C13, C15, and C18 Engines for Caterpillar Built Machines Caterpillar


Cooling Fan - Calibrate

Usage:

745 3F6
如果表 1 中的诊断代码激活,采用此步骤。

表 1
故障诊断代码    
CDL 代码     J1939 代码     代码说明
(代码说明可能不同)    
注释    
1551-13         发动机所需风扇系统:需要标定     将会记录该代码。    

ECM(Electronic Control Module,电子控制模块)向发动机风扇控制电磁阀供应电流。 发动机风扇控制电磁阀使机油旁通过风扇泵,从而控制风扇泵的压力。 风扇泵驱动风扇。 为了确保精确控制,ECM 必须确定到发动机风扇控制电磁阀的电流和实际风扇转速间的相互关系。 Caterpillar 电子技师(ET)允许用户根据已知风扇转速手动标定电流。

注: ECM 将在初始标定时采用正常电流驱动发动机风扇控制电磁阀。 ECM 将最后一个标定值作为以后标定的起始点。

  1. 选择"Service(维修)" 标签并选择 "Calibrations(标定)"。 开始进行"Fan Calibration(风扇标定)"。

  1. 满足需要的条件以继续进行标定。 遵照 Cat ET 提供的说明。 继续按 "Next(下一步)"按钮。

  1. 利用以下维修工具和软件许可, NETG5044 测量实际风扇转速:

    • 348-5430 多用工具总成

    • 308-7264 多用转速表工具总成 ()

    1. 如果实际风扇转速与 Cat ET 上显示的风扇转速相符,按 "Next(下一步)"按钮。

    1. 实际风扇转速可能与 Cat ET 上的风扇转速不匹配。 随后必须通过增减电流来改变风扇转速。

  1. 当实际风扇转速与 Cat ET 上显示的风扇转速相符时,标定完成。 遵照 Cat ET 提供的说明。

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