---|---|
| Both of the following conditions are met: Condition (A), and Condition (B), (C) or (D) | |
| Condition (A) | |
| Turbine speed/Output speed | 3.30 to 7.50 |
| Condition (B) | |
| Turbine speed/Output speed | 1.28 to 1.53 |
| Condition (C) | |
| Turbine speed - Output speed x 4th gear ratio (NT - NO x 4th gear ratio) | 1,000 RPM or more |
| Condition (D) | |
| Turbine speed - Output speed x 5th gear ratio (NT - NO x 5th gear ratio) | 1,000 RPM or more |
TYPICAL MALFUNCTION THRESHOLDS
Scheme 324
- Check other DTCs output (in addition to DTC P0781). PREPARATION: Turn the ignition switch off. Connect the OBD II scan tool or hand-held tester to the DLC3. Turn the ignition switch to the ON position. Turn on the tester. Select the item "DIAGNOSIS / ENHANCED OBD II / DTC INFO / CURRENT CODES". CHECK: Read the DTCs using the OBD II scan tool or the hand-held tester. RESULT: DTC OUTPUT DESCRIPTION Display (DTC output) Proceed to Only "P0781" is output A "P0781" and other DTCs B HINT: If any other codes besides "P0781" are output, perform troubleshooting for those DTCs first. B: Go to DTC chart (See «DIAGNOSTIC TROUBLE CODE CHART»(ref-227567-S13166008592006040600000) ). A: Go to next step.
- Perform 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 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 hand-held 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". HINT: While driving, the shift position can be forcibly changed with the hand-held tester. Comparing the shift position commanded by the ACTIVE TEST with the actual shift position enables you to confirm the problem (See «FAIL-SAFE CHART»(ref-227567-S17697812512006040600000) ). Standard: HINT: This test can be conducted when the vehicle speed is 50 km/h (31 mph) or less. The 4th to 5th up-shiftings must be performed with the accelerator pedal released. The 5th to 4th down-shiftings must be performed with the accelerator pedal released. Do not operate the accelerator pedal for at least 2 seconds after shifting and do not shift successively. The shift position commanded by the ECM is shown in the DATA LIST (SHIFT) display on the hand-held tester. OK: Gear position changes in accordance with the tester command. NG: Repair or replace valve body (See «VALVE BODY ASSEMBLY»(ref-227596-S00044450492006040600000) ). OK: Go to next step.
- Clear the DTC and running test. CHECK: Clear the DTC, and check DTC again after conducting the "MONITOR DRIVE PATTERN FOR ECT TEST" (See «MONITOR DRIVE PATTERN»(ref-227567-S34715753032006040600000) ). OK: No DTC code NG: Repair or replace valve body (See «VALVE BODY ASSEMBLY»(ref-227596-S00044450492006040600000) ). OK: END
| Detection criteria | Threshold |
|---|---|
| Range check (Low resistance) | |
| Shift solenoid valve S1 resistance | 8 ohm or less |
| Range check (High resistance) | |
| Shift solenoid valve S1 resistance | 100 k ohm or more |
TYPICAL MALFUNCTION THRESHOLDS
| Parameter | Standard value |
|---|---|
| Shift solenoid valve S1 | Resistance: 11 to 15 ohm at 20° C (68° F) |
COMPONENT OPERATING RANGE
Scheme 325
| Detection criteria | Threshold |
|---|---|
| Range check (Low resistance) | |
| Shift solenoid valve S2 resistance | 8 ohm or less |
| Range check (High resistance) | |
| Shift solenoid valve S2 resistance | 100 k ohm or more |
TYPICAL MALFUNCTION THRESHOLDS
| Parameter | Standard value |
|---|---|
| Shift solenoid valve S2 | Resistance: 11 to 15 ohm at 20° C (68° F) |
COMPONENT OPERATING RANGE
Scheme 326
| Detection criteria | Threshold |
|---|---|
| Range check (Low Resistance) | |
| Shift solenoid valve SR resistance | 8 ohm or less |
| Range check (High Resistance) | |
| Shift solenoid valve SR resistance | 100 k ohm or more |
TYPICAL MALFUNCTION THRESHOLDS
| Parameter | Standard value |
|---|---|
| Shift solenoid valve SR | Resistance: 11 to 15 at 20° C (68° F) |
COMPONENT OPERATING RANGE
Scheme 327
| Detection criteria | Threshold |
|---|---|
| Summation of C1 clutch heat generations = sim (Turbine speed - Output speed x Temporary ratio) | Specified value |
TYPICAL MALFUNCTION THRESHOLDS
Scheme 328
