428 2UZ-FE ENGINE CTROL SYSTEM SFI SYSTEM EVP System RELTED DTCS DTC No. Monitoring Items See procedure P043E P043F P0441 P0450 P0451 P0452 P0453 P0455 P0456 P2401 P2402 P2419 Reference orifice clogged (built into canister pump module) Reference orifice high-flow (built into canister pump module) stuck closed stuck open Purge flow Canister pressure sensor (built into canister pump module) voltage abnormal fluctuation Canister pressure sensor (built into canister pump module) noising Canister pressure sensor stuck (built into canister pump module) Canister pressure sensor (built into canister pump module) voltage low Canister pressure sensor (built into canister pump module) voltage high EVP gross leak EVP small leak Leak detection pump stuck OFF (built into canister pump module) Leak detection pump stuck (built into canister pump module) Vent valve stuck closed (built into canister pump module) -237-243 -251-258 -387-393 P2420 Vent valve stuck open (vent) (built into canister pump module) P2610 Soak timer (built into ECM) -413 If any EVP system DTCs are set, the malfunctioning area can be determined using the table below.
2UZ-FE ENGINE CTROL SYSTEM SFI SYSTEM 429 Malfunctioning reas Reference orifice clogged DTCs P043E P0441 P0450 P0451 P0452 P0453 P0455 P0456 P2401 P2419 P2420 P043F P2402 Reference orifice high-flow stuck open stuck closed Canister pressure sensor stuck Canister pressure sensor noise Canister pressure sensor low output Canister pressure sensor high output Gross leak Small leak Leak detection pump stuck OFF Leak detection pump stuck Vent valve stuck closed Vent valve stuck open (vent) 106731E06 NOTICE: If the 0.02 inch leak criterion difference between the first and second checks is greater than the specification, the DTCs corresponding to the 0.02 inch leak criterion (P043E, P043F, P0441, P0455, P0456, P2401 and P2420) will all be stored.
430 2UZ-FE ENGINE CTROL SYSTEM SFI SYSTEM DCRIPTI Location of EVP (Evaporative Emission) System: Pump Module Pressure Sensor Vacuum Pump Vent Valve (Vacuum Switching Valve) EVP Hose Fuel Tank Canister ir Filter (From Canister) Refueling Valve EVP Hose (To Throttle ody) Purge Line reeding Pipe Fuel Tank Cap ir Inlet Port 130715E01 EVP System Circuit: ir Cleaner Intake Manifold Throttle Valve ECM Pump Module Soak Timer Canister ir Filter Refueling Valve Restrictor (0.08 inch) Roll-Over Valve Cut-Off Valve Fuel Tank 130686E01 NOTICE: In this vehicle's EVP system, turning the vent valve does not seal off the EVP system. To check for leaks in the EVP system, disconnect the air inlet vent hose and apply pressure from the atmosphere side of the canister.
2UZ-FE ENGINE CTROL SYSTEM SFI SYSTEM 431 While the engine is running, if a predetermined condition (closed-loop etc.) is met, the purge VSV is opened by the ECM and stored fuel vapors in the canister are purged to the intake manifold. The ECM changes the duty cycle ratio of the purge VSV to control purge flow volume. The purge flow volume is also determined by the intake manifold pressure. tmospheric pressure is allowed into the canister through the vent valve to ensure that the purge flow is maintained when the negative pressure (vacuum) is applied to the canister. The following two monitors run to confirm appropriate EVP system operation. 1. Key-off monitor This monitor checks for Evaporative Emission (EVP) system leaks and canister pump module malfunctions. The monitor starts 5 hours* after the ignition switch is turned OFF. More than 5 hours are required to allow the fuel to cool down to stabilize the Fuel Tank Pressure (FTP), thus making the EVP system monitor more accurate. The leak detection pump creates negative pressure (vacuum) in the EVP system and the pressure is measured. Finally, the ECM monitors for leaks from the EVP system and malfunctions in both the canister pump module and purge VSV, based on the EVP pressure. *: If the engine coolant temperature is not below 35 C (95 F) 5 hours after the ignition switch is turned OFF, the monitor check starts 2 hours later. If it is still not below 35 C (95 F) 7 hours after the ignition switch is turned OFF, the monitor check starts 2.5 hours later. 2. Purge flow monitor The purge flow monitor consists of the two monitors. The 1st monitor is conducted every time and the 2nd monitor is conducted if necessary. The 1st monitor While the engine is running and the purge Vacuum Switching Valve (VSV) is (open), the ECM monitors the purge flow by measuring the EVP pressure change. If negative pressure is not created, the ECM begins the 2nd monitor.
