2AZ-FE ENGINE CONTROL SYSTEM – SFI SYSTEM ES–1 ES SFI SYSTEM PRECAUTION NOTICE: • Perform RESET MEMORY (AT initialization) when replacing the automatic transmission assembly, engine assembly or ECM (See page AX-16). • Perform REGISTRATION (VIN registration) when replacing the ECM (See page ES-16). HINT: Initialization cannot be completed by removing the battery. ES–2 2AZ-FE ENGINE CONTROL SYSTEM – SFI SYSTEM ES DEFINITION OF TERMS Terms Definition Monitor Description Description of what ECM monitors and how detects malfunctions (monitoring purpose and details). Related DTCs Group of diagnostic trouble codes that are output by ECM based on the same malfunction detection logic. Typical Enabling Condition Preconditions that allow ECM to detect malfunctions. 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 involved in single malfunction detection process. Each sensor and component monitored in turn, when previous detection operation is completed. Required Sensor/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 only performs checks for that malfunction 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 Value, beyond which, ECM determines malfunctions exist and sets DTCs. MIL Operation Timing of MIL illumination after malfunction is detected. "Immediate" means ECM illuminates MIL as soon as malfunction is detected. "2 driving cycle" means ECM illuminates MIL if the same malfunction is detected second time in the next sequential driving cycle. 2AZ-FE ENGINE CONTROL SYSTEM – SFI SYSTEM ES–3 ES PARTS LOCATION PZEV: PURGE VSV CANISTER CANISTER PUMP MODULE FUEL PUMP ECM ENGINE ROOM R/B AND ENGINE ROOM J/B EFI NO. 3 FUSE EFI NO. 2 FUSE EFI NO. 1 FUSE (ENGINE ROOM J/B) - - EFI MAIN FUSE CIRCUIT OPENING RELAY MASS AIR FLOW METER EFI RELAY INTEGRATION RELAY A137360E01 ES–4 2AZ-FE ENGINE CONTROL SYSTEM – SFI SYSTEM ES EXCEPT PZEV: PURGE VSV CANISTER FUEL PUMP ECM ENGINE ROOM R/B AND ENGINE ROOM J/B EFI NO. 3 FUSE EFI NO. 2 FUSE EFI NO. 1 FUSE (ENGINE ROOM J/B) - - EFI MAIN FUSE CANISTER PUMP MODULE CIRCUIT OPENING RELAY MASS AIR FLOW METER EFI RELAY INTEGRATION RELAY A137361E01 2AZ-FE ENGINE CONTROL SYSTEM – SFI SYSTEM ES–5 ES PZEV: FUEL INJECTOR IGNITION COIL HEATED OXYGEN SENSOR PARK/NEUTRAL POSITION SW INTAKE MANIFOLD RUNNER VALVE (IMRV) CAMSHAFT POSITION SENSOR CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY CRANKSHAFT POSITION SENSOR ENGINE COOLANT TEMPERATURE SENSOR KNOCK SENSOR THROTTLE BODY AIR-FUEL RATIO SENSOR A135059E01 ES–6 2AZ-FE ENGINE CONTROL SYSTEM – SFI SYSTEM ES EXCEPT PZEV: FUEL INJECTOR IGNITION COIL AIR-FUEL RATIO SENSOR HEATED OXYGEN SENSOR PARK/NEUTRAL POSITION SW CAMSHAFT POSITION SENSOR CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY CRANKSHAFT POSITION SENSOR ENGINE COOLANT TEMPERATURE SENSOR KNOCK SENSOR THROTTLE BODY A132270E01 2AZ-FE ENGINE CONTROL SYSTEM – SFI SYSTEM ES–7 ES INSTRUMENT PANEL J/B COMBINATION METER CLUTCH START SWITCH IGNITION SWITCH STOP LIGHT SW DLC3 - IGN FUSE - STOP FUSE ACCELERATOR PEDAL ROD A132271E01 ES–8 2AZ-FE ENGINE CONTROL SYSTEM – SFI SYSTEM ES SYSTEM DIAGRAM M M EFI MAIN EFI No. 1 EFI No. 2 EFI No. 3 Purge VSV IGN IG SW ST/AM2 ALT AM1 AM1 AM2 IG1 IG2 C/OPN To C/OPN Combination Meter GAUGE No. 2 FL MAIN STOP Stop Light SW To IGN To IGN Battery To Battery STP ST1- E1 E01 E04 E03 IAC+*1 IAC-*1 W MIL ETCS IMRV (Intake Manifold Runner Valve) Motor +BM ALT Generator DLC3 TC FC TACH Fuel Pump ECM BATT +B +B2 MREL PRG IGSW *1: PZEV Only EFI To Park/Neutral Position SW A132314E01 2AZ-FE ENGINE