Electronic Controlled Automatic Transaxle (ECT): Diagnosis Scion tC I

HOW TO PROCEED WITH TROUBLESHOOTING

The hand-held tester can be used at steps 3 , 4 , 6 and 9 .

1. Vehicle Brought to Workshop Go to next step.
2. Customer Problem Analysis (SEE «CUSTOMER PROBLEM ANALYSIS CHECK»(ref-224756-S16425919172006031100000) ) Go to next step.
3. Connect the OBD II scan tool or hand-held tester to DLC3 Go to next step.
4. Check and Clear DTC and Freeze Frame Data (SEE «DTC CHECK/CLEAR»(ref-224756-S02374634422006031100000) ) Go to next step.
5. Visual Inspection Go to next step.
6. Setting the Check Mode Diagnosis (SEE «CHECK MODE PROCEDURE»(ref-224756-S22340771552006031100000) ) Go to next step.
7. Problem Symptom Confirmation (SEE «ROAD TEST»(ref-224756-S33122121742006031100000) ) Symptom does not occur: Go to step 8 Symptom occurs: Go to step 9
8. Symptom Simulation (SEE «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-224750-S39979410482006031100000) ) Go to next step.
9. DTC Check (SEE «DTC CHECK/CLEAR»(ref-224756-S02374634422006031100000) ) DTC is not output: Go to step 10 DTC is output: Go to step 18
10. Basic Inspection (SEE «ON-VEHICLE INSPECTION»(ref-224780-S32160115822006031100000) , «ADJUSTMENT»(ref-224780-S33184690172006031100000) and «ADJUSTMENT»(ref-224780-S40455117122006031100000) ) NG: Go to step 20 OK: Go to next step.
11. Mechanical System Test (SEE «MECHANICAL SYSTEM TESTS»(ref-224756-S10842077622006031100000) ) NG: Go to step 17 OK: Go to next step.
12. Hydraulic Test (SEE «HYDRAULIC TEST»(ref-224756-S12658496412006031100000) ) NG: Go to step 17 OK: Go to next step.
13. Manual Shifting Test (SEE «MANUAL SHIFTING TEST»(ref-224756-S07771488812006031100000) ) NG: Go to step 15 OK: Go to next step.
14. Problem Symptoms Table Chapter 1 (SEE «PROBLEM SYMPTOMS TABLE»(ref-224756-S30496037202006031100000) ) NG: Go to step 19 OK: Go to next step.
15. Problem Symptoms Table Chapter 2 (SEE «PROBLEM SYMPTOMS TABLE»(ref-224756-S30496037202006031100000) ) NG: Go to next step.
16. Part Inspection Go to step 20
17. DTC Chart (SEE «DIAGNOSTIC TROUBLE CODE CHART»(ref-224756-S03603980872006031100000) ) Go to next step.
18. Circuit Inspection Go to next step.
19. Identification of Problem Go to next step.
20. Repair Go to next step.
21. Confirmation Test End

Scheme 84

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 NOTE: Perform the test at the normal operating ATF (Automatic Transmission Fluid) temperature: 50 to 80°C (122 to 176°F). 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 and 3 -> O/D up-shifts take place, and that the shift points conform to the automatic shift schedule (see «AUTOMATIC TRANSMISSION / TRANSAXLE»(ref-224752-S07674100892006031100000) ). HINT: O/D Gear Up-shift Prohibition Control Engine coolant temperature is 60°C (140°F) or less and vehicle speed is at 70 km/h (43 mph) or less. ATF temperature is 10°C (50°F) or less. O/D Gear Lock-up Prohibition Control Brake pedal is depressed. Accelerator pedal is released. Engine 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 and 3 -> O/D up-shifts. Check for abnormal noise and vibration. Check for abnormal noise and vibration when up-shifting from 1 -> 2, 2 -> 3 and 3 -> O/D while driving with the shift lever in the D position, and check while driving in the lock-up condition. HINT: The check for the cause of abnormal noise and vibration must be done thoroughly as it could also be due to loss of balance in the differential, torque converter clutch, etc. 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 «AUTOMATIC TRANSMISSION / TRANSAXLE»(ref-224752-S07674100892006031100000) ). Check for abnormal shock and slip at kick-down. Check the lock-up mechanism. Drive in the D position (O/D 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 function in the 1st and 2nd gear. If there is a big jump in engine speed, there is no lock-up. 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-shifts take place and that the shift point conforms to the automatic shift schedule (see «AUTOMATIC TRANSMISSION / TRANSAXLE»(ref-224752-S07674100892006031100000) ). 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 «AUTOMATIC TRANSMISSION / TRANSAXLE»(ref-224752-S07674100892006031100000) ). 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, 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. P position test: Stop the vehicle on a grade (more than 5ohm) and after shifting into the P position, release the parking brake. Then, check that the parking lock pawl holds the vehicle in place.

