PRECAUTION
- INITIALIZATION NOTE: When disconnecting the negative (-) battery cable, initialize the following systems after the cable is reconnected. System Name See procedure Power Back Door System Refer to «INITIALIZATION»(ref-422289-S16028026952011092600000) Perform RESET MEMORY (AT initialization) when replacing the automatic transaxle assembly, engine assembly or ECM (U151E, refer to «INITIALIZATION»(ref-422296-S17226167862011092600000) , U151F, refer to «INITIALIZATION»(ref-422297-S21564875322011092600000) ). Perform REGISTRATION (VIN registration) when replacing the ECM, refer to «REGISTRATION»(ref-422300-S30318423972011092600000) . HINT: Initialization cannot be completed by only removing the battery.
- FOR USING TECHSTREAM WARNING: Observe the following items for safety reasons: Before using the tester, read the instruction manual. Prevent the tester cable from being caught on the pedals, shift lever and steering wheel when driving with the tester connected to the vehicle. When driving the vehicle for testing purposes using the tester, two persons are required. One is for driving the vehicle, and the other operates the tester.
- FOR USING BATTERY DURING INSPECTION While using the battery during inspection, do not bring the positive and negative tester probes too close to each other as a short circuit may occur.
- EXPRESSION OF IGNITION SWITCH HINT: 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 Switch Type Ignition Switch (Position) Engine Switch (Condition) Ignition switch off LOCK Off Ignition switch on (IG) ON On (IG) Ignition switch on (ACC) ACC On (ACC) Engine Start START Start
- COOLING FAN SYSTEM WARNING: When the ignition switch is turned off and the engine temperature is high, the cooling fans may operate for approximately 3 minutes. After turning the ignition switch off, keep hands and objects away from the fans when they are operating. HINT: If all of the following are met for a certain period of time during a few minute period immediately before the engine is stopped, the electric fans will continue to operate for 3 minutes after the engine is stopped. This is performed to ensure restartability and stabilize idle speed. Techstream indicates a very high coolant temperature. Techstream indicates a high outside air temperature. The vehicle has been driven under high load (driving on an uphill or equivalent). The following sensors are used for this control: Coolant temperature sensor Outside air temperature sensor Mass air flow meter Vehicle speed sensors
DEFINITION OF TERMS
| Terms | Definitions |
|---|---|
| Monitor Description | Description of what ECM monitors and how to detect malfunctions (monitoring purpose and details). |
| Related DTCs | A group of diagnostic trouble codes that are output by ECM based on the same malfunction detection logic. |
| Typical Enabling Conditions | Preconditions that allow ECM to detect malfunction. With all preconditions satisfied, ECM sets DTC when monitored value(s) exceeds malfunction threshold(s). |
| Sequence of Operation | Order of monitor priority, applied if multiple sensors and components are involved in single malfunction detection process. Each sensor and component monitored in turn and not monitored until previous detection operation is completed. |
| Required Sensors / Components | Sensors and components used by ECM to detect each malfunction. |
| Frequency of Operation | Number of times ECM checks for each malfunction during each driving cycle. "Once per driving cycle" means ECM performs checks for that malfunction only once in single driving cycle. "Continuous" means ECM performs checks for that malfunction whenever enabling conditions are met. |
| Duration | Minimum time for which ECM must detect continuous deviation in monitored value(s) in order to set DTC. Timing begins when typical enabling conditions are met. |
| Malfunction Thresholds | Values, beyond which, ECM determines malfunctions exist and sets DTCs. |
| MIL Operation | Timing of MIL illumination after defect is detected. "Immediate" means ECM illuminates MIL as soon as malfunction is detected. "2 driving cycles" means ECM illuminates MIL if the same malfunction is detected twice during the next sequential driving cycle. |
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CHECK FOR INTERMITTENT PROBLEMS
- CHECK FOR INTERMITTENT PROBLEMS HINT: For use of the Techstream only: 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. Clear the DTCs, refer to «DTC CHECK / CLEAR»(ref-422300-S24344107222011092600000) . Switch the ECM from normal mode to check mode using the Techstream, refer to «CHECK MODE PROCEDURE»(ref-422300-S23062665192011092600000) . Perform a simulation test, refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-422289-S34804177702011092600000) . Check the connector(s) and terminal(s), refer to «ELECTRONIC CIRCUIT INSPECTION PROCEDURE»(ref-422289-S37007492172011092600000) . Check and wiggle the harness(es), connector(s) and terminal(s), refer to «ELECTRONIC CIRCUIT INSPECTION PROCEDURE»(ref-422289-S37007492172011092600000) .
