GUIDE-OUTER 9T7769 - Caterpillar

System Operation Description: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
CDL Code J1939 Code Code Description Comments
41-3 678-3 8 VDC Supply : Voltage Above Normal The code is logged.
41-4 678-4 8 VDC Supply : Voltage Below Normal The code is logged.
262-3 3509-3 5 Volt Sensor DC Power Supply : Voltage Above Normal The code is logged.
All sensors are set to default values.
262-4 3509-4 5 Volt Sensor DC Power Supply : Voltage Below Normal The code is logged.
All sensors are set to default values.
274-21 108-21 Atmospheric Pressure Sensor : Data Drifted Low The code is logged.
The 5 VDC supply to the sensor has been lost.
289-21 5578-21 Fuel Pressure Sensor - Before Fuel Filter : Data Drifted Low The code is logged.
The 5 VDC supply to the sensor has been lost.
460-21 5580-21 Fuel Pressure Sensor - After Fuel Filter : Data Drifted Low The code is logged.
The 5 VDC supply to the sensor has been lost.
1785-21 3563-21 Intake Manifold Pressure Sensor : Data Drifted Low The code is logged.
The 5 VDC supply to the sensor has been lost.
2131-3 3510-3 5 v Sensor DC Power Supply #2 : Voltage Above Normal The code is logged.
Engine power may be derated.
2131-4 3510-4 5 v Sensor DC Power Supply #2 : Voltage Below Normal The code is logged.
Engine power may be derated.
3385-21 3358-21 EGR Intake Pressure Sensor : Data Drifted Low The code is logged.
The 5 VDC supply to the sensor has been lost.
3464-21 3609-21 DPF #1 Intake Pressure Sensor : Data Drifted Low The code is logged.
The 5 VDC supply to the sensor has been lost.