432 2UZ-FE ENGINE CTROL SYSTEM SFI SYSTEM The 2nd monitor The vent valve turned OFF (open) and the EVP pressure is then measured. If the variation in the pressure is less than 0.5 kpa (3.75 mmhg), the ECM interprets this as the purge VSV being stuck closed, and illuminates the MIL and sets DTC P0441 (2 trip detection logic). tmospheric pressure check: In order to ensure reliable malfunction detection, the variation between the atmospheric pressures, before and after conduction of the purge flow monitor, is measured by the ECM. EVP Purge Flow: Fuel Cap Reference Orifice (0.02 inch) Canister Pressure Sensor Refueling Valve To tmosphere () Fuel Tank Canister To Intake Manifold ECM Soak Timer Canister Filter Leak Detection Pump (OFF) Vent Valve (OFF) Canister Pump Module 122571E01 Components Canister Cut-off valve Purge Vacuum Switching Valve (VSV) Refueling valve Roll-over valve Soak timer Canister pump module Operations Contains activated charcoal to absorb EVP generated in fuel tank. Located in fuel tank. Valve floats and closes when fuel tank 100% full. Opens or closes line between canister and intake manifold. ECM uses purge VSV to control EVP purge flow. In order to discharge EVP absorbed by canister to intake manifold, ECM opens purge VSV. EVP discharge volume to intake manifold controlled by purge VSV duty cycle ratio (current-carrying time) (open:, closed: OFF). Controls EVP pressure from fuel tank to canister. Valve consists of diaphragm, spring and restrictor (diameter: 0.08 inch). When fuel vapor and pressure inside fuel tank increase, valve opens. While EVP purged, valve closes and restrictor prevents large amount of vacuum from affecting pressure in fuel tank. Valve opens while refueling. Located in fuel tank. Valve closes by its own weight when vehicle overturns to prevent fuel from spilling out. uilt into ECM. To ensure accurate EVP monitor, measures 5 hours* (+-15 min) after ignition switch OFF. This allows fuel to cool down, stabilizing Fuel Tank Pressure (FTP). When approximately 5 hours* elapsed, ECM activates. Consists of to (d) below. canister pump module cannot be disassembled.
2UZ-FE ENGINE CTROL SYSTEM SFI SYSTEM 433 Components Vent valve Canister pressure sensor Leak detection pump (d) Reference orifice Operations Vents and closes EVP system. When ECM turns valve, EVP system closed. When, ECM turns valve OFF, EVP system vented. Negative pressure (vacuum) created in EVP system to check for EVP leaks by closing purge VSV, turning vent valve (closed) and operating leak detection pump (refer to fig. 1). Indicates pressure as voltage. ECM supplies regulated 5 V to canister pressure sensor, and uses feedback from sensor to monitor EVP system pressure (refer to fig. 2). Creates negative pressure (vacuum) in EVP system for leak check. Has opening with 0.02 inch diameter. Vacuum produced through orifice by closing purge VSV, turning vent valve OFF and operating leak detection pump, to monitor 0.02 inch leak criterion. 0.02 inch leak criterion indicates small leak of EVP. *: If the engine coolant temperature is not below 35 C after 5 hours after the ignition switch is turned off, the monitor check starts 2 hours later. If it is still not below 35 C 7 hours after the ignition switch is turned off, the monitor check starts 2.5 hours later. Canister Pump Module (fig. 1): Condition: Purge Flow Vent Valve: OFF (vent) Canister : irflow To Canister Filter (tmosphere): Condition: Leak Check Reference Orifice Canister Pressure Sensor Vent Valve: (closed) From Refueling Valve Leak Detection Pump: OFF Leak Detection Pump: 097611E07
434 2UZ-FE ENGINE CTROL SYSTEM SFI SYSTEM Canister Pressure Sensor Specification (fig. 2): Output Voltage Malfunction rea 4.900 V 4.150 V 1.425 V 0.450 V Usable Range Malfunction rea 60 kpa 110 kpa (450 mmhg) (825 mmhg) Pressure Standard atmospheric pressure is 101.3 kpa (759.8mmHg) 115543E02 Soak Timer Circuit (fig.3) Ignition Switch ECM IGSW EFI + POWER SOURCE IC MREL Main Relay Control IC Soak Timer IC attery 115729E10
2UZ-FE ENGINE CTROL SYSTEM SFI SYSTEM 435 WIRING DIGRM ECM L-W W-G J4 J/C L-W 17 IC3 35 W-G IC4 J28 V2 VSV (EVP) 12 J/C L-W L-W L-W Y-R IM1 C C 2 1 8 E8 34 E4 MREL PRG 1 2 2 2 2 2 1 3 5 2 2 2 EFI No. 2 Engine Room R/ 1 I2 L-W Engine EFI Room R/ Relay L4 Canister Pump Module L-W 9 2 4 3 8 1 R L-R 43 IE1 42 IE1 R R-G O R L-R 22 IM2 7 IM2 17 IE1 11 IE1 28 IE1 R L-R R R-G O 28 E4 23 E4 22 E8 5 E8 6 E8 E2 VC PPMP VPMP MPMP J/C W- J2 J3 W- L 2 Engine Room R/ EFI 2 1 2 attery E 133741E01 INSPECTI PROCEDURE NOTICE: The intelligent tester is required to conduct the following diagnostic troubleshooting procedure. Using the intelligent tester monitor results enables the EVP system to be confirmed. Read freeze frame data using the intelligent tester. 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 running or stopped, 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.
