850270 1 Mercury ECU ASSEMBLY

Table 1
J1939 Code and Description CDL Code and Description Comments
95-2
Engine Fuel Filter Differential Pressure : Erratic, Intermittent, or Incorrect 95-2
Fuel Filter Differential Pressure Sensor : Erratic, Intermittent, or Incorrect The value of the parameter is set to a default value.
The code is logged.
99-2
Engine Oil Filter Differential Pressure : Erratic, Intermittent, or Incorrect 99-2
Engine Oil Filter Differential Pressure Sensor : Erratic, Intermittent, or Incorrect The value of the parameter is set to a default value.
The code is logged.
100-3
Engine Oil Pressure : Voltage Above Normal 100-3
Engine Oil Pressure Sensor : Voltage Above Normal The value of the parameter is set to a default value.
The code is logged.
100-4
Engine Oil Pressure : Voltage Below Normal 100-4
Engine Oil Pressure Sensor : Voltage Below Normal The value of the parameter is set to a default value.
The code is logged.
101-3
Engine Crankcase Pressure : Voltage Above Normal 101-3
Engine Crankcase Pressure : Voltage Above Normal The value of the parameter is set to a default value.
The code is logged.
101-4
Engine Crankcase Pressure : Voltage Below Normal 101-4
Engine Crankcase Pressure : Voltage Below Normal The value of the parameter is set to a default value.
The code is logged.
108-3
Barometric Pressure : Voltage Above Normal 3528-3
Barometric Pressure Sensor : Voltage Above Normal The value of the parameter is set to a default value.
The code is logged.
108-4
Barometric Pressure : Voltage Below Normal 3528-4
Barometric Pressure Sensor : Voltage Below Normal The value of the parameter is set to a default value.
The code is logged.
1176-3
Engine Turbocharger #1 Compressor Inlet Pressure : Voltage Above Normal 2738-3
Turbocharger #1 Compressor Inlet Pressure Sensor : Voltage Above Normal The value of the parameter is set to a default value.
The code is logged.
1176-4
Engine Turbocharger #1 Compressor Inlet Pressure : Voltage Below Normal 2738-4
Turbocharger #1 Compressor Inlet Pressure Sensor : Voltage Below Normal The value of the parameter is set to a default value.
The code is logged.
1177-3
Engine Turbocharger #2 Compressor Inlet Pressure : Voltage Above Normal 2739-3
Turbocharger #2 Compressor Inlet Pressure Sensor : Voltage Above Normal The value of the parameter is set to a default value.
The code is logged.
1177-4
Engine Turbocharger #2 Compressor Inlet Pressure : Voltage Below Normal 2739-4
Turbocharger #2 Compressor Inlet Pressure Sensor : Voltage Below Normal The value of the parameter is set to a default value.
The code is logged.
1178-3
Engine Turbocharger #3 Compressor Inlet Pressure : Voltage Above Normal 2740-3
Turbocharger #3 Compressor Inlet Pressure Sensor : Voltage Above Normal The value of the parameter is set to a default value.
The code is logged.
1178-4
Engine Turbocharger #3 Compressor Inlet Pressure : Voltage Below Normal 2740-4
Turbocharger #3 Compressor Inlet Pressure Sensor : Voltage Below Normal The value of the parameter is set to a default value.
The code is logged.
1179-3
Engine Turbocharger #4 Compressor Inlet Pressure : Voltage Above Normal 2741-3
Turbocharger #4 Compressor Inlet Pressure Sensor : Voltage Above Normal The value of the parameter is set to a default value.
The code is logged.
1179-4
Engine Turbocharger #4 Compressor Inlet Pressure : Voltage Below Normal 2741-4
Turbocharger #4 Compressor Inlet Pressure Sensor : Voltage Below Normal The value of the parameter is set to a default value.
The code is logged.
1208-3
Engine Pre-filter Oil Pressure : Voltage Above Normal 542-3
Engine Oil Pressure Sensor - Before Oil Filter : Voltage Above Normal The value of the parameter is set to a default value.
The code is logged.
1208-4
Engine Pre-filter Oil Pressure : Voltage Below Normal 542-4
Engine Oil Pressure Sensor - Before Oil Filter : Voltage Below Normal The value of the parameter is set to a default value.
The code is logged.
3563-3
Engine Intake Manifold #1 Absolute Pressure : Voltage Above Normal 1785-3
Intake Manifold Pressure Sensor : Voltage Above Normal The value of the parameter is set to a default value.
The code is logged.
3563-4
Engine Intake Manifold #1 Absolute Pressure : Voltage Below Normal 1785-4
Intake Manifold Pressure Sensor : Voltage Below Normal The value of the parameter is set to a default value.
The code is logged.
5578-3
Engine Fuel Delivery Absolute Pressure : Voltage Above Normal 289-3
Fuel Pressure Sensor - Before Fuel Filter : Voltage Above Normal The value of the parameter is set to a default value.
The code is logged.
5578-4
Engine Fuel Delivery Absolute Pressure : Voltage Below Normal 289-4
Fuel Pressure Sensor - Before Fuel Filter : Voltage Below Normal The value of the parameter is set to a default value.
The code is logged.
5580-3
Engine Filtered Fuel Delivery Absolute Pressure : Voltage Above Normal 460-3
Fuel Pressure Sensor - After Fuel Filter : Voltage Above Normal The value of the parameter is set to a default value.
The code is logged.
5580-4
Engine Filtered Fuel Delivery Absolute Pressure : Voltage Below Normal 460-4
Fuel Pressure Sensor - After Fuel Filter : Voltage Below Normal The value of the parameter is set to a default value.
The code is logged. The supply voltage is routed to terminal 1 of each sensor connector. The sensor return is routed to terminal 2 of each sensor connector. The sensor signal is routed to terminal 3 of each sensor connector. The Electronic Control Module (ECM) provides short circuit protection for the internal power supply. A short circuit to the battery will not damage the internal power supply.Diagnostics on the Cat® Electronic Technician (ET)Wiggle Test - The Wiggle Test allows you to monitor the status of the signals from the sensors.For additional information regarding the Wiggle Test, refer to the documentation that accompanies the Cat ET software.
Illustration 1 g06343801
Table 2
Troubleshooting Test Steps Values Results
1. Check for Codes
A. Connect Cat® Electronic Technician (ET) to the service tool connector.
B. Determine if a code is active or logged.
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. Turn the keyswitch to the OFF position.
B. Disconnect the sensor with the active -3 code.
C. Install the jumper wire between the following terminals at the sensor connector:
- Terminal 3 (signal) and Terminal 2 (sensor return)
D. Connect Cat ET.
E. Use Cat ET to monitor the following:
- -4 code
F. Turn the keyswitch to the OFF position.
Create a Short
Result: A -4 code did not become active.
Proceed to Test Step 4.
Result: A -4 code became active.
Repair: The wiring harness is OK. Replace the