REGISTRATION
Note. The Vehicle Identification Number (VIN) must be input into the replacement ECM.
HINT
The VIN is a 17-digit alphanumeric vehicle identification number. The Techstream is required to register the VIN.
- DESCRIPTION HINT: This registration section consists of two parts: Read VIN and Write VIN. Read VIN: Explains the VIN reading process in a flowchart. This process allows the VIN stored in the ECM to be read in order to confirm that the two VINs, provided with the vehicle and stored in the vehicle's ECM, are the same. Write VIN: Explains the VIN writing process in a flowchart. 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.
- READ VIN Confirm the vehicle VIN. Connect the Techstream to the DLC3. Turn the ignition switch on (IG). Turn the tester on. Select the following menu items: Powertrain / Engine and ECT / Utility / VIN / VIN Read.
- WRITE VIN Confirm the vehicle VIN. Connect the Techstream to the DLC3. Turn the ignition switch on (IG). Turn the tester on. Select the following menu items: Powertrain / Engine and ECT / Utility / VIN / VIN Write.
CHECKING MONITOR STATUS
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.
- PERFORM MONITOR DRIVE PATTERN Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Clear the DTCs, refer to «DTC CHECK / CLEAR»(ref-422300-S24344107222011092600000) . Operate the vehicle in accordance with the applicable drive pattern described in Readiness Monitor Drive Pattern, refer to «READINESS MONITOR DRIVE PATTERN»(ref-422300-S33364211702011092600000) . Do not turn the engine switch off. HINT: The test results will be lost if the engine switch is turned off.
- ACCESS MONITOR RESULT Enter the following menus: Powertrain / Engine and ECT / 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 for a monitor by selecting the icon in the Details column for that monitor. Display the test value for an item listed under Test Results by selecting the icon in the Details column for that item.
- 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.
- MONITOR RESULT INFORMATION When using a generic scan tool, multiply the test value by the scaling value listed below. Advance / Retarded Intake Side BANK 1 Monitor ID Test ID Scaling Unit Description $35 $81 Multiply by 0.01 Second Forced movement of oil control valve time Advance / Retarded Intake Side BANK 2 Monitor ID Test ID Scaling Unit Description $36 $81 Multiply by 0.01 Second Forced movement of oil control valve time Advance / Retarded Exhaust Side BANK 1 Monitor ID Test ID Scaling Unit Description $35 $85 Multiply by 0.01 Second Forced movement of oil control valve time Advance / Retarded Exhaust Side BANK 2 Monitor ID Test ID Scaling Unit Description $36 $85 Multiply by 0.01 Second Forced movement of oil control valve time AIR FUEL RATIO SENSOR BANK 1 Monitor ID Test ID Scaling Unit Description $01 $8E Multiply by 0.0003 No dimension A/F sensor deterioration level $01 $8A Multiply by 0.00012 V Rich to Lean response rate deterioration level $01 $8A Multiply by 0.00012 V Lean to Rich response rate deterioration level $01 $90 Multiply by 0.001 Second Rich to Lean delay level $01 $90 Multiply by 0.001 Second Lean to Rich delay level $01 $91 Multiply by 0.004 mA A/F sensor current HEATED OXYGEN SENSOR BANK 1 SENSOR 2 Monitor ID Test ID Scaling Unit Description $02 $08 Multiply by 0.001 V Maximum sensor voltage $02 $8B Multiply by 0.001 Seconds 0.35 - 0.2 V sensor switch time $02 $8F Multiply by 0.003 g Maximum oxygen storage capacity $02 $8D Multiply by 0.001 Seconds Duration that sensor voltage drops to 0.2 V during fuel-cut AIR FUEL RATIO SENSOR BANK 2 Monitor ID Test ID Scaling Unit Description $05 $8E Multiply by 0.0003 No dimension A/F sensor deterioration level $05 $8A Multiply by 0.00012 V Rich to Lean response rate deterioration level $05 $8A Multiply by 0.00012 V Lean to Rich response rate deterioration level $05 $90 Multiply by 0.001 Second Rich to Lean delay level $05 $90 Multiply by 0.001 Second Lean to Rich delay level $05 $91 Multiply by 0.004 mA A/F sensor current HEATED OXYGEN SENSOR BANK 2 SENSOR 2 Monitor ID Test ID Scaling Unit Description $06 $08 Multiply by 0.001 V Maximum sensor voltage $06 $8B Multiply by 0.001 Seconds 0.35 - 0.2 V sensor switch time $06 $8F Multiply by 0.003 g Maximum oxygen storage capacity $06 $8D Multiply by 0.001 Seconds Duration that sensor voltage drops to 0.2 V during fuel-cut CATALYST-BANK 1 Monitor ID Test ID Scaling Unit Description $21 $A9 Multiply by 0.0003 No dimension Oxygen storage capacity of catalyst-bank 1 CATALYST-BANK 2 Monitor ID Test ID Scaling Unit Description $22 $A9 Multiply by 0.0003 No dimension Oxygen storage capacity of catalyst-bank 2 EVAP Monitor ID Test ID Scaling Unit Description $3D $C9 Multiply by 0.001 kPa Test value for small leak (P0456) $3D $CA Multiply by 0.001 kPa Test value for gross leak (P0455) $3D $CB Multiply by 0.001 kPa Test value for leak detection pump OFF stuck (P2401) $3D $CD Multiply by 0.001 kPa Test value for leak detection pump ON stuck (P2402) $3D $CE Multiply by 0.001 kPa Test value for vent valve OFF stuck (P2420) $3D $CF Multiply by 0.001 kPa Test value for vent valve ON stuck (P2419) $3D $D0 Multiply by 0.001 kPa Test value for reference orifice low flow (P043E) $3D $D1 Multiply by 0.001 kPa Test value for reference orifice high flow (P043F) $3D $D4 Multiply by 0.001 kPa Test value for purge VSV close stuck (P0441) $3D $D5 Multiply by 0.001 kPa Test value for purge VSV open stuck (P0441) $3D $D7 Multiply by 0.001 kPa Test value for purge flow insufficient (P0441) MISFIRE Monitor ID Test ID Scaling Unit Description $A1 $0B Multiply by 1 Time Total EWMA misfire count of all cylinders in last ten driving cycles EWMA: Exponential Weighted Moving Average $A1 $0C Multiply by 1 Time When ignition switch is ON, total misfire count of all cylinders in last driving cycle is displayed. While engine is running, total misfire count of all cylinders in current driving cycle is displayed. $A2 $0B Multiply by 1 Time Total EWMA misfire count of cylinder 1 in last ten driving cycles $A2 $0C Multiply by 1 Time When ignition switch is ON, total misfire count of cylinder 1 in last driving cycle is displayed. While engine is running, total misfire count of cylinder 1 in current driving cycle is displayed. $A3 $0B Multiply by 1 Time Total EWMA misfire count of cylinder 2 in last ten driving cycles $A3 $0C Multiply by 1 Time When ignition switch is ON, total misfire count of cylinder 2 in last driving cycle is displayed. While engine is running, total misfire count of cylinder 2 in current driving cycle is displayed. $A4 $0B Multiply by 1 Time Total EWMA misfire count of cylinder 3 in last ten driving cycles $A4 $0C Multiply by 1 Time When ignition switch is ON, total misfire count of cylinder 3 in last driving cycle is displayed. While engine is running, total misfire count of cylinder 3 in current driving cycle is displayed. $A5 $0B Multiply by 1 Time Total EWMA misfire count of cylinder 4 in last ten driving cycles $A5 $0C Multiply by 1 Time When ignition switch is ON, total misfire count of cylinder 4 in last driving cycle is displayed. While engine is running, total misfire count of cylinder 4 in current driving cycle is displayed. $A6 $0B Multiply by 1 Time Total EWMA misfire count of cylinder 5 in last ten driving cycles $A6 $0C Multiply by 1 Time When ignition switch is ON, total misfire count of cylinder 5 in last driving cycle is displayed. While engine is running, total misfire count of cylinder 5 in current driving cycle is displayed. $A7 $0B Multiply by 1 Time Total EWMA misfire count of cylinder 6 in last ten driving cycles $A7 $0C Multiply by 1 Time When ignition switch is ON, total misfire count of cylinder 6 in last driving cycle is displayed. While engine is running, total misfire count of cylinder 6 in current driving cycle is displayed.
