INSPECTION PROCEDURE Scion tC I

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