Scheme 85

Scheme 86

1. PERFORM MECHANICAL SYSTEM TESTS 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 for longer than 10 seconds. To ensure safety, do 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 the DLC3. Fully apply the parking brake. Using your left foot, keep the brake pedal firmly depressed. 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: 2,550 +/- 150 rpm Do the same test in the R position. Stall speed: 2,550 +/- 150 rpm Evaluation: 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 direct clutch, forward clutch, and 1st and reverse brake. NOTE: Perform the test at the normal operating ATF temperature: 50 to 80°C (122 to 176°F). Be sure to allow for a 1 minute interval between tests. Perform the test three times, and measure the time lags. Calculate the average value of the three time lags. Connect an OBD II scan tool or hand-held tester to the 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 lever from the 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 way, measure the time lag for N -> R. Time lag: N -> R less than 1.5 seconds Evaluation (If N -> D or N -> R time lag is longer than the specified)

Scheme 87

Scheme 88

1. PERFORM HYDRAULIC TEST Measure the line pressure. NOTE: Perform the test at the normal operating ATF (Automatic Transmission Fluid) 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 stopper outside the vehicle while the other is doing the test. Be careful to prevent SST's hose from interfering with the exhaust pipe. Warm up the ATF. Remove the test plug on the front side of the transaxle case and connect SST. SST 09992-00095 (09992- 00231, 09992-00271) Fully apply the parking brake and chock the 4 wheels. Connect an OBD II scan tool or hand-held tester to the DLC3. Start the engine and check idling speed. Keep your left foot pressing firmly on the brake pedal and shift into the D position. Measure the line pressure when the engine is idling. Depress the accelerator pedal all the way down. Quickly read the highest line pressure when engine speed reaches stall speed. In the same way, do the test in the R position. SPECIFIED LINE PRESSURE Condition D position kPa (kgf / cm 2 , psi) R position kPa (kgf / cm 2 , psi) Idling 372 to 412 kPa 672 to 742 kPa (3.8 to 4.2 kgf/cm 2 , 54 to 60 psi) (6.9 to 7.6 kgf/cm 2 , 97 to 108 psi) Stall test 931 to 1,031 kPa 1,768 to 1,968 kPa (9.5 to 10.5 kgf/cm 2 , 135 to 150 psi) (18.0 to 20.0 kgf/cm 2 , 256 to 285 psi) Evaluation

Scheme 89

1. PERFORM MANUAL SHIFTING TEST HINT: By this test, it can be determined whether the trouble is within the electrical circuit or is a mechanical problem in the transaxle. Disconnect the transmission wire connector. Inspect the manual driving operation. Check that the shift and gear positions correspond to the table shown in «SHIFT AND GEAR POSITION»(ref-224756-S36043368942006031100000) . While driving, shift through the L, 2 and D positions. Check that the gear change corresponds to the shift position. 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 distinguish, do the road test (see «ROAD TEST»(ref-224756-S33122121742006031100000) ). If any abnormality is found in the above test, the problem is in the transaxle itself. Connect the transmission wire connector. Clear the DTC (SEE «DTC CHECK/CLEAR»(ref-224756-S02374634422006031100000) ).

Scheme 90

1. RESET MEMORY CAUTION: Perform the RESET MEMORY (AT initialization) when replacing the automatic transaxle assy, engine assy or 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. Turn the ignition switch off. Connect the hand-held tester to the DLC3. Turn the ignition switch to the ON position and turn the hand-held tester main switch on. Select the item "DIAGNOSIS / ENHANCED OBD II". Perform the reset memory procedure from the ENGINE menu. CAUTION: After performing the RESET MEMORY, be sure to perform the ROAD TEST (SEE «ROAD TEST»(ref-224756-S33122121742006031100000) ) described earlier. HINT: The ECM learns through use of the ROAD TEST.

PROBLEM SYMPTOMS TABLE

HINT

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 service category given for troubleshooting.

The Matrix Chart is divided into 2 chapters.

Scheme 91

Scheme 92

1. Chapter 1: Electronic Circuit Matrix Chart Refer to the table (Scheme 91)when the trouble cause is considered to be electrical. If 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. HINT: *1: When the circuit on which mark *1 is attached is defective, DTC could be output (SEE «DIAGNOSTIC TROUBLE CODE CHART»(ref-224756-S03603980872006031100000) ).
2. Chapter 2: On-Vehicle Repair and Off-Vehicle Repair (*: See appropriate AUTOMATIC TRANSMISSION OVERHAUL article )

Scheme 93

Scheme 94

1. ECM HINT: Each ECM terminal's standard voltage is (Scheme 94) In the table (Scheme 94), 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 (Scheme 93) as a reference for the ECM terminals.

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Scheme 101

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Scheme 103

1. DIAGNOSIS SYSTEM 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 hand-held tester to the vehicle, and read off various data output from the vehicle's ECM. OBD II regulations require that the vehicle's onboard 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»(ref-224756-S03603980872006031100000) ). 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 hand-held tester to the DLC3 of the vehicle. The OBD II scan tool or hand-held tester also enables you to erase the DTCs and check freeze frame data and various forms of engine data (For 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 the «DTC CHART»(ref-224756-S03603980872006031100000) ). The diagnosis system operates in the normal mode during the normal vehicle use, and also has a check mode for technicians to simulate malfunction symptoms and perform troubleshooting. Most DTCs use 2 trip detection logic(*) to prevent erroneous detection. By switching the ECM to the check mode when troubleshooting, the technician can cause the MIL to illuminate for a malfunction that is only detected once or momentarily (hand-held tester). *2 trip detection logic: When a malfunction is first detected, the malfunction is temporarily stored in the ECM memory. If the same malfunction is detected again during the second test drive, this second detection causes the MIL to illuminate. Inspect the DLC3. The vehicle's ECM uses ISO 9141-2 for communication. The terminal arrangement of the DLC3 complies with SAE J1962 and matches the ISO 9141-2 format. DLC3 SPECIFIED CONDITIONS Tester connection Condition Specified condition 7 (Bus -> Line) - 5 (Signal ground) During communication Pulse generation 4 (Chassis Ground) - Body Always 1 ohm or less 5 (Signal Ground) - Body Always 1 ohm or less 16 (B+) - Body Always 9 to 14 V HINT: If your display shows UNABLE TO CONNECT TO VEHICLE when you have connected the cable of the OBD II scan tool or hand-held tester to the DLC3, turned the ignition switch 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. Measure the battery voltage. Battery Voltage: 11 to 14 V If voltage is below 11 V, recharge the battery before proceeding. Check the 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.

