Automatic Transmission (Diagnostics - Introduction) (U341E): Diagnosis Toyota Corolla XI

ROAD TEST [08/2013 - ]

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 Perform a road test. WARNING: Check for safety before performing any tests. NOTE: Be sure to inspect and adjust the engine before performing these tests. Perform the road test with the engine coolant temperature between 60 and 100°C (140 and 212°F) and the ATF temperature between 50 and 80°C (122 and 176°F). Perform these tests with the air conditioning off and cruise control off. Inspection Procedure Transmission Control Switch Test With the vehicle stationary and the shift lever in D, move the shift lever to 3 and return it to D. Check that the meter display changes from D to the appropriate 3 range and then back again. D Position Shift Test While driving the vehicle normally, check that the transmission shifts up and down through each gear properly. Lock-up Function While driving on a level surface at a constant speed in the lock-up range (75 km/h (47 mph) or more) with the shift lever in D, lightly depress the accelerator pedal and check that the engine speed does not change abruptly. P Position Test Stop the vehicle on an incline (approximately 5° or more). Then move the shift lever to P and release the parking brake. Check that the parking lock pawl holds the vehicle in place. Abnormal Noise and Vibration Check for abnormal noise and vibration while driving the vehicle forward and backward, and during shift operations. Fluid Leakage After performing all other road test inspections, check for fluid leakage.

PROBLEM SYMPTOMS TABLE [08/2013 - ]

HINT

1. Use the table below to help determine the cause of the problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.
2. The problem symptoms table is divided into 2 chapters. When troubleshooting, check Chapter 1 first. If instructions are given in Chapter 1 to proceed to 2, proceed as instructed.
3. If the instruction "Proceed to next circuit inspection shown in problem symptoms table" is given in the flowchart for each circuit, proceed to the next suspected area in the table.
4. If the problem still occurs even though there are no malfunctions in any of the circuits, check the ECM and replace it if necessary.
5. *: When the circuit is defective, a DTC may be output.

CHAPTER 1: ELECTRONIC CIRCUIT

CHAPTER 2: ON-VEHICLE REPAIR AND OFF-VEHICLE REPAIR

Scheme 1

1. ECM HINT: The standard voltage between each pair of ECM terminals is shown in the table below. The appropriate conditions for checking each pair of terminals are also indicated. The result of checks should be compared with the standard voltage for that pair of terminals, displayed in the "Specified Condition" column. The illustration above can be used as a reference to identify the ECM terminal locations. Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition A40-9 (STP) - B33-16 (E1) L - BR Stop light switch signal Brake pedal depressed 7.5 to 14 V Brake pedal released Below 1.5 V B33-76 (NSW) - B33-16 (E1) W - BR Park neutral switch signal Ignition switch ON and shift lever in P and N Below 2 V Ignition switch ON and shift lever not in P and N 11 to 14 V B33-99 (P) - B33-16 (E1) V - BR Park position switch signal Ignition switch ON and shift lever in P 11 to 14 V Ignition switch ON and shift lever not in P Below 1 V B33-79 (R) - B33-16 (E1) R - BR R shift position switch signal Ignition switch ON and shift lever in R 11 to 14 V Ignition switch ON and shift lever not in R Below 1 V B33-97 (N) - B33-16 (E1) G - BR Neutral position switch signal Ignition switch ON and shift lever in N 11 to 14 V Ignition switch ON and shift lever not in N Below 1 V B33-81 (D) - B33-16 (E1) GR - BR D shift position switch signal Ignition switch ON and shift lever in D and 3 11 to 14 V Ignition switch ON and shift lever not in D and 3 Below 1 V A40-58 (3(SDSW)) - B33-16 (E1) P - BR 3 shift position switch signal Ignition switch ON and shift lever in 3 11 to 14 V Ignition switch ON and shift lever not in 3 Below 1 V B33-101 (2) - B33-16 (E1) LG - BR 2 shift position switch signal Ignition switch ON and shift lever in 2 11 to 14 V Ignition switch ON and shift lever not in 2 Below 1 V B33-98 (L) - B33-16 (E1) SB - BR L shift position switch signal Ignition switch ON and shift lever in L 11 to 14 V Ignition switch ON and shift lever not in L Below 1 V B33-70 (S1) - B33-16 (E1) L - BR S1 solenoid signal Ignition switch ON 11 to 14 V 1st or 2nd gear 11 to 14 V 3rd or 4th gear Below 1 V B33-69 (S2) - B33-16 (E1) SB - BR S2 solenoid signal Ignition switch ON 11 to 14 V 1st or 4th gear 11 to 14 V 2nd or 3rd gear Below 1 V B33-48 (SLU+) - B33-47 (SLU-) P - W SLU solenoid signal Ignition switch ON Below 1 V B33-71 (ST) - B33-16 (E1) R - BR ST solenoid signal Ignition switch ON Below 1 V Ignition switch ON and R gear 11 to 14 V B33-67 (SLT+) - B33-66 (SLT-) LG - V SLT solenoid signal Engine idle speed Pulse generation B33-127 (NT+) - B33-128 (NT-) LG - V Transmission revolution sensor (NT) signal Vehicle speed 20 km/h (12 mph) Pulse generation B33-95 (THO1) - B33-96 (ETHO) Y - GR ATF temperature sensor signal ATF temperature: 115°C (239°F) or more Below 1.5 V

