MANIFOLD ASSEM. 3P4863 - Caterpillar

Use this procedure to troubleshoot the electrical system if a problem is suspected with a sensor supply. Also, use this procedure if one of the following diagnostic codes is active or easily repeated.
Table 1
J1939 Code and Description CDL Code and Description Comments
100-21
Engine Oil Pressure : Data Drifted Low 100-21
Engine Oil Pressure Sensor : Data Drifted Low The code is logged.
678-3
ECU 8 Volt DC Supply : Voltage Above Normal 41-3
8 Volt DC Supply : Voltage Above Normal The code is logged.
678-4
ECU 8 Volt DC Supply : Voltage Below Normal 41-4
8 Volt DC Supply : Voltage Below Normal The code is logged.
1208-21
Engine Pre-filter Oil Pressure : Data Drifted Low 542-21
Engine Oil Pressure Sensor - Before Oil Filter : Data Drifted Low The code is logged.
3509-3
Sensor Supply Voltage 1 : Voltage Above Normal 262-3
5 V Sensor DC Power Supply : Voltage Above Normal All sensors are set to default values.
The code is logged.
3509-4
Sensor Supply Voltage 1 : Voltage Below Normal 262-4
5 V Sensor DC Power Supply : Voltage Below Normal All sensors are set to default values.
The code is logged.
3510-3
or Supply Voltage 2 : Voltage Above Normal 2131-3
5 V Sensor DC Power Supply #2 : Voltage Above Normal Engine power may be derated.
The code is logged.
3510-4
Sensor Supply Voltage 2 : Voltage Below Normal 2131-4
5 V Sensor DC Power Supply #2 : Voltage Below Normal Engine power may be derated.
The code is logged.
3563-21
Engine Intake Manifold #1 Absolute Pressure : Data Drifted Low 1785-21
Intake Manifold Pressure Sensor : Data Drifted Low The 5 VDC supply to the sensor has been lost.
The code is logged.
5578-21
Engine Fuel Delivery Absolute Pressure : Data Drifted Low 289-21
Fuel Pressure Sensor - Before Fuel Filter : Data Drifted Low The 5 VDC supply to the sensor has been lost.
The code is logged.
5580-21
Engine Filtered Fuel Delivery Absolute Pressure : Data Drifted Low 460-21
Fuel Pressure Sensor - After Fuel Filter : Data Drifted Low The 5 VDC supply to the sensor has been lost.
The code is logged. The 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 are active, a sensor may have been damaged. Repair the sensor supply and check for any active sensor diagnostic codes to determine if a sensor has been damaged.
Table 2
Sensor Supply Sensor Supply ECM Location
Sensor Supply #1 Sensors on A5:E4 engine ECM J2 connector or A5:E2 aftertreatment controller J2 connector
Sensor Supply #2 Sensors on A5:E4 engine ECM J1 connector
Illustration 1 g06323434
Schematic for the primary analog sensors that are shown in the right side engine