Scheme 104

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 hand-held tester. 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 and turn the OBD II scan tool or the hand-held tester main switch on. When you use hand-held tester: Select the item "DIAGNOSIS/ENHANCED OBD II/DTC INFO/CURRENT CODES". 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). SEE «DIAGNOSTIC TROUBLE CODE CHART»(ref-224756-S03603980872006031100000) 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 the normal mode. For codes on the DTCs chart which are subject to "2 trip detection logic", turn the ignition switch off after the symptom is simulated once. Then repeat the simulation process again. When the problem has been simulated twice, the MIL illuminates on the instrument panel and DTCs are recorded in the ECM.
2. DTC CLEAR When using the OBD II scan tool or hand-held tester: Clearing the DTCs. Connect the OBD II scan tool or hand-held tester to the DLC3. Turn the ignition switch to the ON position and turn the OBD II scan tool or the hand-held tester main switch on. When you use hand-held tester: 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.) When not using the OBD II scan tool or hand-held 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 the "INITIALIZE (SEE «INITIALIZATION»(ref-224756-S35891037082006031100000) )" procedure.

Scheme 105

Scheme 106

1. DTC CHECK (CHECK MODE) HINT: Hand-held tester only: Compared to the normal mode, the check mode is more sensitive for detecting malfunctions. Furthermore, the same diagnostic items which are detected in the normal mode can also be detected in the check mode. Procedure for Check Mode using the hand-held tester. Check the initial conditions. Battery positive voltage 11 V or more Throttle valve fully closed Transaxle in the P or N position A/C switch is off Turn the ignition switch off. Connect the hand-held tester to the DLC3. Turn the ignition switch to the ON position and turn the hand-held tester main switch on. When you use hand-held tester: Select the item "DIAGNOSIS / ENHANCED OBD II / CHECK MODE" (Check that the MIL flashes). 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 vice-versa; or 2) during check mode, the ignition switch is turned from the ON to ACC position or turned OFF. Start the engine (The MIL goes off after the engine starts). Perform "MONITOR DRIVE PATTERN" for the ECT test (SEE «MONITOR DRIVE PATTERN»(ref-224756-S00350332452006031100000) ). (Or, simulate the conditions of the malfunction described by the customer). NOTE: Leave the ignition switch in the ON position until you have checked the DTCs, etc. After simulating malfunction conditions, use the hand-held tester diagnosis selector to check the DTCs and freeze frame data, etc. When you use hand-held tester: Select the item "DIAGNOSIS / ENHANCED OBD II / DTC INFO/CURRENT CODES". After checking the DTC, inspect the applicable circuit. See «DIAGNOSTIC TROUBLE CODE CHART»(ref-224756-S03603980872006031100000) to confirm the details of the DTCs.
2. DTC CLEAR When using the OBD II scan tool or hand-held tester: Clearing the DTCs. Connect the OBD II scan tool or hand-held tester to the DLC3. Turn the ignition switch to the ON position and turn the OBD II scan tool or the hand-held tester main switch on. When you use hand-held tester: Select the item "DIAGNOSIS / ENHANCED OBD II / DTC INFO/CLEAR CODES [YES] button". HINT: When operating the OBD II scan tool (complying with SAEJ1978) or hand-held tester to erase the codes, the DTCs and freeze frame data will be erased. (See the OBD II scan tool's instruction book for operating instructions.) When not using the OBD II scan tool or hand-held tester: Clearing the DTCs. Disconnect the battery terminal or remove the EFI and ETCS fuses from the engine room J/B for 60 seconds or more. However, if disconnecting the battery terminal, perform the "INITIALIZE (SEE «INITIALIZATION»(ref-224756-S35891037082006031100000) )" procedure.

Scheme 107

Scheme 108

1. FAIL-SAFE This function minimizes the loss of the ECT functions when any malfunction occurs in a sensor or solenoid. ATF (Automatic Transmission Fluid) temperature sensor: When the ATF temperature sensor has a malfunction, O/D upshift is prohibited. Counter gear speed sensor NC (Speed sensor NC): When the counter gear speed sensor has a malfunction, O/D upshift is prohibited. Shift solenoid valve DSL: When the solenoid valve DSL has a malfunction, the current to the solenoid valve is stopped. This stops lock-up control, then fuel economy decreases. Shift solenoid valve SL1, SL2 and S4: Fail safe function: If either of the shift solenoid valve circuits develops an open or short, the ECM turns the other shift solenoid "ON" and "OFF" in order to shift into the gear positions (Scheme 107)& (Scheme 108). Manual shifting (Scheme 107)& (Scheme 108) must be done (In case of a short circuit, the ECM stops sending the current to the short circuited solenoid). Even if starting the engine in the fail-safe mode, the gear position remains in the same position.

Scheme 109

Scheme 110

1. 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 hand-held tester: Select the item "DIAGNOSIS / ENHANCED OBD II / DATA LIST". According to the display on the tester, read the "DATA LIST".
2. 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. Push the "ON" button of the hand-held tester. Select the item "DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST". According to the display on the tester, perform the "ACTIVE TEST".

