853471A 1 OUTLET ASSEMBLY, Water Mercruiser
473B116KD
OUTLET
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Number on catalog scheme: 51
Compatible models:
473B116KD
Mercruiser
Mercruiser entire parts catalog list:
Information:
Recommended Actions
Note: If the problem only occurs under certain conditions, test the engine under those conditions. Examples of certain conditions are high engine idle, full load, or a specific operating temperature. Troubleshooting the symptoms under other conditions may give misleading results.
Table 1
Troubleshooting Test Steps Values Results
1. Check for Active Codes and Logged Codes
A. Establish communication between Cat Electronic Technician (ET) and the Electronic Control Module (ECM).
B. Certain event codes may derate engine power. Monitor the diagnostic codes on Cat ET. Check for active diagnostic codes and logged codes (intermittent problems).
Note: Wait at least 30 seconds in order for diagnostic codes to become active.
Codes
Result: A code is active or logged.
Repair: Troubleshoot any codes before continuing with this procedure.
Verify that the repair eliminated the problem.
Result: A code is not active or logged.
Proceed to Test Step 2.
2. Cold Mode
A. Use Cat ET to verify that the engine has exited cold mode. Cold mode operation may slow throttle response.
If the engine is operating in cold mode, an indicator will be displayed on the top of any of the status screen.
Note: Although a sensors signal may be in the operational range of the sensor, certain failure modes of a sensor may produce an output signal that does not represent an accurate measurement. Use Cat ET to check that the pressures and the temperatures are fluctuating normally. Also check that the values are reasonable for the conditions that are present.
Cold Mode
Result: The engine is not operating in cold mode.
Proceed to Test Step 3.
Result: The engine has not exited from the cold mode.
Repair: This is normal operation. Return the engine to service.
3. Ensure that the latest Flash File Software is installed in the ECM
A. Use Cat ET to verify that the correct flash file is being used.
Flash File
Result: The latest flash file is installed.
Proceed to Test Step 4.
Result: The latest flash file is not installed.
Repair: Perform the following procedure.
1. Download the latest flash file from SIS Web.
2. Install the software into the ECM.
Refer to Troubleshooting, "ECM Software - Install for additional information".
4. Check for an Intermittent Throttle Signal
A. Monitor the status for "Throttle Position" on Cat ET.
B. Verify that the status for "Throttle Position" is stable and that the engine is able to reach high idle speed.
Throttle Signal
Result: The status for "Throttle Position" is stable.
Proceed to Test Step 5.
Result: The status for "Throttle Position" is not stable.
Repair: Make the necessary repairs. Refer to the appropriate diagnostic functional test for your application:
- Troubleshooting, "Throttle Position Sensor Circuit - Test"
- Troubleshooting, "Throttle Switch Circuit - Test"
- Troubleshooting, "Speed Control - Test"
Verify that the repair eliminated the problem.
5. Monitor the Decelerator Pedal
A. Monitor the decelerator pedal on Cat ET.
Decelerator Pedal
Result: Verify that the decelerator pedal is operating properly.
Repair: Refer to Troubleshooting,"Deceleration Position Sensor Circuit - Test" for the proper troubleshooting procedure.
If the problem is not resolved, proceed to Test Step 6.
6. Injection Actuation Pressure
If service has recently been performed on the engine, air may be present in the injection actuation pressure circuit. Allow the engine to fully warm up and operate the engine under load in order to purge the air from the injection actuation pressure circuit.
A. Check the engine oil level. Engine oil supplies the injection actuation pressure circuit. The engine oil must be kept at the proper level for fuel injection.
B. Check the injection actuation pressure. Refer to the diagnostic functional test Troubleshooting, "Injection Actuation Pressure - Test".
C. Check the operation of the injection actuation control valve. Refer to the diagnostic functional test Troubleshooting, "Injection Actuation Pressure Control Valve Circuit - Test".
Injection Actuation
Result: The engine oil level is correct and the injection actuation system is operating properly.
Proceed to Test Step 9.