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- PURPOSE OF READINESS TESTS The On-Board Diagnostic (OBD II) system is designed to monitor the performance of emission-related components, and indicate any detected abnormalities with DTCs (Diagnostic Trouble Codes). Since various components need to be monitored in different driving conditions, the OBD II system is designed to run separate monitoring programs called Readiness Monitors. To view the status, select the following menu items: Powertrain / Engine and ECT / Monitor / Status2. 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 Inspection and Maintenance (I/M) programs require a vehicle's Readiness Monitor status to show Complete before beginning emission tests. The Readiness Monitor will be reset to Incomplete if: The ECM has lost battery power or broken a fuse. DTCs have been cleared. The conditions for running the Readiness Monitor have not been met. 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 road conditions when performing these drive patterns. NOTE: These drive patterns represent the fastest method of satisfying all conditions necessary to achieve complete status for each specific Readiness Monitor. In the event of a drive pattern being interrupted (possibly due to factors such as traffic conditions), the drive pattern can be resumed. In most cases, the Readiness Monitor will still achieve complete status upon completion of the drive 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). CONTENTS: Steps Section Titles 1 Catalyst Monitor (Active Air Fuel Ratio Control Type) 2 EVAP System Monitor (Key-Off Type) 3 Air Fuel Ratio and Heated Oxygen Sensor Monitors (Active Air Fuel Ratio Control Type) 4 Air Fuel Ratio and Heated Oxygen Sensor Heater Monitors (Front Air Fuel Ratio and Rear Heated Oxygen Sensor Type)
- CATALYST MONITOR (ACTIVE AIR-FUEL RATIO CONTROL TYPE) Preconditions The monitor will not run unless: The MIL is OFF. Drive Pattern Connect the Techstream to the DLC3. Turn the ignition switch on (IG). Turn the tester or scan tool ON. Clear the DTCs. Start the engine and warm it up. Drive the vehicle at between 40 mph and 70 mph (64 km/h and 113 km/h) for at least 10 minutes. Monitor Status Check the Readiness Monitor status displayed on the tester. If the status does not switch to Complete, extend the driving time.
- EVAP MONITOR (KEY-OFF TYPE) Preconditions The monitor will not run unless: The fuel tank is less than 90% full. The altitude is less than 8000 ft. (2450 m). The vehicle is stationary. The engine coolant temperature is between 4.4°C and 35°C (40°F and 95°F). The intake air temperature is between 4.4°C and 35°C (40°F and 95°F). Vehicle was driven in the city area (or on free-way) for 10 minutes or more. Monitor Conditions Turn the ignition switch off and wait for 5 hours. HINT: Do not start the engine until checking Readiness Monitor status. If the engine is started, the step described above must be repeated. Monitor Status Connect the Techstream to the DLC3. Turn the ignition switch on (IG). Turn the tester or scan tool ON. Check the Readiness Monitor status displayed on the tester or scan tool. If the status does not switch to Complete, restart the engine, make sure that the preconditions have been met, and then perform the Monitor Conditions again.
- AIR FUEL RATIO SENSOR AND HEATED OXYGEN SENSOR MONITORS Preconditions The monitor will not run unless: 2 minutes or more have elapsed since the engine was started. The engine coolant temperature is 75°C (167°F) or more. Cumulative driving time at a vehicle speed of 30 mph (48 km/h) or more exceeds 6 minutes. Air fuel ratio feedback control is performed. Fuel-cut control is performed for 8 seconds or more (for the Rear Heated Oxygen Sensor Monitor). Drive Pattern for front air fuel ratio sensor and heated oxygen sensor. Connect the Techstream to the DLC3. Turn the ignition switch on (IG). Turn the tester on. Clear the DTCs. Start the engine, and warm it up until the engine coolant temperature reaches 75°C (167°F) or higher. Drive the vehicle at 38 mph and 75 mph (61 km/h and 120 km/h) for at least 10 minutes. Change the transmission to the 2nd gear. Accelerate the vehicle to 40 mph (64 km/h) or more by depressing the accelerator pedal for at least 10 seconds (Procedure "A"). Soon after performing procedure "A" above, release the accelerator pedal for at least 10 seconds without depressing the brake pedal, in order to execute fuel-cut control (Procedure "B"). Allow the vehicle to decelerate until the vehicle speed declines to less than 6 mph (10 km/h) (Procedure "C"). Repeat procedures from "A" through "C" above at least 3 times in one driving cycle. Monitor Status Check the Readiness Monitor status displayed on the tester. If the status does not switch to Complete, make sure that the preconditions have been met and then perform the Drive Pattern again.