Scheme 2

1. DESCRIPTION When troubleshooting OBD II (On-Board Diagnostics) vehicles, an OBD II scan tool (complying with SAE J1987) must be connected to the DLC3 (Data Link Connector 3) of the vehicle. Various data in the vehicle ECM (Engine Control Module) can be then read. OBD II regulations require that the vehicle on-board computer illuminate the MIL (Malfunction Indicator Lamp) on the instrument panel when the computer detects a malfunction in: The emission control system components. The powertrain control components (which affect vehicle emissions). The computer itself. In addition, the applicable DTCs prescribed by SAE J2012 are recorded in the ECM memory. If the malfunction does not recur in 3 consecutive trips, the MIL turns off automatically but the DTCs remain recorded in the ECM memory. To check for DTCs, connect the Techstream to the DLC3. The Techstream displays DTCs, freeze frame data, and a variety of the engine data. The DTCs and freeze frame data can be cleared with the Techstream. In order to enhance OBD function on vehicles and develop the off-board diagnosis system, Controller Area Network (CAN) communication is used in this system. CAN is a network which uses a pair of data transmission lines spanning multiple computers and sensors. It allows for high speed communications between the systems and simplification of the wire harness connections. Refer to «DTC CHECK / CLEAR [08/2013 - ]»(ref-635451-S23043650912014070300000)
2. 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 as an option for technicians. In check mode, 1 trip detection logic is used for duplicating malfunction symptoms and increasing the system's ability to detect malfunctions, including intermittent problems (Techstream only).
3. 2 TRIP DETECTION LOGIC When a malfunction is first detected, the malfunction is temporarily stored in the ECM memory (1st trip). If the same malfunction is detected during the subsequent driving cycle, the MIL is illuminated (2nd trip).
4. FREEZE FRAME DATA The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was moving or stationary, whether the engine was warmed up or not, whether the air fuel ratio was lean or rich, as well as other data stored at the time of a malfunction.
5. DLC3 (Data Link Connector 3) Check the DLC3. Refer to «GENERAL INFORMATION [08/2013 - ]»(ref-635429-S24386271762014070300000)
6. BATTERY VOLTAGE Standard Voltage 11 to 14 V If voltage is below 11 V, replace or recharge the battery.
7. MIL (Malfunction Indicator Lamp) The MIL is illuminated when the ignition switch is turned to ON (the engine is not running). The MIL turns off when the engine is started. If the MIL remains illuminated, the diagnosis system has detected a malfunction or abnormality in the system. HINT: If the MIL is not illuminated when the ignition switch is turned to ON, check the MIL circuit. Refer to «MIL Circuit [08/2013 - ]»(ref-635617-S21432875312014070300000)

DTC CHECK / CLEAR [08/2013 - ]

Note. When the diagnosis system is changed from normal mode to check mode or vice versa, all DTCs and freeze frame data recorded in normal mode are cleared. Before changing modes, always check and make a note of DTCs and freeze frame data.