DIAGNOSTIC TROUBLE CODE CHART

If a DTC is displayed during the DTC check, check the parts listed in (Scheme 111) and proceed to the service category given.

Scheme 111

DTD Index

CIRCUIT DESCRIPTION

The park/neutral position switch detects the shift lever position and sends signals to the ECM.

Scheme 112

INSPECTION PROCEDURE

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.

1. Turn the ignition switch off.
2. Connect the OBD II scan tool or hand-held tester to the DLC3.
3. Turn the ignition switch to the ON position.
4. Push the "ON" button of the OBD II scan tool or the hand-held tester.
5. When you use hand-held tester: Select the item "DIAGNOSIS / ENHANCED OBD II / DATA LIST".
6. According to the display on the tester, read the "DATA LIST".

Scheme 113

Scheme 114

Scheme 115

Scheme 116

Scheme 117

Scheme 118

Scheme 119

1. INSPECT PARK/NEUTRAL POSITION SWITCH ASSY Disconnect the park/neutral position switch connector. Measure the resistance according to the value(s) in the table (Scheme 114)when the shift lever is moved to each position. Standard: NG: REPLACE PARK/NEUTRAL POSITION SWITCH ASSY (SEE «PARK/NEUTRAL POSITION SWITCH ASSY (ATM)»(ref-224780-S23645039032006031100000) ) OK: Go to next step.
2. INSPECT SHIFT LOCK CONTROL UNIT ASSY (TRANSMISSION CONTROL SWITCH) Connect the park/neutral position switch connector. Disconnect the transmission control switch connector of the shift lock control unit assy. Measure the resistance according to the value(s) in the table (Scheme 116)when the shift lever is moved to each position. Standard: NG: REPLACE SHIFT LOCK CONTROL UNIT ASSY (SEE «OVERHAUL»(ref-224780-S29908731552006031100000) ) OK: Go to next step.
3. CHECK HARNESS AND CONNECTOR (PARK/NEUTRAL POSITION SWITCH - ECM) Connect the transmission control switch connector of the shift lock control unit assy. Turn the ignition switch to the ON position, and measure the voltage according to the value(s) in the table (Scheme 118)when the shift lever is moved to each position. Standard: HINT: *: The voltage will drop slightly due to the turning on of the back up light. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (SEE «ELECTRONIC CIRCUIT INSPECTION PROCEDURE»(ref-224750-S28128780772006031100000) ) OK: REPLACE ECM (SEE «REPLACEMENT»(ref-224765-S19142744612006031100000) )

The ATF (Automatic Transmission Fluid) temperature sensor converts the fluid temperature into a resistance value which is input into the ECM.

The ECM applies a voltage to the temperature sensor through ECM terminal THO1.

The sensor resistance changes with the transmission fluid temperature. As the temperature becomes higher, the sensor resistance decreases.

One terminal of the sensor is grounded so that the sensor resistance decreases and the voltage goes down as the temperature becomes higher.

The ECM calculates the fluid temperature based on the voltage signal.

Scheme 120

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.

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. When you use hand-held tester: Select the item "DIAGNOSIS / ENHANCED OBD II / DATA LIST".
7. According to the display on the tester, read the "DATA LIST".

DATA LIST

HINT

When DTC P0712 is output and OBD II scan tool or hand-held tester output is 150°C (302°F), there is a short circuit.

When DTC P0713 is output and OBD II scan tool or hand-held tester output is -40°C (-40°F), there is an open circuit.

Measure the resistance between terminal THO1 (THO) and body ground.

TEMPERATURE DISPLAYED - MALFUNCTION

Scheme 121

Scheme 122

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 shown in «TRANSMISSION WIRE CONNECTOR SPECIFIED CONDITIONS»(ref-224756-S15093625172006031100000) . STANDARD: TRANSMISSION WIRE CONNECTOR SPECIFIED CONDITIONS Tester Connection Specified Condition 1 (THO) - 6 (E2) 90 ohm to 156 kohm HINT: Refer to the table shown in «TRANSMISSION WIRE CONNECTOR ATF TEMPERATURE AND SPECIFIED CONDITIONS»(ref-224756-S30236880042006031100000) for resistance values according to ATF oil temperature. TRANSMISSION WIRE CONNECTOR ATF TEMPERATURE AND SPECIFIED CONDITIONS ATF Temperature Specified Condition 10°C (50°F) 6.4 kohm 110°C (230°F) 0.2 kohm Measure the resistance according to the value(s) in the table shown in «TRANSMISSION WIRE CONNECTOR SPECIFIED CONDITIONS (CHECK FOR SHORT)»(ref-224756-S09977998522006031100000) . STANDARD (CHECK FOR SHORT): TRANSMISSION WIRE CONNECTOR SPECIFIED CONDITIONS (CHECK FOR SHORT) Tester Connection Specified Condition 1 (THO) - Body ground 10 kohm or higher 6 (E2) - Body ground NG: REPAIR OR REPLACE TRANSMISSION WIRE (SEE «TRANSMISSION WIRE (ATM)»(ref-224780-S14904518342006031100000) ) OK: Go to next step.
2. CHECK HARNESS AND CONNECTOR (TRANSMISSION WIRE - ECM) Connect the transmission wire connector to the transaxle. Disconnect the ECM connector. Measure the resistance according to the value(s) in the table shown in «TRANSMISSION WIRE - ECM SPECIFIED CONDITIONS»(ref-224756-S09289327502006031100000) . STANDARD: TRANSMISSION WIRE - ECM SPECIFIED CONDITIONS Tester Connection Specified Condition E7 - 32 (THO1) - E8 - 28 (E2) 90 ohm to 156 kohm HINT: Refer to the table shown in «TRANSMISSION WIRE - ECM ATF TEMPERATURE AND SPECIFIED CONDITIONS»(ref-224756-S35439668612006031100000) for resistance values according to ATF oil temperature. TRANSMISSION WIRE - ECM ATF TEMPERATURE AND SPECIFIED CONDITIONS ATF Temperature Specified Condition 10°C (50°F) 6.4 kohm 110°C (230°F) 0.2 kohm Measure the resistance according to the value(s) in the table shown in «TRANSMISSION WIRE - ECM SPECIFIED CONDITIONS (CHECK FOR SHORT)»(ref-224756-S20922071362006031100000) . STANDARD (CHECK FOR SHORT): TRANSMISSION WIRE - ECM SPECIFIED CONDITIONS (CHECK FOR SHORT): Tester Connection Specified Condition E7 - 32 (THO1) - Body ground 10 kohm or higher E8 - 28 (E2) - Body ground NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (SEE «ELECTRONIC CIRCUIT INSPECTION PROCEDURE»(ref-224750-S28128780772006031100000) ) OK: REPLACE ECM (SEE «REPLACEMENT»(ref-224765-S19142744612006031100000) )

