Engine Control System (Diagnostics - Introduction): Other Scion tC II рестайлинг

PRECAUTION [05/2013 - ]

1. IGNITION SWITCH EXPRESSIONS The type of ignition switch used on this model differs according to the specifications of the vehicle. The expressions listed in the table below are used in this Service Information. Expression Ignition Switch (Position) Engine Switch (Condition) Ignition Switch off LOCK Off (Lock) Ignition Switch ACC ACC On (ACC) Ignition Switch ON ON On (IG) Engine Start START On (Start)
2. INITIALIZATION NOTE: Perform initialization (throttle position) after replacing the throttle with motor body assembly or cleaning any throttle body components. Refer to «INSTALLATION [05/2013 - ] - Step 6»(ref-615228-S26835587592014050900000) . Perform Registration (VIN registration) when replacing the ECM. Refer to «REGISTRATION [05/2013 - ]»(ref-615120-S10374678432014050900000) .
3. WHEN USING TECHSTREAM WARNING: When using the Techstream, observe the following items for safety reasons: Read the Techstream instruction books before using the Techstream. Make sure that the Techstream cable is not caught on the pedals, shift lever and steering wheel when driving with the Techstream connected to the vehicle. When driving the vehicle for testing purposes while using the Techstream, 2 persons are required. One person drives the vehicle and the other operates the Techstream.

DEFINITION OF TERMS [05/2013 - ]

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CHECK FOR INTERMITTENT PROBLEMS [05/2013 - 01/2014]

HINT

Inspect the vehicle's ECM using check mode. Intermittent problems are easier to detect with the Techstream when the ECM is in check mode. In check mode, the ECM uses 1 trip detection logic, which is more sensitive to malfunctions than normal mode (default), which uses 2 trip detection logic.

1. Clear the DTCs. Refer to «DTC CHECK / CLEAR [05/2013 - 01/2014]»(ref-615120-S02653872462014050900000) .
2. Switch the ECM from normal mode to check mode using the Techstream. Refer to «CHECK MODE PROCEDURE [05/2013 - ]»(ref-615120-S02546400672014050900000) .
3. Perform a simulation test.
4. Check and wiggle the harness(es), connector(s) and terminal(s).

CHECK FOR INTERMITTENT PROBLEMS [01/2014 - ]

HINT

Inspect the vehicle's ECM using check mode. Intermittent problems are easier to detect with the Techstream when the ECM is in check mode. In check mode, the ECM uses 1 trip detection logic, which is more sensitive to malfunctions than normal mode (default), which uses 2 trip detection logic.

1. Clear the DTCs. Refer to «DTC CHECK / CLEAR [01/2014 - ]»(ref-615120-S08989089142014050900000) .
2. Switch the ECM from normal mode to check mode using the Techstream. Refer to «CHECK MODE PROCEDURE [05/2013 - ]»(ref-615120-S02546400672014050900000) .
3. Perform a simulation test.
4. Check and wiggle the harness(es), connector(s) and terminal(s).

REGISTRATION [05/2013 - ]

Note. The Vehicle Identification Number (VIN) must be input into a replacement ECM.

HINT

The VIN is a 17-digit alphanumeric vehicle identification number. The Techstream is required to register the VIN.

1. DESCRIPTION HINT: This registration Service Information consists of two parts: Read VIN and Write VIN. Read VIN: This process allows the VIN stored in the ECM to be read in order to confirm that the two VINs, the one provided with the vehicle and the one stored in the vehicle's ECM, are the same. Write VIN: This process allows the VIN to be input into the ECM. If the ECM is changed, or the ECM VIN and vehicle VIN do not match, the VIN can be registered or overwritten in the ECM by following this procedure.
2. READ VIN Confirm the vehicle VIN. Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Powertrain / Engine / Utility / VIN / VIN Read.
3. WRITE VIN Confirm the vehicle VIN. Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Powertrain / Engine / Utility / VIN / VIN Write.

