6 2TR-FE ENGINE CONTROL SYSTEM SFI SYSTEM SYSTEM DIGRM 1. SYSTEM DIGRM ECM C/OPN Relay TT + FC M Fuel Pump Ignition Switch MREL EFI Relay Starter #10 Injector Starter Relay ST #20 Injector Ignition Switch Ignition Switch Park/Neutral Switch NSW #30 Injector IGSW #40 Injector Stop Light Switch ST1- Stop Light STP IRP IRV IDI ir Injection Control Driver M TT +M C 121730E01
2TR-FE ENGINE CONTROL SYSTEM SFI SYSTEM 7 C Crankshaft Position NE+ C1 CT /C mplifier Camshaft Position G2+ NE- THWO Combination Meter Input Speed NCO- NCO+ PRG Purge VSV Output Speed SP2- SP2+ Heated Oxygen sensor E2G HT1 Mass ir Flow Meter VG OX1 attery C 121731E01
8 2TR-FE ENGINE CONTROL SYSTEM SFI SYSTEM C VC ir-fuel Ratio Throttle Position VT1 VT2 H1 1+ TT Engine Coolant Temperature THW 1- /F Heater Relay Intake ir Temperature TH W MIL Ignition Switch No.1 /T Oil Temperature THOC PI Cruise Indicator Ignition Coil with Igniter No.2 /T Oil Temperature THO1 IGT1 #1 E2 VC Pressure IGT2 #2 IP VCP2 IGT3 #3 VP2 ccelerator Pedal Position EP2 VCP VP IGT4 #4 EP IGF1 121732E01
2TR-FE ENGINE CONTROL SYSTEM SFI SYSTEM 9 CCS TCH Combination Meter (Tacho) Cruise Control Switch IMO Transponder Key ECU Knock KNK1 IMI EKNK 4WD Indicator LT Generator 4WD Control Switch 4WD PS Pressure Switch PSW Canister Pump Module irbag ECU F/PS VPMP Vent Valve Combination Meter SPD MPMP Leak Detection Pump Tail Light Relay ELS1 PPMP Canister Pressure Inverter Relay ELS2 D 121733E01
10 2TR-FE ENGINE CONTROL SYSTEM SFI SYSTEM D VSC ECU us CNH CNL OC1+ OC1- Oil Control Valve Shift Solenoid Valve SLU TCH DLC3 TC SLU+ SLU- SLT+ Shift Solenoid Valve SLT SLT- Shift Solenoid Valve S1 Clutch Start Switch (for M/T) S1 Ignition Switch S2 Shift Solenoid Valve S2 + D R M+ M- M Throttle ctuator 3 2 GE01 L ME01 Shift Position Switch (Park/Neutral Position Switch) E01 E02 E0M E03 E1 E04 EC 121734E01
2TR-FE ENGINE CONTROL SYSTEM SFI SYSTEM 11 2. COMMUNICTION WITH OTHER COMPUTERS DLC3 ECM CN Communication Line Skid Control ECU Yaw Rate Steering Refer to CN COMMUNICTION SYSTEM (See page C-4). 3. COMMUNICTION SIGNLS Transmitter Receiver Signal Communication Line ECM Skid Control ECU Skid Control ECU ECM Intake air temperature signal Check mode signal Engine rpm signal Throttle position signal Cruise control operation signal VSC prohibition requirement signal Shift position signal Destination signal Engine system malfunction signal Ignition timing signal VSC/TRC operation signal VSC/TRC system malfunction signal Fuel cut requirement signal Cruise control cancel requirement signal Torque requirement signal CN CN G037114E01 Refer to CN COMMUNICTION SYSTEM (See page C-4).
12 2TR-FE ENGINE CONTROL SYSTEM SFI SYSTEM HOW TO PROCEED WITH TROULHOOTING *: Use the intelligent tester. 1 VEHICLE ROUGHT TO WORKSHOP 2 CUSTOMER PROLEM NLYSIS 3 CONNECT INTELLIGENT TTER TO DLC3* If the display indicates a communication fault in the tester, inspect the DLC3. 4 CHECK DTC ND FREEZE FRME DT* Record or print DTCs (See page -40) and freeze frame data (See page -41), if necessary. 5 CLER DTC ND FREEZE FRME DT* Refer to DTC Check / Clear (See page -40). 6 CONDUCT VISUL INSPECTION 7 SET CHECK MODE DIGNOSIS* Refer to Check Mode Procedure (See page -43).
2TR-FE ENGINE CONTROL SYSTEM SFI SYSTEM 13 8 CONFIRM PROLEM SYMPTOMS If the engine does not start, perform steps 10 and 12 first. Result Malfunction does not occur Malfunction occurs Proceed To GO TO STEP 10 9 SIMULTE SYMPTOMS 10 CHECK DTC* Refer to DTC Check / Clear (See page -40). Result Malfunction code No code Proceed To GO TO STEP 12 11 REFER TO DTC CHRT Refer to Diagnostic Trouble Code Chart (See page -54). GO TO STEP 14 12 CONDUCT SIC INSPECTION Refer to asic Inspection (See page -14). Result Malfunctioning parts not confirmed Malfunctioning parts confirmed Proceed To GO TO STEP 17
14 2TR-FE ENGINE CONTROL SYSTEM SFI SYSTEM 13 REFER TO PROLEM SYMPTOMS TLE Refer to Problem Symptoms Table (See page -29). Result Malfunctioning circuit confirmed Malfunctioning parts confirmed Proceed To GO TO STEP 17 14 CHECK ECM POWER SOURCE CIRCUIT Refer to ECM Power Source Circuit (See page -425). 15 CONDUCT CIRCUIT INSPECTION Result Malfunction not confirmed Malfunction confirmed Proceed To GO TO STEP 18 16 CHECK FOR INTERMITTENT PROLEMS Refer to Check for Intermittent Problems (See page -14). GO TO STEP 18 17 CONDUCT PRTS INSPECTION
2TR-FE ENGINE CONTROL SYSTEM SFI SYSTEM 15 18 IDENTIFY PROLEM 19 DJUST ND/OR REPIR 20 CONDUCT CONFIRMTION TT END