The ATF (Automatic Transmission Fluid) temperature sensor converts the fluid temperature into a resistance value which is input into the ECM.

Scheme 123

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.

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. When you use hand-held tester: Select the item "DIAGNOSIS / ENHANCED OBD II / DATA LIST".
7. According to the display on the tester, read the "DATA LIST".

DATA LIST

HINT

When DTC P0712 is output and OBD II scan tool or hand-held tester output is 150°C (302°F), there is a short circuit.

When DTC P0713 is output and OBD II scan tool or hand-held tester output is -40°C (-40°F), there is an open circuit.

Measure the resistance between terminal THO1 (THO) and body ground.

THO1 (THO) AND BODY GROUND

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 DTC'S OUTPUT (IN ADDITION TO DTC P0711) Connect the OBD II scan tool or the hand-held tester to the DLC3. Turn the ignition switch to the ON position and turn the OBD II scan tool or the hand-held tester main switch ON. When you use hand-held tester: Select the item "DIAGNOSIS/ENHANCED OBD II / DTC INFO / CURRENT CODES". Read the DTCs using the OBD II scan tool or the hand-held tester. RESULT: DTC OUTPUT 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 the troubleshooting for those DTCs first. B: Go to DTC CHART (SEE «DIAGNOSTIC TROUBLE CODE CHART»(ref-224756-S03603980872006031100000) ) A: Go to next step.
2. CHECK TRANSAXLE FLUID LEVEL (SEE «ON-VEHICLE INSPECTION»(ref-224780-S32160115822006031100000) ) OK: Automatic transaxle fluid level is correct. NG: ADD FLUID OK: REPLACE TRANSMISSION WIRE (SEE «TRANSMISSION WIRE (ATM)»(ref-224780-S14904518342006031100000) )

This sensor detects the rotation speed of the input turbine. By comparing the input turbine speed signal (NT) with the counter gear speed sensor signal (NC), the ECM detects the shift timing of the gears and appropriately controls the engine torque and hydraulic pressure according to various conditions. Thus, providing smooth gear shift.

Scheme 124

Reference (Using an oscilloscope)

Check the waveform between the terminals NT+ and NT of the ECM connector.

STANDARD: (Scheme 125)

NT+ AND NT

Scheme 125

The purpose of this circuit is to prevent the engine from stalling while driving in lock-up condition when brakes are suddenly applied.

When the brake pedal is depressed, this switch sends a signal to the ECM. Then the ECM cancels the operation of the lock-up clutch while braking is in progress.

Scheme 126

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.

1. Turn the ignition switch off.
2. Connect the OBD II scan tool or hand-held tester to the DLC3.
3. Turn the ignition switch to the ON position.
4. Push the "ON" button of the OBD II scan tool or the hand-held tester.
5. When you use hand-held tester: Select the item "DIAGNOSIS / ENHANCED OBD II / DATA LIST".
6. According to the display on the tester, read the "DATA LIST".

Scheme 127

Scheme 128

Scheme 129

Scheme 130

Scheme 131

1. INSPECT STOP LAMP SWITCH ASSY Remove the stop lamp switch assy. Measure the resistance according to the value(s) in the table (Scheme 128) Standard: NG: REPLACE STOP LAMP SWITCH ASSY OK: Go to next step.
2. CHECK HARNESS AND CONNECTOR (STOP LAMP SWITCH ASSY - ECM) Connect the stop lamp switch assy connector. Measure the voltage according to the value(s) in the table (Scheme 130)when the brake pedal is depressed and released. Standard: NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (SEE «ELECTRONIC CIRCUIT INSPECTION PROCEDURE»(ref-224750-S28128780772006031100000) ) OK: REPLACE ECM (SEE «REPLACEMENT»(ref-224765-S19142744612006031100000) )

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.

