DEFINITION OF TERMS
| Term | Definition |
|---|---|
| Monitor Description | Description of what the ECM monitors and how it detects malfunctions (monitoring purpose and its details). |
| Related DTCs | A group of diagnostic trouble codes that are output by the ECM based on the same malfunction detection logic. |
| Typical Enabling Condition | Preconditions that allow the ECM to detect malfunctions. With all preconditions satisfied, the ECM sets DTCs when monitored value(s) exceeds malfunction threshold(s). |
| Sequence of Operation | Order of monitor priority, applied if multiple sensors and components are involved in a single malfunction detection process. Each sensor and component is monitored in turn, when previous detection operation has completed. |
| Required Sensor/Components | The sensors and components used by the ECM to detect each malfunction. |
| Frequency of Operation | The number of times the ECM checks for each malfunction during each driving cycle. "Once per driving cycle" means ECM only performs checks for that malfunction once during a single driving cycle. "Continuous" means the ECM performs checks for that malfunction whenever enabling conditions are met. |
| Duration | Minimum time for which the ECM must detect a continuous deviation in monitored value(s) in order to set a DTC. Timing begins when Typical Enabling Conditions met. |
| Malfunction Thresholds | The value beyond which the ECM determines malfunctions exist and sets DTCs. |
| MIL Operation | Timing of MIL illumination after a malfunction is detected. "Immediate" means the ECM illuminates the MIL as soon as a malfunction is detected. "2 driving cycle" means the ECM illuminates the MIL if the same malfunction is detected a second time during the next sequential driving cycle. |
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CHECK FOR INTERMITTENT PROBLEMS
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.
- Clear DTCs. Refer to «DTC CHECK / CLEAR»(ref-393183-S13119469612011040700000) .
- Switch the ECM from normal mode to check mode using the Techstream. Refer to «CHECK MODE PROCEDURE»(ref-393183-S00736522582011040700000) .
- Perform a simulation test. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-393046-S05278016202011040700000) .
- Check and wiggle the harness(es), connector(s) and terminal(s). Refer to «ELECTRONIC CIRCUIT INSPECTION PROCEDURE»(ref-393046-S13650685622011040700000) .
CHECKING MONITOR STATUS
The purpose of the monitor result (mode 06) is to allow access to the results for on-board diagnostic monitoring tests of specific components/systems that are not continuously monitored. Examples are the catalyst, evaporative emission (EVAP) and thermostat.
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 test limit and maximum test limit, the ECM (PCM) interprets this as a malfunction. When the component is not malfunctioning, if the difference of the test value and test limit is very small, the component will malfunction in the near future.
Perform the following instruction to view the monitor status. Although these instruction reference the Toyota diagnostic tester, it can be checked using a generic OBD II scan tool. Refer to your scan tool operator's manual for specific procedures.
- PERFORM MONITOR DRIVE PATTERN Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Clear DTCs. Refer to «DTC CHECK / CLEAR»(ref-393183-S13119469612011040700000) . Run the vehicle in accordance with the applicable drive pattern described in Readiness Monitor Drive Pattern. Refer to «READINESS MONITOR DRIVE PATTERN»(ref-393183-S34545196722011040700000) . Do not turn the power switch off. NOTE: The test results will be lost if the power switch is turned off.
- ACCESS MONITOR RESULT Enter the following menus: Powertrain / Engine and ECT / Monitor / Result. The monitor status appears after the component name. Pass: The component is functioning normally. Fail: The component is malfunctioning. Confirm that the component is either Pass or Fail. Select the component and press ENTER. The accuracy test value appears if the monitor status is either Pass or Fail.