HINT

1. DTCs which are stored in the ECM can be displayed on the Techstream. The Techstream can display current, pending and permanent DTCs.
2. If a malfunction is detected during the current driving cycle, current and permanent DTCs are stored.
3. Some DTCs are not stored if the ECM does not detect the same malfunction again during a second consecutive driving cycle. However, such malfunctions, detected on only one occasion, are stored as pending DTCs.
4. Current and pending DTCs can be cleared by using the Techstream or by disconnecting the cable from the negative battery terminal. However, permanent DTCs cannot be cleared using either of these two methods.
5. After clearing current DTCs using the Techstream (or by disconnecting the cable from the negative battery terminal), permanent DTCs can be cleared when the system is determined to be normal for the relevant DTCs and then the universal trip is performed.

2 TRIP DETECTION EXAMPLES

Scheme 3

Scheme 4

Scheme 5

1. CHECK DTC Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes. Powertrain > Engine and ECT > Trouble Codes Check the DTC(s) and freeze frame data, and then write them down. Check the details of the DTC(s). Refer to «DIAGNOSTIC TROUBLE CODE CHART [08/2013 - ]»(ref-635451-S07754300462014070300000) Powertrain > Engine and ECT > Trouble Codes
2. CLEAR DTC (Pending and Current DTC) Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes. Powertrain > Engine and ECT > Trouble Codes Clear the DTCs.
3. CLEAR PERMANENT DTC HINT: Even if the following procedure is not performed, permanent DTCs are cleared if no malfunctions are detected during 3 consecutive driving cycles. Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes. Powertrain > Engine and ECT > Trouble Codes Check if permanent DTCs are stored. HINT: If permanent DTCs are not output, it is not necessary to continue this procedure. Clear the DTCs. Powertrain > Engine and ECT > Clear DTCs Perform the universal trip. Idle the engine for 30 seconds or more. Drive the vehicle at 40 km/h (25 mph) or more for a total of 5 minutes or more. HINT: It is possible to complete the drive pattern even if the vehicle decelerates to less than 40 km/h (25 mph) during the driving cycle provided that the vehicle is driven at 40 km/h (25 mph) or more for a total of 5 minutes. When accelerating through the gears, make sure the vehicle is driven so all gears are used in order and no gears are skipped. Allow 10 minutes or more to elapse from the time the engine is started. Turn the ignition switch off. Wait 15 seconds. Turn the ignition switch to ON. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes. Powertrain > Engine and ECT > Trouble Codes Check that the permanent DTCs have been cleared. HINT: If permanent DTCs have not been cleared, perform the universal trip again. Permanent DTCs are cleared when the universal trip is completed.

Scheme 6

1. DESCRIPTION Check mode has a higher sensitivity to malfunctions and can detect malfunction that normal mode cannot detect. Check mode can also detect all the malfunctions that normal mode can detect. In check mode, DTCs are detected with 1-trip detection logic.
2. CHECK MODE PROCEDURE Make sure that the following conditions are met: The battery voltage is 11 V or more. The throttle valve is fully closed. The shift lever is in P or N. The A/C is off. Turn the ignition switch off. Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Powertrain / Engine and ECT / Utility / Check Mode. Powertrain > Engine and ECT > Utility Tester Display Check Mode Change the ECM to check mode. Make sure the MIL flashes as shown in the illustration. NOTE: All DTCs and freeze frame data will be cleared if: 1) the Techstream 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 ON to on ACC or off. Before entering check mode, make a note of the DTCs and freeze frame data. Start the engine. The MIL should turn off after the engine starts. Perform Monitor Drive Pattern for the ECT test. Refer to «MONITOR DRIVE PATTERN [08/2013 - ]»(ref-635451-S22109937072014070300000) (Or, simulate the conditions of the malfunction described by the customer.) After simulating the malfunction conditions, use the Techstream to check the DTC and freeze frame data.