Scheme 35

1. Inspection After Repair Perform learning value reset and idle learning after replacing or servicing parts related to engine operation. Details on procedures required are indicated by an asterisk and a number, and are explained in detail following the table. Part Replaced Engine Operation Learning Value Reset*1 Idle Learning*2 Throttle with motor body assembly*3 Cleaning the deposits from the throttle with motor body assembly*3 - o o Engine assembly - o o Cylinder head sub-assembly Camshaft (for intake or exhaust camshaft) Camshaft timing gear assembly Camshaft timing exhaust gear assembly Piston or piston ring Mass air flow meter sub-assembly Fuel injector assembly Fuel pump Air fuel ratio sensor Heated oxygen sensor Engine coolant temperature sensor Spark plug Ignition coil assembly Air leaks from intake system Gas leaks from exhaust system Confirm the following: Perform learning value reset and idle learning when one or more of the following conditions is met. A DTC was output before component replacement. An air fuel ratio learned value (one of A/F Learn Value Idle #1, A/F Learn Value Low #1, A/F Learn Value Mid1 #1, A/F Learn Value Mid2 #1, A/F Learn Value High #1) displayed in the Data List was higher than +/-15% before component replacement. Starting failure, rough idle, or engine stalls after component replacement. o o The items in the list above do not apply. - - Knock sensor*4 - - - o: Necessary. -: Unnecessary. NOTE: Engine learned values cannot be reset by disconnecting the battery negative (-) terminal or removing the EFI NO. 1 and ETCS fuses. *1: Learning Value Reset Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Enter the following menus: Powertrain / Engine / Utility / Learning Value Reset. Confirm the following conditions as instructed on the screen. - Ignition switch ON - Engine stopped - Battery voltage is higher than 9 V After confirming, select "Next" and initialize the learned value. HINT: If a message indicating learned value initialization failure is displayed on the screen, confirm the execution conditions, and perform learned value initialization again. After the completion of learned value initialization, confirm the air fuel ratio learned values (A/F Learn Value Idle #1, A/F Learn Value Low #1, A/F Learn Value Mid1 #1, A/F Learn Value Mid2 #1, A/F Learn Value High #1) in the Data List. Result If 0 is displayed for all the air fuel ratio learned values, initialization has completed correctly. If a value other than 0 is displayed for one of the air fuel ratio learned values, perform initialization again. After initialization, confirm the air fuel ratio learned values. If a value other than 0 is displayed, replace the ECM. *2: Idle Learning Turn the ignition switch off and wait for at least 30 seconds. Start the engine and warm it up until the engine coolant temperature is 80°C (176°F) or higher. HINT: Learning starts when the engine coolant temperature is 80°C (176°F) or higher. After the engine is warmed up, allow it to idle for 5 minutes with the air conditioning and all accessories off. Confirm that the idle speed is within the standard range. Standard Engine Idle Speed 600 to 700 rpm: Idling (for Manual Transaxle) 680 to 780 rpm: Idling (for Automatic Transaxle) HINT: Be sure to perform this step with all accessories off. Make sure that the shift lever is in P or N. *3: Perform memory reset and idle learning after replacing the throttle with motor body assembly or cleaning deposits from the throttle with motor body assembly. After that, check the idle speed. If the value is out of the specified range, perform the procedure below. WARNING: When performing the confirmation driving pattern, obey all speed limits and traffic laws. HINT: History information for driving and stopping is necessary to update idle learning. Warm up the engine (engine coolant temperature is 80°C (176°F) or higher, air conditioning and all accessories are off) [A]. Drive the vehicle at 10 km/h (6 mph) or more [B]. Idle the engine for 20 seconds or more [C]. Repeat procedure [B] and [C], and check that the idle speed is within the specified range [D]. Standard Engine Idle Speed 600 to 700 rpm: Idling (for Manual Transaxle) 680 to 780 rpm: Idling (for Automatic Transaxle) HINT: Be sure to perform this step with all accessories off. Make sure that the shift lever is in P or N. If the idle speed is still out of the specified range, repeat procedure [B] and [C] until the idle speed is within the specified range [E]. *4: Drive the vehicle for a short while after replacing the knock control sensor, and check if knocking occurs. If knocking occurs, drive the vehicle until knocking stops.

