
ENGINE CONTROLS PART#2-发动机控制#2 ECU PROCESS and OUTPUT FUNCTIONS的鳞提 The ECU,Process Center of the Electronic Control System 电脑是电控系统的处理中心 The process and output functions of the ECU can be divided into the following six areas:电脑的处理和输出功能可分成 以下六个部分 Fuel Injection Control燃油喷射控制 ESA/VAST Spark Advance Control ESA/VAST点火提前控制 .ldle Speed Control怠速控制 Self Diagnosis自诊断 Related Engine and Emissions Control有关发动机和排放控制 .Failure Management(fail-safe and back-up) 错误管理(错误一安全和支持)
ENGINE CONTROLS PART #2 – ECU PROCESS and OUTPUT FUNCTIONS The ECU, Process Center of the Electronic Control System The process and output functions of the ECU can be divided into the following six areas: •Fuel Injection Control •ESA / VAST Spark Advance Control •Idle Speed Control •Self Diagnosis •Related Engine and Emissions Control •Failure Management (fail-safe and back-up) 发动机控制#2 电脑的处理 和输出功能 电脑是电控系统的处理中心 电脑的处理和输出功能可分成 以下六个部分 燃油喷射控制 ESA / VAST点火提前控制 怠速控制 自诊断 有关发动机和排放控制 错误管理(错误-安全和支持)

NPUT输入 PROCESS 处理 OUTPUT 输出 S0nso3传感器 ECU Actuators 执行器 电子控制单元 IGN ECU A8 8mog Self Dlegnosis nnn %2oe
输入 传感器 处理 电子控制单元 输出 执行器

ECU Power Distribution and EFI Main Relay Circuits POWER DISTRIBUTION CIRCUITS ECU的电源分配和EFI主继电器电路 BATT ECU EFI hetly 至执行器和有关的发 动机控制电路 +B To Actuators and related Engine Control Circuits +B, 自传感器 -From Sensors EO. E0
ECU Power Distribution and EFI Main Relay Circuits ECU的电源分配和EFI主继电器电路 至执行器和有关的发 动机控制电路 自传感器

ECU Power Feeds The ECU receives its ignition-switched power from the EFI main relay on all of Toyota's EFI systems.In addition to the ignition +B power feed,all P7 and TCCS ECUs have a direct battery feed,identified as BATT,supplied from either the EFI,STOP,or ECU +B fuse.The EFI main relay +B output is the power source which feeds the ECU and related engine control circuits.The direct battery feed (terminal BATT)serves to maintain voltage to the ECU keep alive memory when the ignition switch is off. Conventional EFI has no keep alive memory capabilities and,therefore,uses only an ignition switched power feed from the EFI main relay
ECU Power Feeds The ECU receives its ignition-switched power from the EFI main relay on all of Toyota's EFI systems. In addition to the ignition +B power feed, all P7 and TCCS ECUs have a direct battery feed, identified as BATT, supplied from either the EFI, STOP, or ECU +B fuse. The EFI main relay +B output is the power source which feeds the ECU and related engine control circuits. The direct battery feed (terminal BATT) serves to maintain voltage to the ECU keep alive memory when the ignition switch is off. Conventional EFI has no keep alive memory capabilities and, therefore, uses only an ignition switched power feed from the EFI main relay

电脑电源的供给 在所有丰田电子燃油喷射控制系统(EF引)中,电脑通过 点火开关由EF主继电器供电。另外还供到点火的+B端,所 有P7和TCCS的ECU由电池直接供电,视为BATT,来自于 EFL,STOP,或者ECU+B保险丝。ECU主继电器+B输出被用 做电源提供给ECU和有关的发动机控制电路。当点火开关断 开时直接的电源(BATT端子)供给用于保持ECU供电以保 证不间断存储。一般的EF引没有不间断存储功能,而是仅仅 由点火开关通过EF主继电器供电
电脑电源的供给 在所有丰田电子燃油喷射控制系统(EFI)中,电脑通过 点火开关由EFI主继电器供电。另外还供到点火的+B端,所 有P7和TCCS 的ECU由电池直接供电,视为BATT, 来自于 EFI,STOP,或者ECU+B保险丝。ECU主继电器+B输出被用 做电源提供给ECU和有关的发动机控制电路。当点火开关断 开时直接的电源(BATT端子)供给用于保持ECU供电以保 证不间断存储。一般的EFI没有不间断存储功能,而是仅仅 由点火开关通过EFI主继电器供电

