WASHER 1K7076 - Caterpillar

Use this procedure to troubleshoot the electrical system if a problem is suspected with a sensor supply. Use this procedure if any one of the diagnostic codes in Table 1 is active or easily repeated.Note: Some of the following codes may not be applicable for certain applications.
Table 1
Diagnostic Codes Table    
J1939 Code     CDL Code     Code Description     Comments    
108-21     3528-21     Atmospheric Pressure Sensor : Data Drifted Low     The code is logged.
The 5 VDC supply to the sensor has been lost.    
678-3     41-3     8 VDC Supply : Voltage Above Normal     The code is logged.    
678-4     41-4     8 VDC Supply : Voltage Below Normal     The code is logged.    
3358-21     3385-21     EGR Intake Pressure Sensor : Data Drifted Low     The code is logged.
The 5 VDC supply to the sensor has been lost.    
3509-3     262-3     5 Volt Sensor DC Power Supply : Voltage Above Normal     The code is logged.
All sensors are set to default values.    
3509-4     262-4     5 Volt Sensor DC Power Supply : Voltage Below Normal     The code is logged.
All sensors are set to default values.    
3510-3     2131-3     5 v Sensor DC Power Supply #2 : Voltage Above Normal     The code is logged.
Engine power may be derated.    
3510-4     2131-4     5 v Sensor DC Power Supply #2 : Voltage Below Normal     The code is logged.
Engine power may be derated.    
3563-21     1785-21     Intake Manifold Pressure Sensor : Data Drifted Low     The code is logged.
The 5 VDC supply to the sensor has been lost.    
3609-21     3464-21     DPF #1 Intake Pressure Sensor : Data Drifted Low     The code is logged.
The 5 VDC supply to the sensor has been lost.    
3837-21     3493-21     Aftertreatment #1 Secondary Air Pressure Sensor : Data Drifted Low     The code is logged.
The 5 VDC supply to the sensor has been lost.    
5578-21     289-21     Fuel Pressure Sensor - Before Fuel Filter : Data Drifted Low     The code is logged.
The 5 VDC supply to the sensor has been lost.    
5580-21     460-21     Fuel Pressure Sensor - After Fuel Filter : Data Drifted Low     The code is logged.
The 5 VDC supply to the sensor has been lost.    System OperationThe Electronic Control Module (ECM) supplies a regulated voltage of 5.0 0.2 VDC to the sensors.The supply voltage for the sensors is routed from the ECM to terminal 1 of each sensor connector. The sensor return for the sensors is routed from the ECM to terminal 2 of each sensor connector. The ECM provides short circuit protection for the internal power supply. A short circuit to the battery will not damage the internal power supply.Note: The sensors are not protected from overvoltage. A short from the supply line to the +Battery may damage the sensors. If any of the diagnostic codes