CONTROL SYSTEM – SFI SYSTEM ES–9 ES Mass Air Flow Meter Engine Coolant Temperature Sensor Air-fuel Ratio Sensor Heated Oxygen Sensor Throttle Actuator No. 1 Fuel Injector No. 3 Fuel Injector No. 2 Fuel Injector No. 4 Fuel Injector Knock Sensor ECM GE01 #10 #20 #30 #40 E02 ME01 E2G VG THA ETHA THW ETHW To INJ HA1A A1A+ A1A- HT1B OX1B EX1B KNK1 EKNK M+ M- A132315E01 ES–10 2AZ-FE ENGINE CONTROL SYSTEM – SFI SYSTEM ES Crankshaft Position Sensor Camshaft Position Sensor Throttle Position Sensor IMRV Position Sensor Camshaft Timing Oil Control Valve No. 1 Ignition Coil No. 2 Ignition Coil No. 3 Ignition Coil No. 4 Ignition Coil Park/Neutral Position SW or Clutch Start SW To Starter To IG SW To IG SW ST To INJ *1: PZEV Only *2: Automatic Transaxle Only ECM OC1+ OC1- IGT1 IGT2 IGT3 IGT4 IGF1 NSW*2 STA NE+ NE- G2+ G2- VCTA VTA1 VTA2 ETA VCIA*1 IACA*1 EIA*1 A132316E01 2AZ-FE ENGINE CONTROL SYSTEM – SFI SYSTEM ES–11 ES M M M Combination Meter Transponder Key ECU Accelerator Pedal Position Sensor FAN No. 3 FAN No. 2 FAN No. 1 A/C Condenser Fan Motor To Battery To Battery Radiator Fan Motor Canister Pump Module Vent Valve Canister Pressure Sensor To EFI No. 3 Leak Detection Pump PS Oil Pressure SW ECM SPD FANL IMO IMI VCP2 VPA2 EPA2 VCPA VPA EPA FANH VPMP VCPP PPMP EPPM MPMP EC EOM CANH CANH CANL CANL PSW IC IC To IG1 A132317E01 ES–12 2AZ-FE ENGINE CONTROL SYSTEM – SFI SYSTEM ES HOW TO PROCEED WITH TROUBLESHOOTING HINT: *: Use the intelligent tester. NEXT NEXT HINT: If the display indicates a communication fault in the tester, inspect the DLC3. NEXT HINT: Record or print DTCs and freeze frame data, if necessary. NEXT NEXT NEXT NEXT 1 VEHICLE BROUGHT TO WORKSHOP 2 CUSTOMER PROBLEM ANALYSIS 3 CONNECT INTELLIGENT TESTER TO DLC3* 4 CHECK FOR DTC AND FREEZE FRAME DATA* 5 CLEAR DTC AND FREEZE FRAME DATA* 6 CONDUCT VISUAL INSPECTION 7 SET CHECK MODE DIAGNOSIS* 2AZ-FE ENGINE CONTROL SYSTEM – SFI SYSTEM ES–13 ES HINT: If the engine does not start, first perform the "CHECK DTC" procedures and "CONDUCT BASIC INSPECTION" procedures below. Result B A NEXT Result B A NEXT Result B 8 CONFIRM PROBLEM SYMPTOMS Result Proceed to Malfunction does not occur A Malfunction occurs B GO TO STEP 10 9 SIMULATE SYMPTOMS 10 CHECK FOR DTC* Result Proceed to Trouble code A No code B GO TO STEP 12 11 REFER TO DTC CHART GO TO STEP 14 12 CONDUCT BASIC INSPECTION Result Proceed to Malfunctioning parts not confirmed A Malfunctioning parts confirmed B GO TO STEP 17 ES–14 2AZ-FE ENGINE CONTROL SYSTEM – SFI SYSTEM ES A Result B A NEXT Result B A NEXT NEXT NEXT 13 REFER TO PROBLEM SYMPTOMS TABLE Result Proceed to Malfunctioning circuit confirmed A Malfunctioning parts confirmed B GO TO STEP 17 14 CHECK ECM POWER SOURCE CIRCUIT 15 CONDUCT CIRCUIT INSPECTION Result Proceed to Malfunction not confirmed A Malfunction confirmed B GO TO STEP 18 16 CHECK FOR INTERMITTENT PROBLEMS GO TO STEP 18 17 CONDUCT PARTS INSPECTION 18 IDENTIFY PROBLEM 2AZ-FE ENGINE CONTROL SYSTEM – SFI SYSTEM ES–15 ES NEXT NEXT 19 ADJUST AND/OR REPAIR 20 CONDUCT CONFIRMATION TEST END ES–16 2AZ-FE ENGINE CONTROL SYSTEM – SFI SYSTEM ES CHECK FOR INTERMITTENT PROBLEMS HINT: Inspect the vehicle's ECM using check mode. Intermittent problems are easier to detect with the intelligent tester 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 (See page ES-38). 2. Switch the ECM from normal mode to check mode using the intelligent tester (See page ES-41). 3. Perform a simulation test. 4. Check and wiggle the harness(es), connector(s) and terminal(s). 