- AIR FUEL RATIO AND HEATED OXYGEN SENSOR HEATER MONITORS (FRONT AIR FUEL RATIO AND REAR HEATED OXYGEN SENSOR TYPE) Preconditions The monitor will not run unless: The MIL is OFF. Drive Pattern Connect the Techstream to the DLC3. Turn the ignition switch on (IG). Clear the DTCs. Start the engine. Allow the engine to idle for 10 minutes or more. Drive the vehicle at 25 mph (40 km/h) or more for at least 2 minutes. Monitor Status Check the Readiness Monitor status displayed on the tester or scan tool. If the status does not switch to Complete, make sure that the preconditions have been met, and repeat the Drive Pattern.
CHECK MODE PROCEDURE
HINT
Techstream
Compared to normal mode, check mode is more sensitive to malfunctions. Therefore, check mode can detect the malfunctions that cannot be detected by normal mode.
Note. All the stored DTCs and freeze frame data are erased if: 1) the ECM is changed from normal mode to check mode or vice versa; or 2) the ignition switch is turned off or turned on (ACC) from on (IG) while in check mode. Before changing modes, always check and make a note of any DTCs and freeze frame data.
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- CHECK MODE PROCEDURE Check and ensure the following conditions: Battery voltage 12 V or more Throttle valve fully closed The shift lever in the P or N position A/C switched OFF Turn the ignition switch off. Connect the Techstream to the DLC3. Turn the ignition switch on (IG). Turn the tester on. Select the following menu items: Powertrain / Engine and ECT / Utility / Check Mode. Switch the ECM from normal mode to check mode. Make sure that the MIL flashes as shown in the illustration. Start the engine. Make sure that the MIL goes off. Simulate the conditions of the malfunction described by the customer. Check for DTCs and freeze frame data using the tester.
FAIL-SAFE CHART
If any of the following DTCs are set, the ECM enters fail-safe mode to allow the vehicle to be driven temporarily.
| DTCs | Components | Fail-Safe Operations | Fail-Safe Deactivation Conditions |
|---|---|---|---|
| P0031, P0032, P0051 and P0052 | Air fuel ratio sensor heater | ECM turns off air fuel ratio sensor heater | Ignition switch off |
| P0037, P0038, P0057 and P0058 | Heated oxygen sensor heater | ECM turns off heated oxygen sensor heater | Ignition switch off |
| P0102 and P0103 | Mass air flow meter | ECM calculates ignition timing according to engine speed and throttle valve position | Pass condition detected |
| P0112 and P0113 | Intake air temperature sensor | ECM estimates Intake air temperature to be 20°C (68°F) | Pass condition detected |
| P0115, P0117 and P0118 | Engine coolant temperature sensor | ECM estimates engine coolant temperature sensor to be 80°C (176°F) | Pass condition detected |
| P0120, P0121, P0122, P0123, P0220, P0222, P0223, P0604, P0606, P0607, P0657, P2102, P2103, P2111, P2112, P2118, P2119 and P2135 | Electronic throttle control system | ECM cuts off throttle actuator current and throttle valve returned to 6° throttle position by return spring ECM then adjusts engine output by controlling fuel injection (intermittent fuel-cut) and ignition timing in accordance with accelerator pedal opening angle, to allow vehicle to continue at minimal speed*1 | Pass condition detected and then ignition switch turned off |
| P0300, P0301, P0302, P0303, P0304, P0305 and P0306*2 | Fuel injector Electronic throttle control system | When misfire occurs, fuel cut is performed for catalyst overheat malfunction prevention During normal load and normal engine speed (MIL is blinking) - Fuel cut is performed on malfunctioning cylinder During high load and high engine speed (MIL is blinking) - Throttle valve opening angle control is performed - All cylinder fuel cut or malfunction cylinder fuel cut | Pass condition detected and then ignition switch turned off |
| P0327, P0328, P0332 and P0333 | Knock Sensor | ECM sets ignition timing to maximum retard | Ignition switch off |
| P0351 to P0356 | Igniter | ECM cuts fuel | Pass condition detected |
| P2120, P2121, P2122, P2123, P2125, P2127, P2128 and P2138 | Accelerator pedal position sensor | Accelerator pedal position sensor has 2 sensor circuits: Main and Sub If either of circuits malfunctions, ECM controls engine using the other circuit If both of circuits malfunction, ECM regards accelerator pedal as being released. As a result, throttle valve is closed and engine idles | Pass condition detected and then ignition switch turned off |
HINT
- *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: Misfire related fail-safe operations occur when catalyst overheat malfunctions occur.