CHECKING MONITOR STATUS [05/2013 - 01/2014]

The purpose of the monitor result (mode 06) is to allow access to the results of on-board diagnostic monitoring tests of specific components/systems that are not continuously monitored. Examples are catalysts and evaporative emissions (EVAP) systems.

The monitor result allows the OBD II scan tool to display the monitor status, test value, minimum test limit and maximum test limit. These data are displayed after the vehicle has been driven to run the monitor.

When the test value is not between the minimum and maximum test limits, the ECM (PCM) interprets this as a malfunction. If the test value is on the borderline of the test limits, the component is likely to malfunction in the near future.

Perform the following procedures to view the monitor status. Although these procedures refer to the Lexus/Toyota Techstream, the monitor status can be checked using a generic OBD II scan tool. Refer to your scan tool operator's manual for specific procedural information.

1. PERFORM MONITOR DRIVE PATTERN Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Clear the DTCs. Refer to «DTC CHECK / CLEAR [05/2013 - 01/2014]»(ref-615120-S02653872462014050900000) . Operate the vehicle in accordance with the applicable driving pattern described in Readiness Monitor Drive Pattern. Refer to «READINESS MONITOR DRIVE PATTERN [05/2013 - 01/2014]»(ref-615120-S10458753212014050900000) . Do not turn the ignition switch off. HINT: The test results will be lost if the ignition switch is turned off.
2. ACCESS MONITOR RESULT Enter the following menus: Powertrain / Engine / Monitor / Current Monitor / Result. Confirm the monitor status for each component. HINT: The monitor status for each component is displayed in the Result column. Pass: The component is functioning normally. Fail: The component is malfunctioning. Display the test results and test value for a monitor by selecting the icon in the Details column for that monitor.
3. CHECK COMPONENT STATUS Compare the test value with the minimum test limit (Min Limit) and maximum test limit (Max Limit). If the test value is between the minimum and maximum test limits, the component is functioning normally. If not, the component is malfunctioning. The test value is usually not near the test limits. If the test value is on the borderline of the test limits, the component is likely to malfunction in the near future. HINT: The monitor result might on rare occasions be Pass even if the Malfunction Indicator Lamp (MIL) is illuminated. This indicates the system malfunctioned on a previous driving cycle. This might be caused by an intermittent problem.
4. MONITOR RESULT INFORMATION When using a generic scan tool, multiply the test value by the scaling value. For more details, refer to Monitor Result for each DTC.

CHECKING MONITOR STATUS [01/2014 - ]

The purpose of the monitor result (mode 06) is to allow access to the results of on-board diagnostic monitoring tests of specific components/systems that are not continuously monitored. Examples are catalysts and evaporative emissions (EVAP) systems.

The monitor result allows the OBD II scan tool to display the monitor status, test value, minimum test limit and maximum test limit. These data are displayed after the vehicle has been driven to run the monitor.

When the test value is not between the minimum and maximum test limits, the ECM (PCM) interprets this as a malfunction. If the test value is on the borderline of the test limits, the component is likely to malfunction in the near future.

Perform the following procedures to view the monitor status. Although these procedures refer to the Lexus/Toyota Techstream, the monitor status can be checked using a generic OBD II scan tool. Refer to your scan tool operator's manual for specific procedural information.

