74335 Mercruiser SCREW, MAIN BEARING CAPS

Table 1
Diagnostic Codes Table
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 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
Crankcase Air Pressure Sensor : 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
Crankcase Air Pressure Sensor : 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
Atmospheric Pressure Sensor : Voltage Above Normal 274-3
Atmospheric 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
Atmospheric Pressure Sensor : Voltage Below Normal 274-4
Atmospheric 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.
1176-3
Turbocharger #1 Compressor Inlet Pressure Sensor : Voltage Above Normal 2738-3
Turbocharger #1 Compressor Inlet 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.
1176-4
Turbocharger #1 Compressor Inlet Pressure Sensor : Voltage Below Normal 2738-4
Turbocharger #1 Compressor Inlet 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.
1387-3
Auxiliary Pressure Sensor : Voltage Above Normal 1835-3
Auxiliary 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.
1387-4
Auxiliary Pressure Sensor : Voltage Below Normal 1835-4
Auxiliary 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
Intake Manifold Pressure Sensor : 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
Intake Manifold Pressure Sensor : 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.
5417–3
Fuel Filter (Suction Side) Intake Pressure : Voltage Above Normal 2247–3
Fuel Filter (Suction Side) Intake Pressure : Voltage Above Normal The ECM detects signal voltage that is not in the acceptable range. The code is logged.
5417–4
Fuel Filter (Suction Side) Intake Pressure : Voltage Below Normal 2247–4
Fuel Filter (Suction Side) Intake Pressure : Voltage Below Normal The ECM detects signal voltage that is not in the acceptable range. The code is logged.
5578–3
Engine Fuel Delivery Absolute Pressure : Voltage Above Normal 289–3
Engine Fuel Delivery Absolute Pressure : Voltage Above Normal The ECM detects signal voltage that is not in the acceptable range. The code is logged.
5578–4
Engine Fuel Delivery Absolute Pressure : Voltage Below Normal 289–4
Engine Fuel Delivery Absolute Pressure : Voltage Below Normal The ECM detects signal voltage that is not in the acceptable range. The code is logged.
5580-3
Fuel Pressure Sensor - After Fuel Filter : 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
Fuel Pressure Sensor - After Fuel Filter : 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. 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 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 g06066994
Schematic for the active sensors
Table 2
Troubleshooting Test Steps Values Results
1. Check for Diagnostic Codes
A. Establish communication between Cat ET and the ECM . Refer to Troubleshooting, "Electronic Service Tools", if necessary.
B. Turn the keyswitch to the ON position.
C. Look for "-3", or "-4" active or logged codes.
Codes
Result: A -3 diagnostic code is active.
Proceed to Test Step 2.
Result: A -4 diagnostic code is active.
Proceed to Test Step 3.
2. Create a Short at the Sensor Connector
A. Use a test lamp to create a short between terminal 3 (signal) and terminal 2 (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 does not become active for the suspect sensor.
Proceed to Test Step 4.
Result: A -4 diagnostic code became active after creating the short at the sensor connector.
Repair: The wiring is OK. Replace the sensor.
If the problem is not resolved, proceed to Test Step 3.
3. Create an Open at the Suspect Sensor