879148T36 Mercruiser PUMP, 12 Volt

Table 1
J1939 Code and Description CDL Code and Description Comments
100-3
Engine Oil Pressure Sensor : Voltage Above Normal 100-3
Engine Oil Pressure Sensor : Voltage Above Normal The Electronic Control Module (ECM) detects signal voltage that is not in the acceptable range.
The code is logged.
The value of the parameter is set to a gauge pressure.
100-4
Engine Oil Pressure Sensor : Voltage Below Normal 100-4
Engine Oil Pressure Sensor : Voltage Below Normal The ECM detects signal voltage that is not in the acceptable range.
The code is logged.
The value of the parameter is set to a gauge pressure.
101-3
Engine Crankcase Pressure : Voltage Above Normal 101-3
Crankcase Air Pressure Sensor : Voltage Above Normal The ECM detects signal voltage that is not in the acceptable range.
The code is logged.
The value of the parameter is set to a gauge pressure.
101-4
Engine Crankcase Pressure : Voltage Below Normal 101-4
Crankcase Air Pressure Sensor : Voltage Below Normal The ECM detects signal voltage that is not in the acceptable range.
The code is logged.
The value of the parameter is set to a gauge pressure.
108-3
Barometric Pressure : Voltage Above Normal 3528-3
Barometric Pressure Sensor : Voltage Above Normal The ECM detects signal voltage that is not in the acceptable range.
The code is logged.
The value of the parameter is set to a gauge pressure.
108-4
Barometric Pressure : Voltage Below Normal 3528-4
Barometric Pressure Sensor : Voltage Below Normal The ECM detects signal voltage that is not in the acceptable range.
The code is logged.
The value of the parameter is set to a gauge pressure.
109-3
Engine Coolant Pressure : Voltage Above Normal 2302-3
Engine Coolant Pump Outlet Pressure Sensor : Voltage Above Normal The ECM detects signal voltage that is not in the acceptable range.
The code is logged.
The value of the parameter is set to a gauge pressure.
109-4
Engine Coolant Pressure : Voltage Below Normal 2302-4
Engine Coolant Pump Outlet Pressure Sensor : Voltage Below Normal The ECM detects signal voltage that is not in the acceptable range.
The code is logged.
The value of the parameter is set to a gauge pressure.
411-3
Engine Exhaust Gas Recirculation Differential Pressure : Voltage Above Normal 3387-3
EGR Differential Pressure Sensor : Voltage Above Normal The ECM detects signal voltage that is not in the acceptable range.
The code is logged.
The value of the parameter is set to a gauge pressure.
411-4
Engine Exhaust Gas Recirculation Differential Pressure : Voltage Below Normal 3387-4
EGR Differential Pressure Sensor : Voltage Below Normal The ECM detects signal voltage that is not in the acceptable range.
The code is logged.
The value of the parameter is set to a gauge pressure.
1381-3
Engine Fuel Supply Pump Inlet Pressure : Voltage Above Normal 2247-3
Fuel Transfer Pump Intake Pressure Sensor : Voltage Above Normal The ECM detects signal voltage that is not in the acceptable range.
The code is logged.
The value of the parameter is set to a gauge pressure.
1381-4
Engine Fuel Supply Pump Inlet Pressure : Voltage Below Normal 2247-4
Fuel Transfer Pump Intake Pressure Sensor : Voltage Below Normal The ECM detects signal voltage that is not in the acceptable range.
The code is logged.
The value of the parameter is set to a gauge pressure.
2948-3
Engine Intake Valve Actuation System Oil Pressure : Voltage Above Normal 1924-3
Intake Valve Actuation System Oil Pressure Sensor : Voltage Above Normal The ECM detects signal voltage that is not in the acceptable range.
The code is logged.
The value of the parameter is set to a gauge pressure.
2948-4
Engine Intake Valve Actuation System Oil Pressure : Voltage Below Normal 1924-4
Intake Valve Actuation System Oil Pressure Sensor : Voltage Below Normal The ECM detects signal voltage that is not in the acceptable range.
The code is logged.
The value of the parameter is set to a gauge pressure.
3563-3
Engine Intake Manifold #1 Absolute Pressure : Voltage Above Normal 1785-3
Intake Manifold Pressure Sensor : Voltage Above Normal The ECM detects signal voltage that is not in the acceptable range.
The code is logged.
The value of the parameter is set to a gauge pressure.
3563-4
Engine Intake Manifold #1 Absolute Pressure : Voltage Below Normal 1785-4
Intake Manifold Pressure Sensor : Voltage Below Normal The ECM detects signal voltage that is not in the acceptable range.
The code is logged.
The value of the parameter is set to a gauge pressure.
5578-3
Engine Fuel Delivery Absolute Pressure : Voltage Above Normal 289-3
Fuel Pressure Sensor - Before Fuel Filter : Voltage Above Normal The ECM detects signal voltage that is not in the acceptable range.
The code is logged.
The value of the parameter is set to a gauge pressure.
5578-4
Engine Fuel Delivery Absolute Pressure : Voltage Below Normal 289-4
Fuel Pressure Sensor - Before Fuel Filter : Voltage Below Normal The ECM detects signal voltage that is not in the acceptable range.
The code is logged.
The value of the parameter is set to a gauge pressure.
5580-3
Engine Filtered Fuel Delivery Absolute Pressure : Voltage Above Normal 460-3
Fuel Pressure Sensor - After Fuel Filter : Voltage Above Normal The ECM detects signal voltage that is not in the acceptable range.
The code is logged.
The value of the parameter is set to a gauge pressure.
5580-4
Engine Filtered Fuel Delivery Absolute Pressure : Voltage Below Normal 460-4
Fuel Pressure Sensor - After Fuel Filter : Voltage Below Normal The ECM detects signal voltage that is not in the acceptable range.
The code is logged.
The value of the parameter is set to a gauge pressure.
Illustration 1 g06349438Recommended Actions
Table 2
Troubleshooting Test Steps Values Results
1. Check for Codes
A. Establish communication between Cat® Electronic Technician (ET) and the ECM . Refer to Troubleshooting, "Electronic Service Tools", if necessary.
B. Turn the keyswitch to ON.
C. Look for a -3, or -4 active or logged codes:
Codes
Result: A -3 code is active.
Proceed to Test Step 2.
Result: A -4 code is active.
Proceed to Test Step 3.
2. Create a Short at the Sensor Connector
A. Use a jumper wire to create a short circuit between the sensor signal and sensor return at the sensor connector.
B. Turn the keyswitch to ON.
C. Monitor the diagnostic codes on Cat ET. Check for an active -4 diagnostic code for the suspect sensor.
D. Turn the keyswitch to OFF.
Short Circuit
Result: A -4 diagnostic code became ac