| Detection criteria | Threshold |
|---|---|
| Solenoid status from IC | Fail (Open or short) |
TYPICAL MALFUNCTION THRESHOLDS
| Parameter | Standard value |
|---|---|
| Output signal duty | Less than 100% |
COMPONENT OPERATING RANGE
Scheme 329
Scheme 330
Scheme 331
Scheme 332
Scheme 333
Scheme 334
- Check transmission wire. PREPARATION: Disconnect the transmission wire connector. CHECK: Measure the resistance according to the value(s) in the table below. OK: TESTER CONNECTION SPECIFIED CONDITION Tester Connection Specified Condition 20° C (68° F) 14 (SLT+) - 6 (SLT-) 5.0 to 5.6 ohm CHECK: Measure the resistance according to the value(s) in the table below. OK: NG: Go to step 3 . OK: Go to next step.
- Check harness and connector (Transmission wire - ECM) PREPARATION: Connect the transmission wire connector. Disconnect the ECM connector. CHECK: Measure the resistance according to the value(s) in the table below. OK: TESTER CONNECTION SPECIFIED CONDITION Tester Connection Specified Condition 20° C (68° F) E7 - 13 (SLT+) - E7 - 12 (SLT-) 5.0 to 5.6 ohm CHECK: Measure the resistance according to the value(s) in the table below. OK: NG: Repair or replace the harness or connector (See «HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE»(ref-227563-S16821795662006040600000) ). OK: Replace the ECM (See «ENGINE CONTROL MODULE (ECM)»(ref-227590-S42439373302006040600000) ).
- Inspect shift solenoid valve SLT. PREPARATION: Remove the shift solenoid valve SLT (See «VALVE BODY ASSEMBLY»(ref-227596-S00044450492006040600000) ). CHECK: Measure the resistance according to the value(s) in the table below. OK: TESTER CONNECTION SPECIFIED CONDITION Tester Connection Specified Condition 20° C (68° F) 1 - 2 5.0 to 5.6 ohm CHECK: Connect the positive (+) lead with a 21 W bulb to terminal 2 and the negative (-) lead to terminal 1 of the solenoid valve connector, then check the movement of the valve. OK: The solenoid makes an operating sound. NG: Replace the shift solenoid valve SLT (See «VALVE BODY ASSEMBLY»(ref-227596-S00044450492006040600000) ). OK: Repair or replace the transmission wire (See «ATF TEMPERATURE SENSOR»(ref-227596-S41279493352006040600000) ).
| Detection criteria | Threshold |
|---|---|
| Range check (Fluttering) | |
| TFT (transmission fluid temperature) sensor voltage | Less than 0.046 V or More than 4.915 V |
| Range check (Low voltage) | |
| TFT (transmission fluid temperature) sensor voltage | Less than 0.046 V |
| Range check (High voltage) | |
| TFT (transmission fluid temperature) sensor voltage | More than 4.915 V |
TYPICAL MALFUNCTION THRESHOLDS
| Parameter | Standard value |
|---|---|
| TFT (transmission fluid temperature) sensor | Atmospheric temperature to approx. 130° C (266° F) |
COMPONENT OPERATING RANGE
Scheme 335
| Detection criteria | Threshold |
|---|---|
| Both of the following conditions are met: OFF malfunctions (A) and (B) | |
| OFF malfunction (A) | |
| Engine speed - Turbine speed | 70 RPM or more |
| OFF malfunction (B) | |
| Turbine speed/Output speed | Not 3.30 to 7.50 |
| ON malfunction | |
| 2 detections are necessary per driving cycle 1st detection; temporary flag ON 2nd detection; pending fault code ON | |
| Vehicle speed must be under 10 km/h (6.2 mph) once before 2nd detection | |
| Difference between engine speed and turbine speed | Less then 35 RPM |
TYPICAL MALFUNCTION THRESHOLDS
| Detection criteria | Threshold |
|---|---|
| Solenoid status from IC | Fail (Open or short) |
TYPICAL MALFUNCTION THRESHOLDS
| Parameter | Standard value |
|---|---|
| Output signal duty | Less than 100% |
COMPONENT OPERATING RANGE
Scheme 336
Scheme 337
Scheme 338
Scheme 339
Scheme 340
Scheme 341
- Inspect transmission wire. PREPARATION: Disconnect the transmission wire connector. CHECK: Measure the resistance according to the value(s) in the table below. OK: TESTER CONNECTION SPECIFIED CONDITION Tester Connection Specified Condition 20° C (68° F) 13 (SLU+) - 5 (SLU-) 5.0 to 5.6 ohm CHECK: Measure the resistance according to the value(s) in the table below. OK: NG: Go to step 3 . OK: Go to next step.