- 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 test limit and maximum test limit, the component is functioning normally. If not, the component is malfunctioning. The test value is usually significantly higher or lower than the test limit. If the test value is on the borderline of the test limit, the component will 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 If you use a generic scan tool, multiply the value by the scaling value listed below. ADVANCE INTAKE SIDE Monitor ID Test ID Scaling Unit Description $35 $81 Multiply by 0.01 Second Forced movement of oil control valve time EXHAUST GAS RECIRCULATION SYSTEM Monitor ID Test ID Scaling Unit Description $31 $BD Multiply by 0.01 kPa Delta Manifold Absolute Pressure AIR FUEL RATIO SENSOR (SENSOR 1) Monitor ID Test ID Scaling Unit Description $01 $8E Multiply by 0.001 V Air fuel ratio sensor deterioration level $01 $91 Multiply by 0.004 mA Air fuel ratio sensor current HEATED OXYGEN SENSOR (SENSOR 2) Monitor ID Test ID Scaling Unit Description $02 $07 Multiply by 0.001 V Minimum sensor voltage $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 $8D Multiply by 0.001 Seconds Duration that sensor voltage drops to 0.2 V during fuel-cut $02 $8F Multiply by 0.0003 g Maximum oxygen storage capacity CATALYST Monitor ID Test ID Scaling Unit Description $21 $A9 Multiply by 0.0003 No dimension Oxygen storage capacity of catalyst 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 power switch on (IG), 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 power switch on (IG), 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 power switch on (IG), 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 power switch on (IG), 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 power switch on (IG), 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.
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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 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 status, enter the following menus: Powertrain / Engine and ECT / Monitor / Status2. When the status of a Readiness Monitor 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 the status of vehicle Readiness Monitors to show Complete before beginning emission tests. The Readiness Monitors will be reset to Incomplete if: The ECM has lost battery power or blown a fuse. DTCs have been cleared. The conditions for running the Readiness Monitor have not been met. If a 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).
- CATALYST MONITOR (ACTIVE AIR FUEL RATIO CONTROL TYPE) Preconditions The monitor will not run unless: The MIL is OFF. Drive Pattern (1) Connect the Techstream to the DLC3. (2) Turn the power switch on (IG). (3) Turn the Techstream on. (4) Clear DTCs (if set). Refer to «DTC CHECK / CLEAR»(ref-393183-S13119469612011040700000) . (5) Put the engine in inspection mode. Refer to «INSPECTION MODE PROCEDURE»(ref-393046-S20890913792011040700000) . (6) Start the engine and warm it up [A]. (7) Drive the vehicle at between 40 mph and 70 mph (64 km/h and 113 km/h) for at least 10 minutes [B]. Monitor Status Check the Readiness Monitor status displayed on the Techstream. If the status does not switch to Complete, extend the driving time.
- EVAP SYSTEM 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. (2438 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). The vehicle was driven in a city area (or on a free-way) for 10 minutes or more. Monitor Conditions Turn the power switch off and wait for 5 to 10 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 power switch on (IG). Turn the Techstream on. Check the Readiness Monitor status displayed on the Techstream. 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 AND HEATED OXYGEN SENSOR MONITORS (ACTIVE AIR FUEL RATIO CONTROL TYPE) 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. Drive Pattern for front air fuel ratio sensor and heated oxygen sensor (1) Connect the Techstream to the DLC3. (2) Turn the power switch on (IG). (3) Turn the Techstream on. (4) Clear DTCs. Refer to «DTC CHECK / CLEAR»(ref-393183-S13119469612011040700000) . (5) Put the engine in inspection mode. Refer to «INSPECTION MODE PROCEDURE»(ref-393046-S20890913792011040700000) . (6) Start the engine and warm it up until the engine coolant temperature reaches 75°C (167°F) [A]. (7) Drive the vehicle at between 38 mph (60 km/h) and 75 mph (120 km/h) for at least 10 minutes [B]. (8) Move the shift lever to B [C]. (9) Accelerate the vehicle to 40 mph (64 km/h) or more by depressing the accelerator pedal for at least 10 seconds [D]. (10) Soon after performing step [D] above, release the accelerator pedal for at least 8 seconds without depressing the brake pedal, in order to execute fuel-cut control [E]. (11) Allow the vehicle to decelerate until the vehicle speed declines to less than 6 mph (10 km/h) [F]. (12) Repeat steps from [D] through [F] above at least 3 times in one driving cycle [G]. Monitor Status Check the Readiness Monitor status displayed on the Techstream. If the status does not switch to Complete, make sure that the preconditions have been met, and then perform steps from [A] through [G] in Drive Pattern above.
