汽 车 专 业 英 语 Special English for Automobile

Section B Service and Repair Manual 汽 车 维 修 手 册 5.PROBLEM SYMPTOMS TABLE 故障症状表 Symptom 症状 Suspect Area 可能范围 See page 参见页数 Immobiliser is not set. (Engine starts with key codes other than the registered key code.) 停机系统不能设定（发动机以未注册的钥匙代码起动） Engine and ECT ECU 发动机和ECT ECU IN-35

Symptom Suspect Area See page Engine does not start 1.Key 2.Wire harness 3.Transponder key coil 4.Amplifier 5 Engine and ECT ECU *1 IN-35 BE-174 - IN-35 症状 可能范围 参见页数 发动机 不能 起动 1.钥匙 2.线束 3.无线收发钥匙线圈 4.放大器 5.发动机和ECT ECU *1 IN-35 BE-174 - IN-35

*1 Check if the key which did not start the engine has been registered and if it is possible to start with other already registered key. *1 检查不能起动发动机的钥匙是否已进行注册以及发动机能否用其它已注册的钥匙起动。

IN-35 BE-174 - Symptom Suspect Area See page Security indicator is always On. (Although code has been registered in the automatic registration mode, indicator is not OFF) 1.Wire harness 2.Transponder key coil 3.Amplifier 4. Engine and ECT ECU IN-35 BE-174 - 症状 可能范围 参见页数 发安全指示灯一直亮（虽然代码已用自动注册模式注册，但指示灯不熄灭） 1. 线束 2.无线收发钥匙线圈 3.放大器 4.发动机和ECT ECU IN-35 BE-174 -

发安全指示灯不亮（输出停机系统的DTC时） 1. 线束 2.无线收发钥匙线圈 3.放大器 4.发动机和ECT ECU IN-35 Symptom Suspect Area See page Security indicator is OFF (When DTC of immobiliser is not output) 1.Wire harness 2.Transponder key coil 3.Amplifier 4. Engine and ECT ECU IN-35 BE-174 - 症状 可能范围 参见页数 发安全指示灯不亮（输出停机系统的DTC时） 1. 线束 2.无线收发钥匙线圈 3.放大器 4.发动机和ECT ECU IN-35 BE-174 -

6.CIRCUIT INSPECTION 电路检查 DTC B2785 IG Switch ON Malfunction B2786 IG Switch OFF Malfunction DTC B2785 点火开关接通故障。 B2786 点火开关关闭故障。

CIRCUIT DESCRIPTION 电路说明 DTC No. DTC Detecting Condition Trouble Area 1.Short circuit in IG switch circuit 2.IG switch adheres to ON position 1.IG switch 2.EFI Main Relay 3.Wire harness B2786 1.Open circuit in IG switch circuit 2.IG switch adheres to OFF position DTC 编号 DTC 检测条件 故障范围 B2785 1.点火开关电路短路 2.点火开关保持在ON位置 1.点火开关 2.EFI主继电器 3.线束 B2786 1.点火开关电路开路 2.点火开关保持在OFF位置

电路图 WIRING DIAGRAM

DTC B2791 Key Unlock Warning SW OFF Malfunction DTC B2791 钥匙未拔下警告开关关闭故障

DTC No DTC Detecting Condition Trouble Area B2791 1.Open circuit in key unlock warning switch circuit. 2.Key unlock warning switch adheres to OFF position. 1.Key unlock warning switch. 2.Wire harness. DTC 编号 DTC 检测条件 故障范围 B2791 1.钥匙未拔下警告开关电路开路。 3.钥匙未拔下警告开关保持在关闭位置。 1.钥匙未拔下警告开关。 2.线束。

WIRING DIAGRAM 电路图

INSPECTION PROCEDURE

检查步骤

DTC B2795 Unmatched Key Code DTC B2795 钥匙代码不匹配 This DTC is output when an unregistered key is inserted. When this DTC is output, detect DTC and insert the key that a customer keeps to check that B2795 is output. 插入未注册的钥匙时会输出该DTC。当输出了这个DTC时，检测DTC并插入客户持有的钥匙以检查是否输出B2795故障码。

When a key that outputs B2795 is found, register this key When a key that outputs B2795 is found, register this key. When B2795 is not output, there is a possibility that the unregistered key has been inserted before. (Engine and ECT ECU is normal.) 如果发现使用这把钥匙会输出B2795故障码，注册这把钥匙。如果没有输出B2795故障码，则有可能在这之前曾有未注册的钥匙插入过（发动机和ECT ECU正常）

Inquire a customer the condition of using the system to find the cause of the trouble. (Example: Another key has been inserted, etc.) 询问客户使用该系统的情况以找出故障原因。 （例如：插入过其它钥匙等等。）

DTC B2797 Malfunction No. DTC B2797 一号故障 CIRCUIT DESCRIPTION 电路说明 This code is detected when although the communication has been performed normally, an error occurs. (Example: Some noise is included in communication line. ) 即使通信正常，但只要发生错误仍能检测到该故障码。（例如：在通信线路中含有一些杂波。）

DTC No DTC Detecting Condition Trouble Area B2797 Communication error 1.Wire harness. 2.Transponder Key Amplifier 3.Engine and ECT ECU DTC 编号 DTC 检测条件 故障范围 B2797 通信错误 1.线束 2.无线收发钥匙放大器 3.发动机和ECT ECU

INSPECTION PROCEDURE 检查步骤 1 Noise check 1 杂波检查 PREPARATION： Insert the already registered master key in the key cylinder. 准备： 将已注册的主钥匙插入钥匙孔。

CHECK： Using an oscilloscope or TOYATA hand-tester, check that noise is included in the signals sent to the CODE terminal of ENGINE and ECT ECU. 检查： 使用示波器或丰田手持测试仪检查到发动机和ECT ECU上CODE端子中的信号里是否含有杂波。 OK： No noise is detected. 正常： 检测不到杂波。

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