2AZ-FE ENGINE CONTROL SYSTEM – SFI SYSTEM ES–17 ES BASIC INSPECTION When a malfunction is not confirmed by the DTC check, troubleshooting should be carried out in all circuits considered to be possible causes of the problem. In many cases, by carrying out the basic engine check shown in the following flowchart, the location of the problem can be found quickly and efficiently. Therefore, using this check is essential when engine troubleshooting. NOTICE: Conduct this check with the engine stopped and ignition switch off. Result NG OK NG OK NG OK (a) Visually check that the air filter is not excessively contaminated with dirt or oil. NG OK NG 1 CHECK BATTERY VOLTAGE Result Proceed to 11 V or more OK Below 11 V NG CHARGE OR REPLACE BATTERY 2 CHECK WHETHER ENGINE WILL CRANK PROCEED TO PROBLEM SYMPTOMS TABLE 3 CHECK WHETHER ENGINE STARTS GO TO STEP 6 4 CHECK AIR FILTER REPLACE AIR FILTER 5 CHECK IDLING SPEED TROUBLESHOOT IDLING SPEED AND PROCEED TO NEXT STEP ES–18 2AZ-FE ENGINE CONTROL SYSTEM – SFI SYSTEM ES OK NG OK NG OK 6 CHECK FUEL PRESSURE TROUBLESHOOT FUEL PRESSURE AND PROCEED TO NEXT STEP 7 CHECK FOR SPARKS TROUBLESHOOT SPARK AND PROCEED TO NEXT STEP PROCEED TO PROBLEM SYMPTOMS TABLE 2AZ-FE ENGINE CONTROL SYSTEM – SFI SYSTEM ES–19 ES REGISTRATION NOTICE: The Vehicle Identification Number (VIN) must be input into the replacement ECM. HINT: The VIN is a 17-digit alphanumeric number. The intelligent tester is required to register the VIN. 1. DESCRIPTION This registration section consists of 3 parts: Input Instructions, Read VIN and Write VIN. (a) Input Instructions: Explains the general VIN input instructions when using the intelligent tester. (b) 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. (c) 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 vehicle VIN and ECM VIN do not match, the VIN can be registered or overwritten in the ECM by following this procedure. 2. INPUT INSTRUCTIONS (a) Intelligent tester The arrow buttons (UP, DOWN, RIGHT and LEFT) and numerical buttons (0 to 9) are used to input the VIN. (b) Cursor Operation To move the cursor around the tester screen, press the RIGHT and LEFT buttons. (c) Alphabetical Character Input (1) Press the UP and DOWN buttons to select the desired alphabetical character. (2) After selection, the cursor should move. (d) Numeric Character Input (1) Press the numerical button corresponding to the number that you want to input. (2) After input, the cursor should move. HINT: Numerical characters can also be selected by using the UP and DOWN buttons. (e) Correction (1) When correcting the input character(s), put the cursor onto the character using the RIGHT and LEFT buttons. (2) Select or input the correct character using the UP/DOWN buttons, or the numerical buttons. (f) Finishing Input Operation (1) Make sure that the input VIN matches the vehicle VIN after input. (2) Press the ENTER button on the tester. ES–20 2AZ-FE ENGINE CONTROL SYSTEM – SFI SYSTEM ES 3. READ VIN (a) Confirm the vehicle VIN. (b) Connect the intelligent tester to the DLC3. (c) Turn the ignition switch to the ON position. (d) Turn the tester on. (e) Select the following menu items: DIAGNOSIS / ENHANCED OBD II/ VIN. 4. WRITE VIN (a) Confirm the vehicle VIN. (b) Connect the intelligent tester to the DLC3. (c) Turn the ignition switch to the ON position. (d) Turn the tester on. Menu Screen: Select VIN READ DTC P0630 Set VIN Previously Stored VIN Not Stored [EXIT] [EXIT] [EXIT] To Menu Screen 17-digit VIN displayed A103812E03