1. PERFORM MONITOR DRIVE PATTERN Connect the Techstream to the DLC3. Turn the ignition switch to ON. Turn the Techstream on. Clear the DTCs. Refer to «DTC CHECK / CLEAR [01/2014 - ]»(ref-615120-S08989089142014050900000) . Operate the vehicle in accordance with the applicable driving pattern described in Readiness Monitor Drive Pattern. Refer to «READINESS MONITOR DRIVE PATTERN [01/2014 - ]»(ref-615120-S00392391622014050900000) . Do not turn the ignition switch off. HINT: The test results will be lost if the ignition switch is turned off.
2. ACCESS MONITOR RESULT Enter the following menus: Powertrain / Engine / Monitor / Current Monitor / Result. Confirm the monitor status for each component. HINT: The monitor status for each component is displayed in the Result column. Pass: The component is functioning normally. Fail: The component is malfunctioning. Display the test results and test value for a monitor by selecting the icon in the Details column for that monitor.
3. CHECK COMPONENT STATUS Compare the test value with the minimum test limit (Min Limit) and maximum test limit (Max Limit). If the test value is between the minimum and maximum test limits, the component is functioning normally. If not, the component is malfunctioning. The test value is usually not near the test limits. If the test value is on the borderline of the test limits, the component is likely to malfunction in the near future. HINT: The monitor result might on rare occasions be Pass even if the Malfunction Indicator Lamp (MIL) is illuminated. This indicates the system malfunctioned on a previous driving cycle. This might be caused by an intermittent problem.
4. MONITOR RESULT INFORMATION When using a generic scan tool, multiply the test value by the scaling value. For more details, refer to Monitor Result for each DTC.

READINESS MONITOR DRIVE PATTERN [05/2013 - 01/2014]

1. PURPOSE OF READINESS TESTS The On-Board Diagnostic (OBD II) system is designed to monitor the performance of emissions-related components and indicate any detected abnormalities using DTCs (Diagnostic Trouble Codes). Since various components need to be monitored during different driving conditions, the OBD II system is designed to run separate monitoring programs called Readiness Monitors. To view the monitor status, enter the following menus: Powertrain / Engine / Monitor / Current Monitor / Current. When the Readiness Monitor status reads "complete", the necessary conditions have been met for running the performance tests for that Readiness Monitor. A generic OBD II scan tool can also be used to view the Readiness Monitor status. HINT: Many state Inspection and Maintenance (I/M) programs require a vehicle's Readiness Monitor status to show "complete" before beginning emissions tests. The Readiness Monitor will be reset to "incomplete" if: The ECM has lost battery power or blown a fuse. DTCs have been cleared. If the Readiness Monitor status shows "incomplete", follow the appropriate Readiness Monitor Drive Pattern to change the status to "complete". WARNING: Strictly observe posted speed limits, traffic laws, and pay attention to road conditions when performing these driving patterns. NOTE: These driving patterns represent the fastest method of satisfying all conditions necessary to achieve "complete" status for each specific Readiness Monitor. In the event of a driving pattern being interrupted (possibly due to factors such as traffic conditions), the driving pattern can be resumed. In most cases, the Readiness Monitor will still achieve "complete" status upon completion of the driving pattern. To ensure completion of the Readiness Monitors, avoid sudden changes in vehicle load and speed (driving up and down hills and/or sudden acceleration).
2. CATALYST MONITOR (ACTIVE AIR-FUEL RATIO CONTROL TYPE) Refer to Confirmation Driving Pattern [P0420]. Refer to «CONFIRMATION DRIVING PATTERN»(ref-615236-S35909805322014050900000) .
3. VVT SYSTEM MONITOR Refer to Confirmation Driving Pattern [P0011]. Refer to «CONFIRMATION DRIVING PATTERN»(ref-615237-S21590996152014050900000) . Refer to Confirmation Driving Pattern [P0014]. Refer to «CONFIRMATION DRIVING PATTERN»(ref-615237-S18742610902014050900000) .
4. EVAP SYSTEM MONITOR (KEY OFF TYPE) Refer to Confirmation Driving Pattern [EVAP System]. Refer to «CONFIRMATION DRIVING PATTERN»(ref-615235-S18652279422014050900000) .
5. AIR-FUEL RATIO (A/F) AND HEATED OXYGEN (HO2) SENSOR MONITORS (ACTIVE AIR-FUEL RATIO CONTROL TYPE) Refer to Confirmation Driving Pattern [P0136]. Refer to «CONFIRMATION DRIVING PATTERN»(ref-615236-S41940002442014050900000) . Refer to Confirmation Driving Pattern [P014C]. Refer to «CONFIRMATION DRIVING PATTERN»(ref-615236-S19855647062014050900000) . Refer to Confirmation Driving Pattern [P2195]. Refer to «CONFIRMATION DRIVING PATTERN»(ref-615238-S35073905732014050900000) .
6. AIR-FUEL RATIO (A/F) AND HEATED OXYGEN (HO2) SENSOR HEATER MONITORS (FRONT A/F AND REAR HO2 SENSOR TYPE) Refer to Confirmation Driving Pattern [P0031]. Refer to «CONFIRMATION DRIVING PATTERN»(ref-615237-S29241104322014050900000) . Refer to Confirmation Driving Pattern [P0037]. Refer to «CONFIRMATION DRIVING PATTERN»(ref-615237-S22445440282014050900000) .
7. AIR FUEL RATIO (A/F) IMBALANCE MONITOR Refer to Confirmation Driving Pattern [P219A]. Refer to «CONFIRMATION DRIVING PATTERN»(ref-615238-S07634606452014050900000) .