436 2UZ-FE ENGINE CTROL SYSTEM SFI SYSTEM 1 CFIRM DTC (d) (e) (f) (g) Turn the ignition switch OFF and wait for 10 seconds. Turn the ignition switch. Turn the ignition switch OFF and wait for 10 seconds. Connect the intelligent tester to the DLC3 with CN VIM. Turn the ignition switch. Enter the following menus: DIGNOSIS / ENHNCED OD II/ DTC INFO / CURRENT COD. Confirm DTCs and freeze frame data. If any EVP system DTCs are set, the malfunctioning area can be determined using the table below. NOTICE: If the 0.02 inch leak criterion difference between the first and second checks is greater than the specification, the DTCs corresponding to the 0.02 inch leak criterion (P043E, P043F, P0441, P0455, P0456, P2401 and P2420) will all be stored. Malfunctioning reas Reference orifice clogged DTCs P043E P0441 P0450 P0451 P0452 P0453 P0455 P0456 P2401 P2419 P2420 P043F P2402 Reference orifice high-flow stuck open stuck closed Canister pressure sensor stuck Canister pressure sensor noise Canister pressure sensor low output Canister pressure sensor high output Gross leak Small leak Leak detection pump stuck OFF Leak detection pump stuck Vent valve stuck closed Vent valve stuck open (vent) 106731E06
2UZ-FE ENGINE CTROL SYSTEM SFI SYSTEM 437 NEXT 2 PERFORM EVP SYSTEM CHECK (UTO OPERTI) NOTICE: The EVP SYSTEM CHECK (UTO OPERTI) consists of five steps performed automatically by the intelligent tester. It takes a maximum of approximately 18 minutes. Do not perform the EVP SYSTEM CHECK when the fuel tank is more than 90 % full because the cut-off valve may be closed, making the leak check of the fuel tank not possible. Do not run the engine in this step. When the temperature of the fuel is 35 C (95 F) or more, a large amount of vapor forms and any check results become inaccurate. When performing the EVP SYSTEM CHECK, keep the temperature below 35 C (95 F). Clear the DTCs (See page -35). Enter the following menus: DIGNOSIS / ENHNCED OD II / SYSTEM CHECK / EVP SYS CHECK / UTO OPERTI. fter the EVP SYSTEM CHECK is completed, check for pending DTCs by entering the following menus: DIGNOSIS / ENHNCED OD II / DTC INFO / PENDING COD. If no pending DTC is displayed, perform the Monitor Confirmation (see "Diagnostic Help" menu). fter this confirmation, check for pending DTCs. If no DTC is displayed, the EVP system is normal. NEXT
438 2UZ-FE ENGINE CTROL SYSTEM SFI SYSTEM 3 PERFORM EVP SYSTEM CHECK (MNUL OPERTI) EVP SYSTEM CHECK : Open OFF: Closed Vent Valve : Closed OFF: Vent Leak Detection Pump EVP Pressure Positive Gross Leak Negative 0.02 Inch Leak Criterion Small Leak [Second 0.02 Inch Leak Criterion] x 0.2 No Leak Normal Pressure Steps 1/5 2/5 3/5 4/5 5/5 Time (Second) 10 60 Within 15 minutes 10 60 (Reference) 106735E06 NOTICE: In the EVP SYSTEM CHECK (MNUL OPERTI), the series of 5 EVP SYSTEM CHECK steps are performed manually by the intelligent tester. Do not perform the EVP SYSTEM CHECK when the fuel tank is more than 90 % full because the cut-off valve may be closed, making the leak check of the fuel tank not possible. Do not run the engine in this step. When the temperature of the fuel is 35 C (95 F) or more, a large amount of vapor forms and any check results become inaccurate. When performing the EVP SYSTEM CHECK, keep the temperature below 35 C (95 F). Clear the DTCs (See page -35). Enter the following menus: DIGNOSIS / ENHNCED OD II / SYSTEM CHECK / EVP SYS CHECK / MNUL OPERTI. NEXT
2UZ-FE ENGINE CTROL SYSTEM SFI SYSTEM 439 4 PERFORM EVP SYSTEM CHECK (STEP 1/5) Vent Valve Leak Detection Pump EVP Pressure Positive Negative Canister Pressure Sensor Noise : Open OFF: Closed : Closed OFF: Vent First Reference Pressure OK Steps Time (Second) (Reference) 1/5 10 106736E04 Check the EVP pressure in step 1/5. DTC No. * Test s Suspected Trouble reas Proceed to - P0451 Virtually no variation in EVP pressure EVP pressure fluctuates by +- 0.3 kpa (2.25 mmhg) or more Not yet determined Canister pressure sensor noise *: These DTCs are already present in the ECM when the vehicle arrives and are confirmed in step 1. Go to step 30
