Diagnosis Technician >> Gasoline Engine >> Ignition System Ignition System Description 1.Powerful sparks/ 2.Proper ignition timing/ 3.Sufficient durability (1/2) Diagnosis Technician >> Gasoline Engine >> Ignition System Ignition System Description Ignition switch lgniter Primary coil Ignition coil (with igniter) Secondary coil Sensors Spark plug : Primary circuit : Secondary circuit (2/2) Diagnosis Technician >> Gasoline Engine >> Ignition System Ignition System Changes in Ignition Systems 1.Breaker points type High-tension cord High-tension cord Ignition switch ST Distributor IG Governor advancer Capasitor Ignition coil Cam Resistor Spark plug Breaker points Vacuum advancer (1/4) Diagnosis Technician >> Gasoline Engine >> Ignition System Ignition System Changes in Ignition Systems 2.Transistorized type High-tension cord High-tension cord Ignition switch Distributor Governor advancer Igniter Transistor Spark plug Ignition coil Signal generator Vacuum advancer (2/4) Diagnosis Technician >> Gasoline Engine >> Ignition System Ignition System Changes in Ignition Systems 3.Transistorized type with ESA (Electronic Spark Advance) High-tension cord High-tension cord Ignition switch Distributor Igniter ECU Ignition coil Transistor Spark plug Sensors (3/4) Diagnosis Technician >> Gasoline Engine >> Ignition System Ignition System Changes in Ignition Systems 4.DIS (Direct Ignition System) Type1 Type2 Sensors Sensors ECU IGT1 IGT2 ECU IGT3 IGT2 IGT1 IGT4 Igniter Igniter High-tension code Ignition coil (with igniter) Spark plug Ignition coil Spark plug Ignition coil (4/4) Diagnosis Technician >> Gasoline Engine >> Ignition System Ignition System Necessity of Ignition Timing Control Ignition timing TDC ATDC10° ECU Rotational direction of crankshaft (1/3) Diagnosis Technician >> Gasoline Engine >> Ignition System Ignition System Necessity of Ignition Timing Control MPa ATDC10° C TDC B A BTDC ATDC (1/3) Diagnosis Technician >> Gasoline Engine >> Ignition System Ignition System Necessity of Ignition Timing Control ATDC10° C TDC D MPa ECU B A BTDC ATDC (1/3) Diagnosis Technician >> Gasoline Engine >> Ignition System Ignition System Necessity of Ignition Timing Control •Ignition timing control TDC BDC (2/3) Diagnosis Technician >> Gasoline Engine >> Ignition System Spark Plug 1.Platinum-tipped spark plug/ 2.Iridium-tipped spark plug Platinum/Iridium-tipped Plug Conventional plug Platinum-tipped plug Platinumtipped Iridium-tipped plug Iridiumtipped Platinumtipped (1/2) Diagnosis Technician >> Gasoline Engine >> Ignition System Spark Plug Platinum/Iridium-tipped Plug (2/2) Diagnosis Technician >> Gasoline Engine >> Ignition System TDI (TOYOTA Direct Ignition System) Description Conventional type Ignition coil Igniter ECU Distributor DIS type ECU Ignition coil with igniter Camshaft position sensor Spark plug Crankshaft position sensor (1/2) Diagnosis Technician >> Gasoline Engine >> Ignition System TDI (TOYOTA Direct Ignition System) Ignition timing (timing advance) Description High Engine speed Amount of intake air (Engine load) High ESA map (1/1) Diagnosis Technician >> Gasoline Engine >> Ignition System TDI (TOYOTA Direct Ignition System) 1.Crankshaft position sensor (NE)/ 2.Camshaft position sensor (G)/ 3.Knock sensor (KNK)/ 4.Throttle position sensor (VTA)/ 5.Air flow meter (VG/PIM)/ 6.Water temperature sensor (THW)/ 7.Ignition coil with igniter/ 8.Engine ECU/ 9.Spark plug Components ECU Throttle position sensor Air flow meter Ignition coil with igniter Spark plug Camshaft position sensor Knock sensor Water temp sensor Crankshaft position sensor (1/2) Diagnosis Technician >> Gasoline Engine >> Ignition System TDI (TOYOTA Direct Ignition System) Components 1.Crankshaft position sensor (NE)/ 2.Camshaft Ignition coil with igniter Engine ECU position 6.Water temp sensor (G)/ sensor 3.Knock Spark plug sensor (KNK)/ 1.Crankshaft 4.Throttle position position sensor sensor (VTA)/ 5.Air flow meter (VG/PIM)/ 6.Water temperature sensor (THW)/ 7.Ignition coil with igniter/ 8.Engine ECU/ 9.Spark plug Air flow meter Knock sensor Camshaft position sensor Throttle position sensor (1/2) Diagnosis Technician >> Gasoline Engine >> Ignition System TDI (TOYOTA Direct Ignition System) Components 1.Ignition coil united with igniter Igniter Primary coil Secondary coil Core Plug cap (2/2) Diagnosis Technician >> Gasoline Engine >> Ignition System TDI (TOYOTA Direct Ignition System) Operation +B Crankshaft position sensor IGT1 Camshaft position sensor Spark plug #1 IGT2 Knock sensor Spark plug #2 ECU Throttle position sensor IGT3 Spark plug #3 Airflow meter IGT4 Water temperature sensor IGF Spark plug #4 (1/1) Diagnosis Technician >> Gasoline Engine >> Ignition System Operation Principle of the Transistorized Type Reference Ignition coil Igniter Distributor Spark plug Signal generator (1/1) Diagnosis Technician >> Gasoline Engine >> Ignition System Operation Principle of the Transistorized Type Reference Governor weight Driving plate Governor plate Governor spring Distributor shaft Advance (1/1) Diagnosis Technician >> Gasoline Engine >> Ignition System Operation Principle of the Transistorized Type Reference Signal generator Braker plate Diaphragm Advance rod Advance Diaphragm spring Advance angle (1/1) Diagnosis Technician >> Gasoline Engine >> Ignition System Operation Principle of the Transistorized Type with ESA Reference Ignition coil IGT Igniter IGF Distributor ECU Spark plug Sensor (1/1) Diagnosis Technician >> Gasoline Engine >> Ignition System Inspection Inspection 1.Check initial timing DLC3 DLC1 TC TE1 16 15 14 13 12 11 10 CG E1 (1/3) Diagnosis Technician >> Gasoline Engine >> Ignition System Inspection Inspection 2.Check spark plug Normal Carbon fouling Oil fouling Overheating (2/3) Diagnosis Technician >> Gasoline Engine >> Ignition System Inspection Inspection 3.Spark test Ignition switch START Engine (3/3) ... (3/4) Diagnosis Technician >> Gasoline Engine >> Ignition System Ignition System Changes in Ignition Systems 4.DIS (Direct Ignition System) Type1 Type2 Sensors Sensors ECU IGT1 IGT2 ECU IGT3... >> Ignition System Ignition System Necessity of Ignition Timing Control •Ignition timing control TDC BDC (2/3) Diagnosis Technician >> Gasoline Engine >> Ignition System Ignition System Necessity... Vacuum advancer (2/4) Diagnosis Technician >> Gasoline Engine >> Ignition System Ignition System Changes in Ignition Systems 3.Transistorized type with ESA (Electronic Spark Advance) High-tension