READINESS MONITOR DRIVE PATTERN [01/2014 - ]

1. PURPOSE OF READINESS TESTS The On-Board Diagnostic (OBD II) system is designed to monitor the performance of emissions-related components and indicate any detected abnormalities using DTCs (Diagnostic Trouble Codes). Since various components need to be monitored during different driving conditions, the OBD II system is designed to run separate monitoring programs called Readiness Monitors. To view the monitor status, enter the following menus: Powertrain / Engine / Monitor / Current Monitor / Current. When the Readiness Monitor status reads "complete", the necessary conditions have been met for running the performance tests for that Readiness Monitor. A generic OBD II scan tool can also be used to view the Readiness Monitor status. HINT: Many state Inspection and Maintenance (I/M) programs require a vehicle's Readiness Monitor status to show "complete" before beginning emissions tests. The Readiness Monitor will be reset to "incomplete" if: The ECM has lost battery power or blown a fuse. DTCs have been cleared. If the Readiness Monitor status shows "incomplete", follow the appropriate Readiness Monitor Drive Pattern to change the status to "complete". WARNING: Strictly observe posted speed limits, traffic laws, and pay attention to road conditions when performing these driving patterns. NOTE: These driving patterns represent the fastest method of satisfying all conditions necessary to achieve "complete" status for each specific Readiness Monitor. In the event of a driving pattern being interrupted (possibly due to factors such as traffic conditions), the driving pattern can be resumed. In most cases, the Readiness Monitor will still achieve "complete" status upon completion of the driving pattern. To ensure completion of the Readiness Monitors, avoid sudden changes in vehicle load and speed (driving up and down hills and/or sudden acceleration).
2. CATALYST MONITOR (ACTIVE AIR-FUEL RATIO CONTROL TYPE) Refer to Confirmation Driving Pattern [P0420]. Refer to «CONFIRMATION DRIVING PATTERN»(ref-615239-S24124402312014050900000) .
3. VVT SYSTEM MONITOR Refer to Confirmation Driving Pattern [P0011]. Refer to «CONFIRMATION DRIVING PATTERN»(ref-615237-S20144188442014050900000) . Refer to Confirmation Driving Pattern [P0014]. Refer to «CONFIRMATION DRIVING PATTERN»(ref-615237-S03964409212014050900000) .
4. EVAP SYSTEM MONITOR (KEY OFF TYPE) Refer to Confirmation Driving Pattern [EVAP System]. Refer to «CONFIRMATION DRIVING PATTERN»(ref-615235-S29609134562014050900000) .
5. AIR-FUEL RATIO (A/F) AND HEATED OXYGEN (HO2) SENSOR MONITORS (ACTIVE AIR-FUEL RATIO CONTROL TYPE) Refer to Confirmation Driving Pattern [P0136]. Refer to «CONFIRMATION DRIVING PATTERN»(ref-615236-S32453585612014050900000) . Refer to Confirmation Driving Pattern [P014C]. Refer to «CONFIRMATION DRIVING PATTERN»(ref-615236-S28159323272014050900000) . Refer to Confirmation Driving Pattern [P2195]. Refer to «CONFIRMATION DRIVING PATTERN»(ref-615238-S22797473082014050900000) .
6. AIR-FUEL RATIO (A/F) AND HEATED OXYGEN (HO2) SENSOR HEATER MONITORS (FRONT A/F AND REAR HO2 SENSOR TYPE) Refer to Confirmation Driving Pattern [P0031]. Refer to «CONFIRMATION DRIVING PATTERN»(ref-615237-S36846194822014050900000) . Refer to Confirmation Driving Pattern [P0037]. Refer to «CONFIRMATION DRIVING PATTERN»(ref-615237-S04146643452014050900000) .
7. AIR FUEL RATIO (A/F) IMBALANCE MONITOR Refer to Confirmation Driving Pattern [P219A]. Refer to «CONFIRMATION DRIVING PATTERN»(ref-615238-S31833564512014050900000) .