- 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 (1) Connect the Techstream to the DLC3. (2) Turn the power switch on (IG). (3) Turn the Techstream on. (4) Clear DTCs (if set). Refer to «DTC CHECK / CLEAR»(ref-393183-S13119469612011040700000) . (5) Put the engine in inspection mode. Refer to «INSPECTION MODE PROCEDURE»(ref-393046-S20890913792011040700000) . (6) Start the engine [A]. (7) Allow the engine to idle for 10 minutes or more [B]. (8) Drive the vehicle at 25 mph (40 km/h) or more for at least 2 minutes [C]. Monitor Status Check the Readiness Monitor status displayed on the Techstream. If the status does not switch to Complete, make sure that the preconditions have been met, and repeat steps [A] to [C] described in the Drive Pattern above.
CHECK MODE PROCEDURE
Compared to normal mode, check mode is more sensitive to malfunctions. Therefore, check mode can detect malfunctions that cannot 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 power switch is turned from on (IG) to on (ACC) or off while in check mode. Before changing modes, always check and note any DTCs and freeze frame data.
Scheme 137
- CHECK MODE PROCEDURE Check and ensure the following conditions: Battery voltage 11 V or more. Throttle valve fully closed. Push the P position switch. A/C switch off. Turn the power switch off. Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Enter the following menus: 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. Turn the power switch on (READY). Make sure that the MIL turns off. Simulate that the conditions of the malfunction described by the customer. Check DTCs and freeze frame data using the Techstream.
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 or stops fuel injection.
| DTC | Component | Fail-safe Operation | Fail-safe Deactivation Condition |
|---|---|---|---|
| P0031 P0032 P101D | Air fuel ratio sensor heater | ECM turns off air fuel ratio sensor heater | Power switch off |
| P0037 P0038 P102D | Heated oxygen sensor heater | ECM turns off heated oxygen sensor heater | Power switch off |
| P0102 P0103 | Mass air flow meter sub-assembly | ECM calculates ignition timing according to engine speed and throttle valve position | Pass condition detected |
| P0106 P0107 P0108 | Manifold absolute pressure sensor | ECM turns off EGR valve operate | Pass condition detected |
| P0112 P0113 | Intake air temperature sensor | ECM estimates intake air temperature to be 20°C (68°F) | Pass condition detected |
| P0115 P0117 P0118 | Engine coolant temperature sensor | ECM estimates engine coolant temperature to be 80°C (176°F) | Pass condition detected |
| P0120 P0121 P0122 P0123 P0220 P0222 P0223 P0604 P0606 P0607 P060A P060B P060E P0657 P2102 P2103 P2111 P2112 P2118 P2119 P2135 | Electronic throttle control system | ECM cuts off throttle actuator current and throttle valve returns to the 5.5° throttle position by return spring The ECM stops the engine and the vehicle can be driven using solely the hybrid system *1 | Pass condition detected and then power switch turned off |
| P0327 P0328 | Knock control sensor | ECM sets ignition timing to maximum retard | Power switch off |
| P0351 to P0354 | Ignition coil assembly (Igniter) | ECM cuts fuel | Pass condition detected |
| P0401 | EGR valve assembly | ECM assumes that EGR valve is closed, so that ignition timing controlled to a safe value | Pass condition detected |
| P0403 | EGR valve assembly | ECM assumes that EGR valve is closed, so that ignition timing controlled to a safe value | Pass condition detected |
| P216B | Engine water pump assembly | Output duty ratio of the WPO terminal repeats a cycle of 0% for 30 seconds and then 85% for 5 seconds*2 | Power switch off |
| P261C | Engine water pump assembly | Output duty ratio of the WPO terminal remains at 0%*2 | Power switch off |
| P261D | Engine water pump assembly | Output duty ratio of the WPO terminal remains at 0%*2 | Power switch off |
HINT
- *1: The vehicle can be driven slowly when the accelerator pedal is depressed firmly and slowly.
- *2: When the coolant temperature reaches 105°C (221°F), the engine is stopped and the hybrid system is solely used to driving vehicle.