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 the tester, perform the "ACTIVE TEST". LOCK UP TEST DETAILS AND DIAGNOSTIC NOTE Item Test Details Diagnostic Note LOCK UP [Test Details] Possible to check the DSL operation. Control the shift solenoid DSL to set the automatic transaxle to the lock-up condition. [Vehicle Condition] Vehicle Speed: 58 km/h (36 mph) or more HINT: This test can be conducted when the vehicle speed is 58 km/h (36 mph) or more. This test can be conducted in the 3rd or O/D gear.
8. Lightly depress the accelerator pedal and check that the engine speed does not change abruptly.

HINT

1. When changing the accelerator pedal opening angle while driving, if the engine speed does not change, lock-up is on.
2. 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 132

Scheme 133

Scheme 134

Scheme 135

1. CHECK OTHER DTCS OUTPUT (IN ADDITION TO DTC P0741) Connect the OBD II scan tool or the hand-held tester to the DLC3. Turn the ignition switch to the ON position and turn the OBD II scan tool or the hand-held tester main switch ON. When you use hand-held tester: Select the item "DIAGNOSIS / ENHANCED OBD II / DTC INFO/CURRENT CODES". Read the DTCs using the OBD II scan tool or the hand-held tester. RESULT: DTC OUTPUT 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. NG: GO TO DTC CHART (SEE «DIAGNOSTIC TROUBLE CODE CHART»(ref-224756-S03603980872006031100000) ) 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 shown in «TRANSMISSION WIRE (DSL) SPECIFIED CONDITIONS»(ref-224756-S32025019882006031100000) . STANDARD: TRANSMISSION WIRE (DSL) SPECIFIED CONDITIONS Tester Connection Specified Condition 20°C (68°F) 3 - Body ground 11 to 13 ohm 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 «TRANSMISSION WIRE - ECM SPECIFIED CONDITIONS»(ref-224756-S18117290672006031100000) . STANDARD: TRANSMISSION WIRE - ECM SPECIFIED CONDITIONS Tester Connection Specified Condition 20°C (68°F) E7 - 9 (DSL) - Body ground 11 to 13 ohm NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (SEE «ELECTRONIC CIRCUIT INSPECTION PROCEDURE»(ref-224750-S28128780772006031100000) ) 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 shown in «SHIFT SOLENOID VALVE (DSL) SPECIFIED CONDITIONS»(ref-224756-S19183251202006031100000) . STANDARD: SHIFT SOLENOID VALVE (DSL) SPECIFIED CONDITIONS Tester Connection Specified Condition 20°C (68°F) Solenoid Connector (DSL) - Solenoid Body (DSL) 11 to 13 ohm 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 noise. NG: REPLACE SHIFT SOLENOID VALVE (DSL) OK: Go to next step.
5. CHECK TRANSMISSION WIRE (SEE «ELECTRONIC CIRCUIT INSPECTION PROCEDURE»(ref-224750-S28128780772006031100000) ) OK: The connectors and pins are securely installed. There is no open or short on the wire harness. NG: REPAIR OR REPLACE TRANSMISSION WIRE (SEE «TRANSMISSION WIRE (ATM)»(ref-224780-S14904518342006031100000) ) OK: Go to next step.
6. INSPECT TRANSMISSION VALVE BODY ASSY OK: There are no foreign objects on each valve. NG: REPAIR OR REPLACE TRANSMISSION VALVE BODY ASSY (SEE «TRANSMISSION VALVE BODY ASSY (ATM)»(ref-224780-S31099181312006031100000) ) OK: Go to next step.
7. INSPECT TORQUE CONVERTER CLUTCH ASSY (SEE «TORQUE CONVERTER CLUTCH AND DRIVER PLATE (ATM)»(ref-224780-S16058466302006031100000) ) OK: The torque converter clutch operates normally. NG: REPLACE TORQUE CONVERTER CLUTCH ASSY OK: REPAIR AUTOMATIC TRANSAXLE ASSY (SEE «REPLACEMENT»(ref-224780-S03150983572006031100000) )

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.

1. Turn the ignition switch off.
2. Connect the hand-held tester to the DLC3.
3. Turn the ignition switch to the ON position.
4. Push the "ON" button of the hand-held tester.
5. Select the item "DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST / SHIFT".
6. 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 ).

SHIFT TEST DETAILS AND DIAGNOSTIC NOTE

HINT

1. This test can be conducted when the vehicle speed is 50 km/h (31 mph) or less.
2. The shift position commanded by the ECM is shown in the DATA LIST/SHIFT display on the hand-held tester.