Main Relay Circuits Generally speaking,the EFI Main Relay supplies current to the following major circuits: .ECU +B and +B1 .Injectors(dual relay or dual contact relay only) .Circuit opening relay(power contact and pull-in windings) .Air flow meter VB circuit(when so equipped) .Output Actuator Vacuum Switching Valves (VSV) Fuel Pressure Up(FPU) Exhaust Gas Recirculation(EGR) -Throttle Opener .ISC motor/solenoid windings .Check connector +B terminal
Main Relay Circuits Generally speaking, the EFI Main Relay supplies current to the following major circuits: •ECU +B and +B1 •Injectors (dual relay or dual contact relay only) •Circuit opening relay (power contact and pull-in windings) •Air flow meter VB circuit (when so equipped) •Output Actuator Vacuum Switching Valves (VSV) - Fuel Pressure Up (FPU) - Exhaust Gas Recirculation (EGR) - Throttle Opener •ISC motor/solenoid windings •Check connector +B terminal

主继电器电路 总的来说,EF主继电器的电流供给到以下主要电路: ECU的+B和B1端 喷油器(双重继电器或双触点继电器) 电路断开继电器(功率触点和吸合线圈) 空气流量计VB电路(装备车上) 输出执行器真空开关阀(VSV) 燃油增压(FPU) 废气再循环装置(EGR) 节气门强制开启装置 ISC马达/电磁线圈 检测连接器的+B端子
主继电器电路 总的来说,EFI主继电器的电流供给到以下主要电路: ECU的+B和B1端 喷油器(双重继电器或双触点继电器) 电路断开继电器(功率触点和吸合线圈) 空气流量计VB电路(装备车上) 输出执行器真空开关阀(VSV) 燃油增压(FPU) 废气再循环装置 (EGR) 节气门强制开启装置 ISC马达/电磁线圈 检测连接器的+B端子

DUAL CONTACT,IGNITION CONTROLLED 双重触点,传统 CONVENTIONAL EFI(4M-E) 的EFI(4M-E) 点火控制电路 use Links(BATT) (gn.) ECU +B B+ Circuht Service Connector 检修连接器 至喷油器 电路开启继电器 To Injector Resistor 至点火线圈 To Ignition Colh
双重触点,传统 的EFI(4M-E) 点火控制电路 电路开启继电器 检修连接器 至喷油器 至点火线圈

Dual Contact EFI MAIN RELAY SINGLE CONTACT,IGNITION CONTROLLED (Single Relay): Ignition Switch EF主继电器单一触点, 自自: 点火控制 Controlled BATT 点火开关控制的 双重触点(单向 ECU 继电器) +B1 To ISC To VSVs To Air Flow Sensor Ve (Some Models) To Check Connector +B ay
Dual Contact (Single Relay), Ignition Switch Controlled 点火开关控制的 双重触点(单向 继电器) EFI主继电器单一触点, 点火控制

IGN 1G2 Single Contact, IG SW Ignition Switch MREL Controlled 单触点,点火开关 BATT 控制 EFI Main Relay ECU +B +B1 EFI MAIN RELAY To ISC SINGLE CONTACT,ECU CONTROLLED To VSVs To Check Connector +B 主继电器单触点ECU控制 To Circuit 去电路开启继电器 Opening Relay-
Single Contact, Ignition Switch Controlled 单触点,点火开关 控制 主继电器 单触点ECU控制 去电路开启继电器