Result:The engine oil level is not correct and/or the injection actuation system is not properly operating.
Repair: Make the necessary repairs and return to service.
If the problem is not resolved, proceed to Test Step 7.
7. Check the condition of the connectors at the ECM.
A. Check for the correct installations of the J2/P2 ECM connectors.
B. Check the J300/P300 injector solenoid harness connector.
Electrical Connectors
Result: There is no problem in the connectors and/or wiring.
Proceed to Test Step 8.
Result: There is a problem in the connectors and/or wiring.
Repair: Refer to the diagnostic functional test Troubleshooting, "Electrical Connectors - Inspect".
8. Unit Injectors
A. Perform the "Injector Solenoid Test" on Cat ET in order to determine if all of the injector solenoids are being energized by the ECM.
B. Perform the "Cylinder Cutout Test" in order to identify any injectors that might be misfiring.
Note: Refer to the procedure in Special Instruction, "Procedure for Troubleshooting and Cleaning the Oil Rail System for the Hydraulic Electronic Unit Injector".
Fuel Injectors
Result: The tests were successful.
Proceed to Test Step 9.
Result: The tests were NOT successful.
Repair: Remove the suspect injector, and install a new electronic unit injector. Refer to Disassembly and Assembly.
Ensure that the repairs have determined the problem. Refer to Troubleshooting, "Injector Solenoid - Test" and Troubleshooting, "Injection Actuation Pressure"
If the problem is not resolved, proceed to Test Step 9.
9. Intake Manifold (Boost) Pressure Sensor
A. With the engine at full load, monitor "Fuel Position" and "Rated Fuel Limit" on the status screen. If "Fuel Position" does not equal "Rated Fuel Limit", then check intake manifold (Boost) pressure.
B. Monitor the intake manifold (boost) pressure and atmospheric pressure for normal operation on the status scree.
Sensor
Result: The intake manifold pressure sensor is operating correctly.
Proceed to Test Step 10.
Result: The intake manifold pressure sensor is not operating correctly.
Repair: Replace the intake manifold pressure sensor.
If the problem is not resolved, proceed to Test Step 10.
10. Air
Note: If the problem only occurs under certain conditions, test the engine under those conditions. Examples of certain conditions are high engine idle, full load, or a specific operating temperature. Troubleshooting the symptoms under other conditions may give misleading results.
Table 1
Troubleshooting Test Steps Values Results
1. Check for Active Codes and Logged Codes
A. Establish communication between Cat Electronic Technician (ET) and the Electronic Control Module (ECM).
B. Certain event codes may derate engine power. Monitor the diagnostic codes on Cat ET. Check for active diagnostic codes and logged codes (intermittent problems).
Note: Wait at least 30 seconds in order for diagnostic codes to become active.
Codes
Result: A code is active or logged.
Repair: Troubleshoot any codes before continuing with this procedure.
Verify that the repair eliminated the problem.
Result: A code is not active or logged.
Proceed to Test Step 2.
2. Cold Mode
A. Use Cat ET to verify that the engine has exited cold mode. Cold mode operation may slow throttle response.
If the engine is operating in cold mode, an indicator will be displayed on the top of any of the status screen.
Note: Although a sensors signal may be in the operational range of the sensor, certain failure modes of a sensor may produce an output signal that does not represent an accurate measurement. Use Cat ET to check that the pressures and the temperatures are fluctuating normally. Also check that the values are reasonable for the conditions that are present.
Cold Mode
Result: The engine is not operating in cold mode.
Proceed to Test Step 3.
Result: The engine has not exited from the cold mode.
Repair: This is normal operation. Return the engine to service.
3. Ensure that the latest Flash File Software is installed in the ECM
A. Use Cat ET to verify that the correct flash file is being used.
Flash File
Result: The latest flash file is installed.
Proceed to Test Step 4.
Result: The latest flash file is not installed.
Repair: Perform the following procedure.
1. Download the latest flash file from SIS Web.
2. Install the software into the ECM.
Refer to Troubleshooting, "ECM Software - Install for additional information".