440 2UZ-FE ENGINE CTROL SYSTEM SFI SYSTEM 5 PERFORM EVP SYSTEM CHECK (STEP 1/5 TO 2/5) Vent Valve Leak Detection Pump EVP Pressure Positive Negative 0.02 Inch Leak Criterion Leak Detection Pump Stuck : Open OFF: Closed : Closed OFF: Vent Steps Time (Second) (Reference) 1/5 2/5 10 60 106737E04 Check the EVP pressure in step 1/5 and 2/5. DTC No. * Test s Suspected Trouble reas Proceed to - P2402 Virtually no variation in EVP pressure during step 1/5. Then decreases to 0.02 inch leak criterion Small difference between EVP pressures during steps 1/5 and 2/5 Not yet determined Leak detection pump stuck *: These DTCs are already present in the ECM when the vehicle arrives and are confirmed in step 1. The first 0.02 inch leak criterion is the value determined in step 2/5. Go to step 23
2UZ-FE ENGINE CTROL SYSTEM SFI SYSTEM 441 6 PERFORM EVP SYSTEM CHECK (STEP 2/5) Vent Valve : Open OFF: Closed : Closed OFF: Vent Leak Detection Pump EVP Pressure Positive 4 seconds Leak Detection Pump Stuck OFF Reference Orifice High-flow Negative Vent Valve Stuck Closed 0.02 Inch Leak Criterion OK Steps 1/5 2/5 3/5 Time (Second) 10 60 Within 15 minutes (Reference) 106738E04 Make a note of the pressures checked in the steps below. Check the EVP pressure 4 seconds after the leak detection pump is activated* [}. Check the EVP pressure again when it has stabilized. This pressure is the 0.02 inch leak criterion [}. *: The leak detection pump begins to operate as step 1/5 proceeds to step 2/5. DTC No. * Test s Suspected Trouble reas Proceed to - P043F and P2401 P043E P2419 EVP pressure in step [] between -4.85 kpa and -1.06 kpa (-36.38 mmhg and -7.95 mmhg) EVP pressure in step [] -1.06 kpa (-7.95 mmhg) or more EVP pressure in step [] below -4.85 kpa (-36.38 mmhg) EVP pressure in step [] more than -1.06 kpa (-7.95 mmhg) Not yet determined Reference orifice high-flow Leak detection pump stuck OFF Reference orifice clogged Vent valve stuck closed *: These DTCs are already present in the ECM when the vehicle arrives and are confirmed in step 1. C D
442 2UZ-FE ENGINE CTROL SYSTEM SFI SYSTEM C D Go to step 11 Go to step 30 Go to step 19 7 PERFORM EVP SYSTEM CHECK (STEP 2/5 TO 3/5) : Open OFF: Closed Vent Valve Leak Detection Pump : Closed OFF: Vent EVP Pressure Positive Negative 0.02 Inch Leak Criterion Vent Valve Stuck Open (vent) Steps 2/5 3/5 Time (Reference) Within 15 minutes Check the EVP pressure in step 3/5. 106739E04 DTC No. * Test s Suspected Trouble reas Proceed to - P2420 P0451 EVP pressure increases by 0.3 kpa (2.25 mmhg) or more within 10 seconds of proceeding from step 2/5 to step 3/5 No variation in EVP pressure despite proceeding from step 2/5 to step 3/5 No variation in EVP pressure during steps 1/5 through 3/5 Not yet determined Vent valve stuck open (vent) Canister pressure sensor malfunction (stuck) *: These DTCs are already present in the ECM when the vehicle arrives and are confirmed in step 1. C
2UZ-FE ENGINE CTROL SYSTEM SFI SYSTEM 443 C Go to step 20 Go to step 30 8 PERFORM EVP SYSTEM CHECK (STEP 3/5) Vent Valve : Open OFF: Closed : Closed OFF: Vent Leak Detection Pump EVP Pressure Positive Negative 0.02 Inch Leak Criterion Steps 3/5 Time (Reference) Within 15 minutes 106740E04 Wait until the EVP pressure change is less than 0.1 kpa (0.75 mmhg) for 30 seconds. Measure the EVP pressure and record it. few minutes are required for the EVP pressure to become saturated. When there is little fuel in the fuel tank, it takes up to 15 minutes (900 seconds). NEXT
