CYLINDER A 2V5286 - Caterpillar

This procedure covers the following diagnostic codes:
Table 1
Diagnostic Trouble Codes for Sensor Supplies
J1939 Code CDL Code Code Description
(code descriptions may vary) Comments
678-3 41-3 ECU 8 Volts DC Supply : Voltage Above Normal The ECM detects the following conditions:
The 8 VDC supply is more than 8.8 VDC for more than one second.
The ECM has been powered for more than 3 seconds.
Diagnostic code 168-4 is not active.
The ECM will log the diagnostic code and the warning lamp will illuminate when this diagnostic code is active.
The engine may be limited to low idle.
678-4 41-4 ECU 8 Volts DC Supply : Voltage Below Normal The ECM detects the following conditions:
The 8 VDC supply is less than 7.2 VDC for more than one second.
The ECM has been powered for more than 3 seconds.
Diagnostic code 168-4 is not active.
The ECM will log the diagnostic code and the warning lamp will illuminate when this diagnostic code is active.
The engine may be limited to low idle.
An active diagnostic code may not cause any noticeable effect on engine response unless the voltage drops below 6.5 VDC.
3509-3 262-3 Sensor Supply Voltage 1 : Voltage Above Normal The Electronic Control Module (ECM) detects the following conditions:
The 5 VDC supply for the sensors is greater than 5.16 VDC for more than one second.
The ECM has been powered for at least 3 seconds.
Diagnostic code 168-4 is not active.
The warning lamp will come on. The ECM sets all the sensors on the 5 VDC circuit to the default values.
The engine will be derated.
3510-3 2131-3 Sensor Supply Voltage 2 : Voltage Above Normal
3509-4 262-4 Sensor Supply Voltage 1 : Voltage Below Normal The ECM detects the following conditions:
The 5 VDC supply for the sensors is less than 4.84 VDC for more than one second.
The ECM has been powered for at least 3 seconds.
Diagnostic code 168-4 is not active.
The warning lamp will come on. The ECM sets all the sensors on the 5 VDC circuit to the default values.
The engine will be derated.
3510-4 2131-4 Sensor Supply Voltage 2 : Voltage Below Normal
100-21 100-21 Engine Oil Pressure : Data Drifted Low The ECM detects no 5 VDC supply to the engine oil pressure sensor.
108-21 3528-21 Barometric Pressure : Data Drifted Low The ECM detects no 5 VDC supply to the barometric pressure sensor.
3358-21 3385-21 Engine Exhaust Gas Recirculation Inlet Pressure : Data Drifted Low The ECM detects no 5 VDC supply to the Nox Reduction System (NRS) inlet pressure sensor.
3563-21 1785-21 Engine Intake Manifold #1 Absolute Pressure : Data Drifted Low The ECM detects no 5 VDC supply to the intake manifold pressure sensor.
5019-21 3511-21 Engine Exhaust Gas Recirculation Outlet Pressure : Data Drifted Low The ECM detects no 5 VDC supply to the NRS outlet pressure sensor. Note: A 678-XX diagnostic code indicates a fault in the 8 VDC circuit on the J1/P1 connector. A 3509-XX diagnostic code indicates a fault in the 5 VDC circuit on the J2/P2 connector. A 3510-XX diagnostic code indicates a fault in the 5 VDC circuit on the