FREEZE FRAME DATA [01/2014 - ]

1. DESCRIPTION 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 recorded at the time of a malfunction. Freeze frame data records the engine conditions (fuel system information, calculated load, engine coolant temperature, fuel trim, engine speed, vehicle speed, etc.) when a malfunction is detected. HINT: If it is impossible to duplicate the problem even though a DTC is output, check the freeze frame data. The ECM records engine conditions in the form of freeze frame data every 0.5 seconds. Using the Techstream, 5 separate sets of freeze frame data can be checked. 3 data sets from before the DTC was stored 1 data set from when the DTC was stored 1 data set from after the DTC was stored These data sets can be used to simulate the condition of the vehicle from around the time of the occurrence of the malfunction. The data may assist in identifying the cause of the malfunction, and in judging whether it was temporary or not.
2. PENDING FREEZE FRAME DATA HINT: Pending freeze frame data is stored when a 2 trip DTC is first detected during the first trip. 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. Select a DTC in order to display its pending freeze frame data. HINT: Pending freeze frame data is cleared when any of the following occurs. Using the Techstream, the DTCs cleared. The cable is disconnected from the negative (-) battery terminal. 40 trips with the engine fully warmed up have been performed after returning to normal. (Pending freeze frame data will not be cleared by only returning the system to normal.) With previous pending freeze frame data stored, if pending freeze frame data is newly stored when a 2 trip DTC is detected in the first trip, the old freeze frame data will be replaced with the new data of the newly detected DTC in the next trip.
3. LIST OF FREEZE FRAME DATA Refer to "Data List / Active Test". Refer to «DATA LIST / ACTIVE TEST [01/2014 - ]»(ref-615234-S30683406662014050900000) .

CHECK MODE PROCEDURE [05/2013 - ]

HINT

Compared to normal mode, check mode is more sensitive to malfunctions. Therefore, check mode can detect malfunctions that may not be detected in normal mode.

Note. All the stored DTCs and freeze frame data are cleared if: 1) the ECM is changed from normal mode to check mode or vice versa; or 2) the ignition switch is turned from ON to ACC or off while in check mode. Before changing modes, always check and note any DTCs and freeze frame data.

Scheme 36

1. CHECK MODE PROCEDURE Check that the following conditions are met: Battery positive voltage 11 V or higher. Throttle valve fully closed. Shift lever in P or N. A/C switch 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 / Utility / Check Mode. Switch the ECM from normal mode to check mode. Make sure the MIL flashes as shown in the illustration. Start the engine. Make sure the MIL turns off. Simulate the conditions of the malfunction described by the customer. Check DTCs and freeze frame data using the Techstream.

FAIL-SAFE CHART [05/2013 - ]

If any of the following DTCs are stored, the ECM enters fail-safe mode to allow the vehicle to be driven temporarily.

HINT

1. *1: The vehicle can be driven slowly when the accelerator pedal is depressed firmly and slowly. If the accelerator pedal is depressed quickly, the vehicle may speed up and slow down erratically.
2. *2: Misfire related fail-safe operations occur when catalyst overheat malfunctions occur.