444 2UZ-FE ENGINE CTROL SYSTEM SFI SYSTEM 9 PERFORM EVP SYSTEM CHECK (STEP 4/5) : Open OFF: Closed Vent Valve Leak Detection Pump EVP Pressure OK : Closed OFF: Vent Positive Negative 0.02 Inch Leak Criterion Stuck Closed Steps Time (Second) (Reference) 4/5 10 Check the EVP pressure in step 4/5. 106741E04 DTC No. * Test s Suspected Trouble reas Proceed to - P0441 P0441 EVP pressure increases by 0.3 kpa (2.25 mmhg) or more within 10 seconds of proceeding from step 3/5 to step 4/5 EVP pressure increases by 0.3 kpa (2.25 mmhg) or more within 10 seconds of proceeding from step 3/5 to step 4/5 Variation in EVP pressure less than 0.3 kpa (2.25 mmhg) for 10 seconds, after proceeding from step 3/5 to step 4/5 Not yet determined Problems in EVP hose between purge VSV and intake manifold stuck closed *: These DTCs are already present in the ECM when the vehicle arrives and are confirmed in step 1. C C Go to step 15 Go to step 12
2UZ-FE ENGINE CTROL SYSTEM SFI SYSTEM 445 10 PERFORM EVP SYSTEM CHECK (STEP 5/5) : Open OFF: Closed Vent Valve Leak Detection Pump : Closed OFF: Vent EVP Pressure Positive Gross Leak Negative 0.02 Inch Leak Criterion Small Leak [Second 0.02 Inch Leak Criterion] x 0.2 Steps No Leak 5/5 Second 0.02 Inch Leak Criterion Time (Second) 60 (Reference) 106735E07 Check the EVP pressure in step 5/5. Compare the EVP pressure in step 3/5 and the second 0.02 inch leak criterion (step 5/5). DTC No. * Test s Suspected Trouble reas Proceed to - P0441 and P0455 P0456 EVP pressure (step 3/5) lower than second 0.02 inch leak criterion (step 5/5) EVP pressure (step 3/5) higher than [second 0.02 inch leak criterion (step 5/5) x 0.2] EVP pressure (step 3/5) higher than second 0.02 inch leak criterion (step 5/5) Not yet determined stuck open EVP gross leak EVP small leak *: These DTCs are already present in the ECM when the vehicle arrives and are confirmed in step 1. Go to step 36 Go to step 12
446 2UZ-FE ENGINE CTROL SYSTEM SFI SYSTEM 11 PERFORM EVP SYSTEM CHECK (STEP 3/5) Vent Valve : Open OFF: Closed : Closed OFF: Vent Leak Detection Pump EVP Pressure Positive Negative 0.02 Inch Leak Criterion Leak Detection Pump Stuck OFF Reference Orifice High-flow Steps 2/5 3/5 Time (Reference) Within 15 minutes Check the EVP pressure in step 3/5. 106742E03 DTC No. * Test s Suspected Trouble reas Proceed to P043F P2401 EVP pressure less than [0.02 inch leak criterion] measured at 2/5 EVP pressure almost same as [0.02 inch leak criterion] measured at 2/5 Reference orifice high-flow Leak detection pump stuck OFF *: These DTCs are already present in the ECM when the vehicle arrives and are confirmed in step 1. The first 0.02 inch leak criterion is the value determined in step 2/5. Go to step 30 Go to step 23
2UZ-FE ENGINE CTROL SYSTEM SFI SYSTEM 447 12 PERFORM CTIVE TT Y INTELLIGENT TTER (PURGE VSV) Hose 115730E01 (d) (e) (f) (g) Enter the following menus: DIGNOSIS / ENHNCED OD II / CTIVE TT / EVP VSV. Disconnect the hose (connected to the canister) from the purge VSV. Turn the ignition switch. Using the tester, turn the purge VSV OFF (EVP VSV: OFF). Use your finger to confirm that the purge VSV has no suction. Using the tester, turn the purge VSV (EVP VSV: ). Use your finger to confirm that the purge VSV has suction. Test s Suspected Trouble reas Proceed to No suction when purge VSV turned OFF, and suction applied when turned normal Suction applied when purge VSV turned OFF stuck open No suction when purge VSV turned stuck closed Problems with EVP hose between purge VSV and intake manifold C C Go to step 14 Go to step 15 13 CHECK FUEL CP (d) (e) (f) Check that the fuel cap is correctly installed. (1) Tighten the fuel cap until a few click sounds are heard. If an EVP tester is available, use the tester to check the fuel cap. Remove the fuel cap and install it onto the fuel cap adaptor. Connect an EVP tester pump hose to the adaptor, and pressurize the cap to 3.2 to 3.7 kpa (24 to 28 mmhg) using an EVP tester pump. Seal the adaptor and wait for 2 minutes. Check the pressure. If the pressure is 2 kpa (15 mmhg) or more, the fuel cap is normal. Reinstall the fuel cap. Test s Suspected Trouble reas Proceed to Fuel cap correctly installed -