Scheme 136

1. CHECK OTHER DTCS OUTPUT (IN ADDITION TO DTC P0746) Connect the OBD II scan tool or the hand-held tester to the DLC3. Turn the ignition switch to the ON position and turn the OBD II scan tool or the hand-held tester main switch ON. When you use hand-held tester: Select the item "DIAGNOSIS / ENHANCED OBD II / DTC INFO / CURRENT CODES". Read the DTCs using the OBD II scan tool or the hand-held tester. RESULT: DTC OUTPUT Display (DTC output) Proceed to Only "P0746" is output A "P0746" and other DTCs B HINT: If any other codes besides "P0746" are output, perform the troubleshooting for those DTCs first. B: Go to DTC CHART (SEE «DIAGNOSTIC TROUBLE CODE CHART»(ref-224756-S03603980872006031100000) ) A: Go to next step.
2. INSPECT SHIFT SOLENOID VALVE (SL1) Remove the shift solenoid valve SL1. Measure the resistance according to the value(s) in the table shown in «SHIFT SOLENOID VALVE (SL1) SPECIFIED CONDITIONS»(ref-224756-S30795246762006031100000) . STANDARD: SHIFT SOLENOID VALVE (SL1) SPECIFIED CONDITIONS Tester Connection Specified Condition 20°C (68°F) 1 - 2 5.0 to 5.6 ohm 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 noise. NG: REPLACE SHIFT SOLENOID VALVE (SL1) OK: Go to next step.
3. INSPECT TRANSMISSION VALVE BODY ASSY OK: There are no foreign objects on each valve. NG: REPAIR OR REPLACE TRANSMISSION VALVE BODY ASSY (SEE «PROBLEM SYMPTOMS TABLE»(ref-224756-S30496037202006031100000) ) OK: Go to next step.
4. INSPECT TORQUE CONVERTER CLUTCH ASSY (SEE «TORQUE CONVERTER CLUTCH AND DRIVER PLATE (ATM)»(ref-224780-S16058466302006031100000) ) OK: The torque converter clutch operates normally. NG: REPLACE TORQUE CONVERTER CLUTCH ASSY OK: REPAIR OR REPLACE AUTOMATIC TRANSAXLE ASSY (SEE «REPLACEMENT»(ref-224780-S03150983572006031100000) )

Shifting from 1st to O/D is performed in combination with "ON" and "OFF" operation of the shift solenoid valves SL1 and SL2 which are controlled by the ECM. If an open or short circuit occurs in either of the shift solenoid valves, the ECM controls the remaining normal shift solenoid valves to allow the vehicle to be operated smoothly (Fail safe function).

Scheme 137

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.

1. Turn the ignition switch off.
2. Connect the hand-held tester to the DLC3.
3. Turn the ignition switch to the ON position.
4. Push the "ON" button of the hand-held tester.
5. Select the item "DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST / SHIFT".
6. 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 ).

SHIFT TEST DETAILS AND DIAGNOSTIC NOTE

HINT

1. This test can be conducted when the vehicle speed is 50 km/h (31 mph) or less.
2. The shift position commanded by the ECM is shown in the DATA LIST/SHIFT display on the hand-held tester.

Scheme 138

1. CHECK OTHER DTCS OUTPUT (IN ADDITION TO DTC P0766) Connect the OBD II scan tool or the hand-held tester to the DLC3. Turn the ignition switch to the ON position and turn the OBD II scan tool or the hand-held tester main switch ON. When you use hand-held tester: Select the item "DIAGNOSIS / ENHANCED OBD II / DTC INFO / CURRENT CODES". Read the DTCs using the OBD II scan tool or the hand-held tester. RESULT: DTC OUTPUT Display (DTC output) Proceed to Only "P0766" is output A "P0766" and other DTCs B HINT: If any other codes besides "P0766" are output, perform the troubleshooting for those DTCs first. B: Go to DTC CHART (SEE «DIAGNOSTIC TROUBLE CODE CHART»(ref-224756-S03603980872006031100000) ) A: Go to next step.
2. INSPECT SHIFT SOLENOID VALVE (S4) Remove the shift solenoid valve S4. Measure the resistance according to the value(s) in the table shown in «SHIFT SOLENOID VALVE (S4) SPECIFIED CONDITIONS»(ref-224756-S22106030432006031100000) . STANDARD: SHIFT SOLENOID VALVE (S4) SPECIFIED CONDITIONS Tester Connection Specified Condition 20°C (68°F) Solenoid Connector (S4) - Solenoid Body (S4) 11 to 15 ohm Connect the positive (+) lead to the terminal of the solenoid connector, and the negative (-) lead to the solenoid body. OK: The solenoid makes an operating noise. NG: REPLACE SHIFT SOLENOID VALVE (S4) OK: Go to next step.
3. INSPECT TRANSMISSION VALVE BODY ASSY OK: There are no foreign objects on each valve. NG: REPAIR OR REPLACE TRANSMISSION VALVE BODY ASSY (SEE «TRANSMISSION VALVE BODY ASSY (ATM)»(ref-224780-S31099181312006031100000) ) OK: Go to next step.
4. INSPECT TORQUE CONVERTER CLUTCH ASSY (SEE «TORQUE CONVERTER CLUTCH AND DRIVER PLATE (ATM)»(ref-224780-S16058466302006031100000) ) OK: The torque converter clutch operates normally. NG: REPLACE TORQUE CONVERTER CLUTCH ASSY OK: REPAIR OR REPLACE AUTOMATIC TRANSAXLE ASSY (SEE «REPLACEMENT»(ref-224780-S03150983572006031100000) )

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.

1. Turn the ignition switch off.
2. Connect the hand-held tester to the DLC3.
3. Turn the ignition switch to the ON position.
4. Push the "ON" button of the hand-held tester.
5. Select the item "DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST / SHIFT".
6. 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 ).

SHIFT TEST DETAILS AND DIAGNOSTIC NOTE

HINT

1. This test can be conducted when the vehicle speed is 50 km/h (31 mph) or less.
2. The shift position commanded by the ECM is shown in the DATA LIST/SHIFT display on the hand-held tester.