DATA LIST / ACTIVE TEST [08/2013 - ]

1. DATA LIST HINT: Using the Techstream to read the Data List allows the values or states of switches, sensors, actuators and other items to be read without removing any parts. This non-intrusive inspection can be very useful because intermittent conditions or signals may be discovered before parts or wiring is disturbed. Reading the Data List information early in troubleshooting is one way to save diagnostic time. NOTE: In the table below, the values listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whether a part is faulty or not. Warm up the engine. Turn the ignition switch off. Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn on the Techstream. Enter the following menus: Powertrain / Engine and ECT / Data List. According to the display on the Techstream, read the "Data List". Powertrain > Engine and ECT > Data List Tester Display Measurement Item Range Normal Condition Diagnostic Note Neutral Control Neutral control status OFF or ON - - N Range Status Judgment for shift lever N position OFF or ON - - Starter Signal Starter signal ON or OFF ON: Starter operating OFF: Starter not operating - Neutral Position SW Signal Neutral position switch signal ON or OFF ON: Shift lever in P or N - Stop Light Switch Stop light switch ON or OFF ON: Brake pedal depressed OFF: Brake pedal released - TC and TE1 TC and CG (TE1) terminals of DLC3 ON or OFF - - SPD (NT) Input turbine speed Min.: 0 RPM Max.: 12750 RPM Lock-up ON (After warming up the engine): Input turbine speed (NT) equal to the engine speed. Lock-up OFF (Idling with the shift lever in P or N): Input turbine speed (NT) nearly equal to the engine speed. Data is displayed in increments of 50 RPM. Shift SW Status (P Range) Park/neutral position switch status ON or OFF ON: Shift lever in P OFF: Shift lever not in P When the shift lever position displayed on the Techstream differs from the actual position, the adjustment of the park/neutral position switch or shift cable may be incorrect. HINT: If a malfunction still occurs even after adjusting these parts, refer to DTC P0705*. Shift SW Status (R Range) Park/neutral position switch status ON or OFF ON: Shift lever in R OFF: Shift lever not in R When the shift lever position displayed on the Techstream differs from the actual position, the adjustment of the park/neutral position switch or shift cable may be incorrect. HINT: If a malfunction still occurs even after adjusting these parts, refer to DTC P0705*. Shift SW Status (2 Range) Park/neutral position switch status ON or OFF ON: Shift lever in 2 OFF: Shift lever not in 2 When the shift lever position displayed on the Techstream differs from the actual position, the adjustment of the park/neutral position switch or shift cable may be incorrect. HINT: If a malfunction still occurs even after adjusting these parts, refer to DTC P0705*. Shift SW Status (L Range) Park/neutral position switch status ON or OFF ON: Shift lever in L OFF: Shift lever not in L When the shift lever position displayed on the Techstream differs from the actual position, the adjustment of the park/neutral position switch or shift cable may be incorrect. HINT: If a malfunction still occurs even after adjusting these parts, refer to DTC P0705*. Shift SW Status (N Range) Park/neutral position switch status ON or OFF ON: Shift lever in N OFF: Shift lever not in N When the shift lever position displayed on the Techstream differs from the actual position, the adjustment of the park/neutral position switch or shift cable may be incorrect. HINT: If a malfunction still occurs even after adjusting these parts, refer to DTC P0705*. Shift SW Status (N, P Range) Supported Status of park/neutral position switch (N or P) supported Supp or Unsupp - - Shift SW Status (N, P Range) Park/neutral position switch status ON or OFF ON: Shift lever in P or N OFF: Shift lever not in P or N When the shift lever position displayed on the Techstream differs from the actual position, the adjustment of the park/neutral position switch or shift cable may be incorrect. HINT: If a malfunction still occurs even after adjusting these parts, refer to DTC P0705*. Shift SW Status (D Range) Park/neutral position switch status ON or OFF ON: Shift lever in D or 3 OFF: Shift lever not in D or 3 When the shift lever position displayed on the Techstream differs from the actual position, the adjustment of the park/neutral position switch or shift cable may be incorrect. HINT: If a malfunction still occurs even after adjusting these parts, refer to DTC P0705*. Shift SW Status (3 Range) Park/neutral position switch status ON or OFF ON: Shift lever in 3 OFF: Shift lever not in 3 When the shift lever position displayed on the Techstream differs from the actual position, the adjustment of the park/neutral position switch or shift cable may be incorrect. HINT: If a malfunction still occurs even after adjusting these parts, refer to DTC P0705*. A/T Oil Temperature 1 ATF temperature sensor value Min.: -40°C (-40°F) Max.: 215°C (419°F) After stall test: Approximately 80°C (176°F) Equal to ambient temperature when engine cold If the value is -40°C (-40°F) or 215°C (419°F), the ATF temperature sensor circuit is open or shorted. Lock Up Lock Up status ON or OFF ON: Lock-up operating OFF: Lock-up not operating - ST Solenoid Status Shift solenoid ST status ON or OFF Up-shifting and down-shifting between 3rd and 4th gear while driving: OFF --> ON --> OFF - Shift Status Actual Gear Position 1st, 2nd, 3rd or 4th 1st, 2nd, 3rd or 4th: Shift lever in D - SLT Solenoid Status Shift solenoid SLT status ON or OFF ON: Shift solenoid SLT operating OFF: Shift solenoid SLT not operating - SLU Solenoid Status Shift solenoid SLU status ON or OFF ON: Shift solenoid SLU operating OFF: Shift solenoid SLU not operating - HINT: *: Refer to DTC P0705. Refer to «DTC P0705: Transmission Range Sensor Circuit Malfunction (PRNDL Input) [08/2013 - ]»(ref-635649-S08586392032014070300000)
2. ACTIVE TEST HINT: Using the Techstream to perform Active Tests allows relays, VSVs, actuators and other items to be operated without removing any parts. This non-intrusive functional inspection can be very useful because intermittent operation may be discovered before parts or wiring is disturbed. Performing Active Tests early in troubleshooting is one way to save diagnostic time. Data List information can be displayed while performing Active Tests. Warm up the engine. Turn the ignition switch off. Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn on the Techstream. Enter the following menus: Powertrain / Engine and ECT / Active Test. According to the display on the Techstream, perform the "Active Test". Powertrain > Engine and ECT > Active Test Tester Display Measurement Item Control Range Diagnostic Note Activate the Solenoid (SLU) Operate shift solenoid valve SLU ON or OFF [Vehicle Condition] Vehicle Stopped Shift lever in P or N Activate the Solenoid (SLT) Operate shift solenoid valve SLT and raise line pressure ON or OFF HINT: OFF: Line pressure up (when Active Test "Activate the Solenoid (SLT)" performed, ECM commands shift solenoid valve SLT to turn off) ON: No action (normal operation) [Vehicle Condition] Vehicle Stopped IDL: ON Activate the Solenoid (S1) Operate shift solenoid valve S1 ON or OFF [Vehicle Condition] Vehicle Stopped IDL: ON Activate the Solenoid (S2) Operate shift solenoid valve S2 ON or OFF [Vehicle Condition] Vehicle Stopped IDL: ON Activate the Lock Up Control shift solenoid valve SLU to set automatic transaxle to the lock-up condition. ON or OFF Possible to check shift solenoid valve SLU operation. [Vehicle Condition] Vehicle speed: 60 km/h (36 mph) or more Control the Shift Position Operate shift solenoid valves and set each shift position by yourself. Press "-->" button: Shift up Press "<--" button: Shift down Possible to check operation of the shift solenoid valves. [Vehicle Condition] IDL: ON Vehicle speed: 50 km/h (30 mph) or less Activate the Solenoid (ST) Operate shift solenoid valve ST ON or OFF [Vehicle Condition] Vehicle Stopped IDL: ON HINT: The "Activate the solenoid (SLT)" Active Test is performed to allow confirmation that the line pressure changes. The line pressure changes are confirmed using the same SST that is used for the Hydraulic Test. Refer to «HYDRAULIC TEST [08/2013 - ]»(ref-635451-S34973979842014070300000) Note that the pressure readings for the Active Test and Hydraulic Test are different.

DIAGNOSTIC TROUBLE CODE CHART [08/2013 - ]

AUTOMATIC TRANSAXLE SYSTEM