448 2UZ-FE ENGINE CTROL SYSTEM SFI SYSTEM Test s Suspected Trouble reas Proceed to Fuel cap loose Fuel cap improperly installed Defective fuel cap Fuel cap does not meet OEM specifications No fuel cap - C Go to step 29 Go to step 27 C Go to step 28 14 INSPECT PURGE VSV Hose (d) (e) Turn the ignition switch OFF. Disconnect the V2 purge VSV connector. Disconnect the hose (connected to the canister) from the purge VSV. Start the engine. Use your finger to confirm that the purge VSV has no suction. 115731E01 Test s Suspected Trouble reas Proceed to No suction ECM Suction applied (f) Reconnect the purge VSV connector. Go to step 35 Go to step 31 15 CHECK EVP HOSE (PURGE VSV - INTKE MNIFOLD) Hose Disconnect the hose (connected to the intake manifold) from the purge VSV. Start the engine. Use your finger to confirm that the hose has suction. 115730E01 Test s Suspected Trouble reas Proceed to Suction applied EVP hose between purge VSV and intake manifold normal
2UZ-FE ENGINE CTROL SYSTEM SFI SYSTEM 449 Test s Suspected Trouble reas Proceed to No suction Intake manifold port EVP hose between purge VSV and intake manifold Go to step 26 16 INSPECT DUTY PURGE VSV attery Remove the purge VSV connector. pply battery voltage to the terminals of the purge VSV. Using an air gun, confirm that air flows from port to port. ir 133742E01 Test s Suspected Trouble reas Proceed to ir flows normal No air flows Go to step 31 17 CHECK HRNS ND CNECTOR (POWER SOURCE OF PURGE VSV) Wire Harness Side Connector V2 Disconnect the V2 purge VSV connector. Turn the ignition switch. Measure the voltage between terminal 2 of the purge VSV connector and the body ground. Front View 052933E30 Test s Suspected Trouble reas Proceed to etween 11 V and 14 V Normal Other than result above Wire harness or connectors between purge VSV and ECM (d) Reconnect the purge VSV connector. Go to step 32
450 2UZ-FE ENGINE CTROL SYSTEM SFI SYSTEM 18 CHECK HRNS ND CNECTOR (PURGE VSV - ECM) Wire Harness Side Connector Disconnect the V2 purge VSV connector. Disconnect the E4 ECM connector. Measure the resistance of the wire harness side connectors. Standard resistance V2 E4 Front View ECM Connector Tester Connection Specified Condition V2-1 - PRG (E4-34) elow 1 Ω V2-1 or PRG (E4-34) - ody ground 10 kω or higher V2-1 - ody ground (d) Reconnect the ECM connector. (e) Reconnect the purge VSV connector. OK Go to step 35 NG Go to step 32 PRG 115732E02 19 PERFORM CTIVE TT Y INTELLIGENT TTER (FOR VENT VLVE) ECM Connector E8 VPMP Turn the ignition switch. Enter the following menus: DIGNOSIS / ENHNCED OD II / CTIVE TT / VENT VLVE (LE). Measure the voltage between terminal VPMP of the ECM connector and the body ground when the vent valve is turned (close) and OFF (vent) using the tester. E118245E26 Test s Suspected Trouble reas Proceed to etween 9 V and 14 V when OFF elow 3 V when Vent valve elow 3 V when OFF and ECM Go to step 22 Go to step 35
2UZ-FE ENGINE CTROL SYSTEM SFI SYSTEM 451 20 PERFORM CTIVE TT Y INTELLIGENT TTER (FOR VENT VLVE) ECM Connector E8 VPMP Turn the ignition switch. Enter the following menus: DIGNOSIS / ENHNCED OD II / CTIVE TT / VENT VLVE (LE). Measure the voltage between terminal VPMP of the ECM connector and the body ground when the vent valve is turned (close) and OFF (vent) using the tester. E118245E26 Test s Suspected Trouble reas Proceed to elow 3 V when OFF and Power source of vent valve etween 9 V and 14 V when OFF elow 3 V when Vent valve etween 9 V and 14 V when OFF and ECM C C Go to step 22 Go to step 35 21 INSPECT CNISTER PUMP MODULE (POWER SOURCE FOR VENT VLVE) (d) Turn the ignition switch OFF. Disconnect the L4 canister connector. Turn the ignition switch. Measure the voltage between terminal 9 of the canister connector and the body ground. L4 Wire Harness Side Canister Connector L4 Front View 115733E02
