Noise from Injectors with Key Switch ON
注: 这种情况不能说明存在电气系统故障。 此外，这种情况也不能说明喷油器或 HEUI 燃油系统有故障。
作为冷起动策略的一部分，HEUI 燃油系统迅速驱动喷油器电磁阀，以预热喷油器中的机油。 电磁阀的迅速制动将产生发动机外部可以听到的蜂鸣噪音。 这会在点火钥匙开关处于接通位置时起动发动机之前出现。 这种情况很正常。 不存在与这种情况有关的故障诊断代码或事件。 存在这个蜂鸣噪音时将不会喷油。
如果满足下列情况，即可再现蜂鸣噪音：
- 发动机没有运行。
- 将点火钥匙开关转到接通位置。
- 进气加热器工作。
Caterpillar Information System:
3054C Industrial Engine Aftercooler Core - Clean/Test
C7 and C9 On-Highway Engines Engine/Gear Parameters
2003/02/01 Correction to Troubleshooting, RENR5910-01 , "Engine Speed/Timing Sensor" {1907, 1912}
2003/02/01 Correction to Systems Operation/Testing and Adjusting, RENR5908-01 , "Procedure for Engine Timing" {1000, 1900}
2003/01/01 227-4236 Electrical Cable is Available {4459}
2002/12/01 A New Service Manual, RENR2495, "3600 Engines PanelView Monitor" is Available {0374}
2003/01/01 New Ignition Control Groups Are Available And A New Wiring Harness Is Available To Connect The Ignition Control Group To The Display Module For The Caterpillar Ignition System (CIS) {1550}
2003/02/01 A New Spark Plug Is Available For Use In Applications That Use Bio-Gas Fuel {1555}
3126B and 3126E On-highway Engines PTO Switch ON Lamp Circuit - Test
3406E, C12, C15 and C18 Marine Engines Engine Speed/Timing Sensor - Calibrate
3056E Industrial Engine Fuel Injection Pump - Install
3056E Industrial Engine Fuel Injection Pump - Remove
3126B Truck Engine Safety Messages
3126B Truck Engine Maintenance Interval Schedule - Engines With a Shallow Oil Sump
3126B Truck Engine Maintenance Interval Schedule - Engines With a Deep Oil Sump
G3500B Engines Power Supply
C9 Urban Transit Bus Engine Cooling System - Test
C9 Urban Transit Bus Engine Water Pump - Test
3056E Industrial Engine Connecting Rod Bearings - Remove
3056E Industrial Engine Connecting Rod Bearings - Install
3406E, C12, C15 and C18 Marine Engines Engine Pressure Sensor Open or Short Circuit - Test
3056E Industrial Engine Pistons and Connecting Rods - Remove
3056E Industrial Engine Pistons and Connecting Rods - Disassemble
3056E Industrial Engine Pistons and Connecting Rods - Assemble