4. Check for an Intermittent Throttle Signal
A. Monitor the status for "Throttle Position" on Cat ET.
B. Verify that the status for "Throttle Position" is stable and that the engine is able to reach high idle speed.
Throttle Signal
Result: The status for "Throttle Position" is stable.
Proceed to Test Step 5.
Result: The status for "Throttle Position" is not stable.
Repair: Make the necessary repairs. Refer to the appropriate diagnostic functional test for your application:
- Troubleshooting, "Throttle Position Sensor Circuit - Test"
- Troubleshooting, "Throttle Switch Circuit - Test"
- Troubleshooting, "Speed Control - Test"
Verify that the repair eliminated the problem.
5. Monitor the Decelerator Pedal
A. Monitor the decelerator pedal on Cat ET.
Decelerator Pedal
Result: Verify that the decelerator pedal is operating properly.
Repair: Refer to Troubleshooting,"Deceleration Position Sensor Circuit - Test" for the proper troubleshooting procedure.
If the problem is not resolved, proceed to Test Step 6.
6. Injection Actuation Pressure
If service has recently been performed on the engine, air may be present in the injection actuation pressure circuit. Allow the engine to fully warm up and operate the engine under load in order to purge the air from the injection actuation pressure circuit.
A. Check the engine oil level. Engine oil supplies the injection actuation pressure circuit. The engine oil must be kept at the proper level for fuel injection.
B. Check the injection actuation pressure. Refer to the diagnostic functional test Troubleshooting, "Injection Actuation Pressure - Test".
C. Check the operation of the injection actuation control valve. Refer to the diagnostic functional test Troubleshooting, "Injection Actuation Pressure Control Valve Circuit - Test".
Injection Actuation
Result: The engine oil level is correct and the injection actuation system is operating properly.
Proceed to Test Step 9.
Result:The engine oil level is not correct and/or the injection actuation system is not properly operating.
Repair: Make the necessary repairs and return to service.
If the problem is not resolved, proceed to Test Step 7.
7. Check the condition of the connectors at the ECM.
A. Check for the correct installations of the J2/P2 ECM connectors.
B. Check the J300/P300 injector solenoid harness connector.
Electrical Connectors
Result: There is no problem in the connectors and/or wiring.
Proceed to Test Step 8.
Result: There is a problem in the connectors and/or wiring.
Repair: Refer to the diagnostic functional test Troubleshooting, "Electrical Connectors - Inspect".
8. Unit Injectors
A. Perform the "Injector Solenoid Test" on Cat ET in order to determine if all of the injector solenoids are being energized by the ECM.
B. Perform the "Cylinder Cutout Test" in order to identify any injectors that might be misfiring.
Note: Refer to the procedure in Special Instruction, "Procedure for Troubleshooting and Cleaning the Oil Rail System for the Hydraulic Electronic Unit Injector".
Fuel Injectors
Result: The tests were successful.
Proceed to Test Step 9.
Result: The tests were NOT successful.
Repair: Remove the suspect injector, and install a new electronic unit injector. Refer to Disassembly and Assembly.
Ensure that the repairs have determined the problem. Refer to Troubleshooting, "Injector Solenoid - Test" and Troubleshooting, "Injection Actuation Pressure"
If the problem is not resolved, proceed to Test Step 9.
9. Intake Manifold (Boost) Pressure Sensor
A. With the engine at full load, monitor "Fuel Position" and "Rated Fuel Limit" on the status screen. If "Fuel Position" does not equal "Rated Fuel Limit", then check intake manifold (Boost) pressure.
B. Monitor the intake manifold (boost) pressure and atmospheric pressure for normal operation on the status scree.
Sensor
Result: The intake manifold pressure sensor is operating correctly.
Proceed to Test Step 10.
Result: The intake manifold pressure sensor is not operating correctly.
Repair: Replace the intake manifold pressure sensor.
If the problem is not resolved, proceed to Test Step 10.
10. Air