452 2UZ-FE ENGINE CTROL SYSTEM SFI SYSTEM Test s Suspected Trouble reas Proceed to etween 9 V and 14 V Normal etween 0 V and 3 V Power source wire harness of vent valve Go to step 32 22 INSPECT CNISTER PUMP MODULE (VENT VLVE OPERTI) Charcoal Canister ssembly 8(-) 9(+) (d) Turn the ignition switch OFF. Disconnect the L4 canister connector. pply the battery voltage to terminals 9 and 8 of the canister pump module. Touch the canister pump module to confirm the vent valve operation. 115734E01 Test s Suspected Trouble reas Proceed to Operating Wire harness between vent valve and ECM Not operating Vent valve (e) Reconnect the canister connector. Go to step 32 Go to step 30 23 PERFORM CTIVE TT Y INTELLIGENT TTER (FOR CNISTER PUMP MODULE [LEK DETECTI PUMP]) ECM Connector E8 Enter the following menus: DIGNOSIS / ENHNCED OD II / CTIVE TT / VCUUM PUMP (LE). Measure the voltage between MPMP terminal of the ECM connector and the body ground when the leak detection pump is turned and OFF using the tester. MPMP E118245E27 Test s Suspected Trouble reas Proceed to etween 0 V and 3 V when OFF etween 9 V and 14 V when ECM normal etween 9 V and 14 V when OFF etween 0 V and 3 V when ECM
2UZ-FE ENGINE CTROL SYSTEM SFI SYSTEM 453 Go to step 35 24 CHECK HRNS ND CNECTOR (CNISTER PUMP MODULE - ECM) L4 (d) (e) (f) Turn the ignition switch OFF. Disconnect the L4 canister connector. Turn the ignition switch. Enter the following menus: DIGNOSIS / ENHNCED OD II / CTIVE TT / VCUUM PUMP (LE). Turn the leak detection pump. Measure the voltage between terminal 1 of the canister connector and the body ground. Wire Harness Side Canister Connector L4 Front View 115733E02 Test s Suspected Trouble reas Proceed to etween 9 V and 14 V Normal etween 0 V and 3 V Wire harness between ECM and leak detection pump (g) Reconnect the canister connector. Go to step 32 25 CHECK HRNS ND CNECTOR (CNISTER PUMP MODULE - GROUND) Wire Harness Side L4 Canister Connector Disconnect the L4 canister connector. Turn the ignition switch OFF. Measure the resistance of the wire harness side connectors between terminal 6 of the canister connector and the body ground. Front View 085258E53
454 2UZ-FE ENGINE CTROL SYSTEM SFI SYSTEM Test s Suspected Trouble reas Proceed to elow 1 Ω Leak detection pump 10 kω or higher Wire harness between leak detection pump and body ground (d) Reconnect the canister connector. Go to step 30 Go to step 32 26 INSPECT INTKE MNIFOLD (EVP PURGE PORT) (d) Turn the ignition switch OFF. Disconnect the EVP hose from the throttle body. Start the engine. Use your finger to confirm that the port of the throttle body has suction. Test s Suspected Trouble reas Proceed to Suction applied EVP hose between intake manifold and purge VSV No suction Intake manifold Go to step 33 Go to step 34 27 CORRECTLY REINSTLL OR REPLCE FUEL CP When reinstalling the fuel cap, tighten it until a few click sounds are heard. When replacing the fuel cap, use a fuel cap that meets OEM specifications, and tighten it until a few click sounds are heard. NEXT Go to step 37 28 REPLCE FUEL CP When installing the fuel cap, tighten it until a few click sounds are heard. NEXT Go to step 37 29 LOCTE EVP LEK Reinstall the fuel cap. Disconnect the vent hose.
2UZ-FE ENGINE CTROL SYSTEM SFI SYSTEM 455 Canister Disconnect the Vent Hose here. Fuel Cap 130688E01 Connect the EVP pressure tester tool to the canister with the adapter. Canister Pressure Gauge ir Filter dapter 130689E01 (d) Pressurize the EVP system to 3.2 to 3.7 kpa (24 to 28 mmhg). (e) pply soapy water to the piping and connecting parts of the EVP system. (f) Look for areas where bubbles appear. This indicates leak point. (g) Repair or replace the leak point.