- Check harness and connector (Transmission wire - ECM) PREPARATION: Connect the transmission wire connector. Disconnect the ECM connector. CHECK: Measure the resistance according to the value(s) in the table below. OK: TESTER CONNECTION SPECIFIED CONDITION Tester Connection Specified Condition 20° C (68° F) E7 - 15 (SLU+) - E7 - 14 (SLU-) 5.0 to 5.6 ohm CHECK: Measure the resistance according to the value(s) in the table below. OK: NG: Repair or replace the harness or connector (See «HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE»(ref-227563-S16821795662006040600000) ). OK: Replace the ECM (See «ENGINE CONTROL MODULE (ECM)»(ref-227590-S42439373302006040600000) ).
- Inspect shift solenoid valve SLU. PREPARATION: Remove the shift solenoid valve SLU (See «VALVE BODY ASSEMBLY»(ref-227596-S00044450492006040600000) ). CHECK: Measure the resistance according to the value(s) in the table below. OK: TESTER CONNECTION SPECIFIED CONDITION Tester Connection Specified Condition 20° C (68° F) 1 - 2 5.0 to 5.6 ohm CHECK: Connect the positive (+) lead with a 21 W bulb to terminal 2 and the negative (-) lead to terminal 1 of the solenoid valve connector, then check the movement of the valve. OK: The solenoid makes an operating sound. NG: Replace the shift solenoid valve SLU (See «VALVE BODY ASSEMBLY»(ref-227596-S00044450492006040600000) ). OK: Repair or replace the transmission wire (See «ATF TEMPERATURE SENSOR»(ref-227596-S41279493352006040600000) ).
| Detection criteria | Threshold |
|---|---|
| Both of the following conditions is met: ON malfunctions (A) and (B) | |
| ON malfunction (A) | |
| L4 switch | ON |
| ON malfunction (B) | |
| Actual Transfer gear ratio Transfer input speed/Transfer output speed | 0.9 to 1.1 |
TYPICAL MALFUNCTION THRESHOLDS
Scheme 342
Scheme 343
Scheme 344
- Inspect terminal voltage (L4 - body ground). PREPARATION: Disconnect the 4WD control ECU connector and turn the ignition switch ON. CHECK: Measure the voltage according to the value(s) in the table below. OK: TESTER CONNECTION SPECIFIED CONDITION Tester Connection Specified Condition F23 - 24 (L4) - Body ground 10 to 14 V NG: Check and replace 4WD control ECU (See «INSPECTION»(ref-227597-S38805599112006040600000) ). OK: Go to next step.
- Inspect terminal voltage (L4 - body ground). PREPARATION: Turn the ignition switch ON. CHECK: Measure the voltage according to the value(s) in the table below. OK: TESTER CONNECTION SPECIFIED CONDITION Tester Connection Specified Condition E6 - 13 (L4) - Body ground 10 to 14 V NG: Replace the ECM (See «ENGINE CONTROL MODULE (ECM)»(ref-227590-S42439373302006040600000) ). OK: Repair or replace the harness or connector (See «HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE»(ref-227563-S16821795662006040600000) ).