Scheme 139

1. CHECK OTHER DTCS OUTPUT (IN ADDITION TO DTC P0776) Connect the OBD II scan tool or the hand-held tester to the DLC3. Turn the ignition switch to the ON position and turn the OBD II scan tool or the hand-held tester main switch ON. When you use hand-held tester: Select the item "DIAGNOSIS / ENHANCED OBD II / DTC INFO / CURRENT CODES". Read the DTCs using the OBD II scan tool or the hand-held tester. RESULT: DTC OUTPUT Display (DTC output) Proceed to Only "P0776" is output A "P0776" and other DTCs B HINT: If any other codes besides "P0776" are output, perform the troubleshooting for those DTCs first. B: Go to DTC CHART (SEE «DIAGNOSTIC TROUBLE CODE CHART»(ref-224756-S03603980872006031100000) ) A: Go to next step.
2. INSPECT SHIFT SOLENOID VALVE (SL2) Remove the shift solenoid valve SL2. Measure the resistance according to the value(s) in the table shown in «SHIFT SOLENOID VALVE (SL2) SPECIFIED CONDITIONS»(ref-224756-S09542480862006031100000) . STANDARD: SHIFT SOLENOID VALVE (SL2) SPECIFIED CONDITIONS Tester Connection Specified Condition 20°C (68°F) 1 - 2 5.0 to 5.6 ohm 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 noise. NG: REPLACE SHIFT SOLENOID VALVE (SL2) OK: Go to next step.
3. INSPECT TRANSMISSION VALVE BODY ASSY OK: There are no foreign objects on each valve. NG: REPAIR OR REPLACE TRANSMISSION VALVE BODY ASSY (SEE «TRANSMISSION VALVE BODY ASSY (ATM)»(ref-224780-S31099181312006031100000) ) OK: Go to next step.
4. INSPECT TORQUE CONVERTER CLUTCH ASSY (SEE «TORQUE CONVERTER CLUTCH AND DRIVER PLATE (ATM)»(ref-224780-S16058466302006031100000) ) OK: The torque converter clutch operates normally. NG: REPLACE TORQUE CONVERTER CLUTCH ASSY OK: REPAIR OR REPLACE AUTOMATIC TRANSAXLE ASSY (SEE «REPLACEMENT»(ref-224780-S03150983572006031100000) )

Shifting from 1st to O/D is performed in combination with "ON" and "OFF" operation of the shift solenoid valves SL1 and SL2 which are controlled by the ECM. If an open or short circuit occurs in either of the shift solenoid valves, the ECM controls the remaining normal shift solenoid valves to allow the vehicle to be operated smoothly (Fail safe function).

Scheme 140

This sensor detects the rotation speed of the counter gear. By comparing the counter gear speed signal (NC) with the direct clutch speed sensor signal (NT), the ECM detects the shift timing of the gears and appropriately controls the engine torque and hydraulic pressure according to various conditions. Thus smooth gear shifting is performed.

Scheme 141

Reference (Using an oscilloscope)

Check the waveform between terminals NC+ and NC- of the ECM connector.

STANDARD: (Scheme 142)

WAVEFORM REFERENCE

Scheme 142

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.

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. When you use hand-held tester: Select the item "DIAGNOSIS / ENHANCED OBD II / DATA LIST".
7. According to the display on the tester, read the "DATA LIST".

DATA LIST

HINT

1. SPD (NC) is always 0 while driving: Open or short in the sensor or circuit.
2. 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.

Scheme 143

Scheme 144

Scheme 145

Scheme 146

1. 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.
2. INSPECT SPEED SENSOR (NC) Disconnect the speed sensor connector from the transaxle. Measure the resistance according to the value(s) in the table shown in «SPEED SENSOR (NC) SPECIFIED CONDITIONS»(ref-224756-S17583105852006031100000). STANDARD: SPEED SENSOR (NC) SPECIFIED CONDITIONS Tester Connection Specified Condition 20°C (68°F) 1 - 2 560 to 680 ohm NG: REPLACE SPEED SENSOR (NC) OK: Go to next step.
3. 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 shown in «SPEED SENSOR - ECM SPECIFIED CONDITIONS»(ref-224756-S14995693392006031100000). STANDARD: SPEED SENSOR - ECM SPECIFIED CONDITIONS Tester Connection Specified Condition 20°C (68°F) E7 - 26 (NC+) - E7 - 34 (NC-) 560 to 680 ohm Measure the resistance according to the value(s) in the table (Scheme 145) NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (SEE «ELECTRONIC CIRCUIT INSPECTION PROCEDURE»(ref-224750-S28128780772006031100000) ) OK: REPLACE ECM (SEE «REPLACEMENT»(ref-224765-S19142744612006031100000) )

Shifting from 1st to O/D is performed in combination with "ON" and "OFF" operation of the shift solenoid valves SL1 and SL2 which are controlled by the ECM. If an open or short circuit occurs in either of the shift solenoid valves, the ECM controls the remaining normal shift solenoid valves to allow the vehicle to be operated smoothly (Fail safe function).

Scheme 147

The linear solenoid valve (SLT) controls the transmission line pressure for smooth transmission operation based on signals from the throttle position sensor and the vehicle speed sensor. The ECM adjusts the duty cycle of the SLT solenoid valve to control hydraulic line pressure coming from the primary regulator valve. Appropriate line pressure assures smooth shifting with varying engine outputs.

(*): Duty Ratio

The duty ratio is the ratio of the period of continuity in one cycle. For example, if A is the period of continuity in one cycle, and B is the period of non-continuity, then

Duty Ratio = A/(A + B) x 100(%)

Scheme 148

Scheme 149

Scheme 150

The shift solenoid valve DSL is turned "ON" and "OFF" by signals from the ECM in order to control the hydraulic pressure operation, the lock-up relay valve, which then controls operation of the lock-up clutch.

Scheme 151