456 2UZ-FE ENGINE CTROL SYSTEM SFI SYSTEM Disconnect the hose between the canister and the fuel tank from the canister. lock the canister side and conduct an inspection. In this way, the fuel tank can be excluded as an area suspected of causing fuel leaks. NEXT Go to step 37 30 REPLCE CNISTER SSEMLY Replace the canister assembly. NOTICE: When replacing the canister, check the canister pump module interior and related pipes for water, fuel or other liquids. If liquids are present, check for disconnections and/or cracks in the following: 1) the pipe from the air inlet port to the canister pump module; 2) the canister filter; and 3) the fuel tank vent hose. NEXT Go to step 37 31 REPLCE DUTY PURGE VSV (d) Disconnect the connector and hoses from the purge VSV. Remove the purge VSV. Install a new purge VSV. Reconnect the connector and hose. NEXT Go to step 37 32 REPIR OR REPLCE HRNS ND CNECTOR NEXT Go to step 37 33 REPLCE EVP HOSE (INTKE MNIFOLD - PURGE VSV) NEXT Go to step 37 34 INSPECT INTKE MNIFOLD (EVP PURGE PORT) Remove the throttle body (See page -495). Check that the EVP purge port of the intake manifold is not clogged. If necessary, replace the intake manifold. NEXT Go to step 37
2UZ-FE ENGINE CTROL SYSTEM SFI SYSTEM 457 35 REPLCE ECM Replace the ECM (See page -510). NEXT Go to step 37 36 REPIR OR REPLCE PRTS ND COMPENTS INDICTED Y OUTPUT DTCS Repair the malfunctioning areas indicated by the DTCs that had been confirmed when the vehicle was brought in. NEXT Go to step 37 37 PERFORM EVP SYSTEM CHECK (UTO OPERTI) NEXT NOTICE: The EVP SYSTEM CHECK (UTO OPERTI) consists of five steps performed automatically by the intelligent tester. It takes a maximum of approximately 18 minutes. Do not perform the EVP SYSTEM CHECK when the fuel tank is more than 90 % full because the cut-off valve may be closed, making the leak check of the fuel tank not possible. Do not run the engine in this step. When the temperature of the fuel is 35 C (95 F) or more, a large amount of vapor forms and any check results become inaccurate. When performing an EVP SYSTEM CHECK, keep the temperature below 35 C (95 F). Clear the DTCs (See page -35). Enter the following menus: DIGNOSIS / ENHNCED OD II / SYSTEM CHECK / EVP SYS CHECK / UTO OPERTI. fter the SYSTEM CHECK is completed, check for pending DTCs by entering the following menus: DIGNOSIS / ENHNCED OD II / DTC INFO / PENDING COD. If no pending DTC is found, the repair has been successfully completed. COMPLETED CFIRMTI DRIVING PTTERN fter a repair, check Monitor Status by performing the key-off monitor confirmation and purge flow monitor confirmation described below.
458 2UZ-FE ENGINE CTROL SYSTEM SFI SYSTEM 1. Key-off monitor confirmation Preconditions The monitor will not run unless: The vehicle has been driven for 10 minutes or more (in a city area or on a freeway) The fuel tank is less than 90 % full The altitude is less than 8,000 ft (2,400 m) The Engine Coolant Temperature (ECT) is between 4.4 to 35 C (40 to 95 F) The Intake ir Temperature (IT) is between 4.4 to 35 C (40 to 95 F) The vehicle remains stationary (the vehicle speed is 0 km/h (0 mph)) Monitor Conditions 1. llow the engine to idle for at least 5 minutes. 2. Turn the ignition switch OFF and wait for 6 hours (8 or 10.5 hours). Do not Start the engine until checking MITOR STTUS. If the engine is started, the steps described above must be repeated. Monitor Status 1. Connect the intelligent tester to the CN VIM. Then connect the CN VIM to the DLC3. 2. Turn the ignition switch and turn the tester. 3. Enter the following menus: DIGNOSIS / ENHNCED OD II / MITOR STTUS. 4. Check the Monitor Status displayed on the tester. If INCMP is displayed, the monitor is not completed. Make sure that the preconditions have been met, and perform the Monitor Conditions again. 2. Purge flow monitor confirmation (P0441) Perform this monitor confirmation after the key-off monitor confirmation shows COMPL (complete). Preconditions The monitor will not run unless: The vehicle has been driven for 10 minutes or more (in a city area or on a freeway) The ECT is between 4.4 to 35 C (40 to 95 F) The IT is between 4.4 to 35 C (40 to 95 F) Monitor Conditions 1. Release the pressure from the fuel tank by removing and reinstalling the fuel cap. 2. Warm the engine up until the ECT reaches more than 75 C (167 F). 3. Increase the engine speed to 3,000 rpm once. 4. llow the engine to idle and turn the /C for 1 minute. Monitor Status 1. Turn the ignition switch OFF (where or the engine is running). 2. Connect the intelligent tester to the CN VIM. Then connect the CN VIM to the DLC3. 3. Turn the ignition switch and turn the tester. 4. Enter the following menus: DIGNOSIS / ENHNCED OD II / MITOR STTUS. 5. Check the Monitor Status displayed on the tester. If INCMP is displayed, the monitor is not completed. Make sure that the preconditions have been met, and perform the "Monitor Conditions" procedures again. MITOR RULT Refer to CHECKING MITOR STTUS (See page -17).