810742 Mercury JET, (.044), PROGRESSION AIR

Table 1
Diagnostic Trouble Codes for the 5 VDC Sensor Supply Circuit    
CDL Code    Description    Notes    
262-3     5 Volt Sensor DC Power Supply : 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 Engine System Indicator lamp will come on. The ECM sets all of the sensors on the 5 VDC circuit to the default values.
The engine will be derated.    
2131-3     5 Volt Sensor DC Power Supply #2 : Voltage Above Normal    
262-4     5 Volt Sensor DC Power Supply : 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 Engine System Indicator lamp will come on. The ECM sets all of the sensors on the 5 VDC circuit to the default values.
The engine will be derated.    
2131-4     5 Volt Sensor DC Power Supply #2 : Voltage Below Normal    
100-21     Engine Oil Pressure Sensor : Data Drifted Low     The ECM detects no 5 VDC supply to the engine oil pressure sensor.    
274-21     Atmospheric Pressure Sensor : Data Drifted Low     The ECM detects no 5 VDC supply to the barometric pressure sensor.    
3385-21     EGR Intake Pressure Sensor : Data Drifted Low     The ECM detects no 5 VDC supply to the Nox Reduction System (NRS) inlet pressure sensor.    
1785-21     Intake Manifold Pressure Sensor : Data Drifted Low     The ECM detects no 5 VDC supply to the intake manifold pressure sensor.    
3464-21     DPF #1 Intake Pressure Sensor : Data Drifted Low     The ECM detects no 5 VDC supply to the Diesel Particulate Filter (DPF) inlet pressure sensor.    
3493-21     Aftertreatment #1 Secondary Air Pressure Sensor : Data Drifted Low     The ECM detects no 5 VDC supply to the Aftertreatment Regeneration Device (ARD) air pressure sensor.    Note: A 262-XX diagnostic code indicates a fault in the 5 VDC circuit on the J2/P2 connector. A 2131-XX diagnostic code indicates a fault in the 5 VDC circuit on the J1/P1 connector.The following background information is related to this procedure:The ECM supplies regulated +5 VDC to the following sensors on P2:46:
The position sensor for the intake throttle valve
The position sensor for the NRS Valve
Engine oil pressure sensorThe ECM supplies regulated +5 VDC to the following sensors on P2:47:
The NRS inlet pressure sensor
The NRS differential pressure sensor
Fuel rail pressure sensor
Barometric pressure sensor
Intake manifold pressure sensorThe ECM supplies regulated +5 VDC to the following components on P2:45:
The position sensor for the combustion air valve
ARD pilot fuel pressure sensor
ARD air pressure sensor
The DPF inlet pressure sensor
The DPF differential pressure sensor
The inlet temperature sensor for the DPF and the ARD flame detection temperature sensor
The aftertreatment identification moduleA diagnostic code can be caused by the following conditions:
A short circuit in the harness
A short circuit to a voltage that is higher than 5.16 VDC
A faulty sensor
A faulty ECM
An open circuit in the harness
Illustration 1 g02447500
Typical example of the schematic for the 5 VDC supply from P2:46
Illustration 2 g02447501
Typical example of the schematic for the 5 VDC supply on P2:47
Illustration 3 g02447644
Typical example of the schematic for the sensors on the 5 VDC supply for the Clean Emissions Module (CEM)
Illustration 4 g02157933
Typical example of the schematic for the inlet temperature sensor for the DPF and the ARD flame detection temperature sensor
Illustration 5 g02315513
Typical example of the fuel rail pressure sensor (1) Sensor ground (3) 5 VDC supplyNote: The position of the terminal for the voltage supply on the fuel rail pressure sensor is different to all other engine pressure sensors.
Illustration 6 g02315514
Typical example of an engine pressure sensor (1) 5 VDC supply (2) Sensor ground
Illustration 7 g02448097
Typical example of the connector for the intake throttle valve (3) Sensor ground (5) 5 VDC supply
Illustration 8 g02315534
Typical example of the connector for the NRS valve (1) 5 VDC supply (2) Sensor ground