55897 Mercruiser SEAL, EXHAUST COVER

Table 1
Diagnostic Codes Table
J1939 Code Code Description Comments
110-3 Engine Coolant Temperature : Voltage Above Normal The code is logged if the engine has been running for more than seven minutes and an open circuit has been detected.
110-4 Engine Coolant Temperature : Voltage Below Normal The code is logged. The ECM detects voltage that is not in the acceptable range.
171-3 Ambient Air Temperature : Voltage Above Normal The code is logged. The ECM detects voltage that is not in the acceptable range.
171-4 Ambient Air Temperature : Voltage Below Normal The code is logged. The ECM detects voltage that is not in the acceptable range.
172-3 Engine Air Inlet Temperature : Voltage Above Normal The code is logged.
The ECM detects voltage that is not in the acceptable range.
172-4 Engine Air Inlet Temperature : Voltage Below Normal The code is logged.
The ECM detects voltage that is not in the acceptable range.
174-3 Engine Fuel Temperature 1 : Voltage Above Normal The code is logged. The ECM will flag the fuel temperature as invalid data and the fuel temperature is set to a default value of 40 °C (104 °F).
174-4 Engine Fuel Temperature 1 : Voltage Below Normal
175-3 Engine Oil Temperature 1 : Voltage Above Normal The code is logged. The ECM detects voltage that is not in the acceptable range.
175-4 Engine Oil Temperature 1 : Voltage Below Normal The code is logged. The ECM detects voltage that is not in the acceptable range.
412-3 Engine Exhaust Gas Recirculation Temperature : Voltage Above Normal The code is logged.
The ECM detects voltage that is not in the acceptable range.
412-4 Engine Exhaust Gas Recirculation Temperature : Voltage Below Normal The code is logged.
The ECM detects voltage that is not in the acceptable range.
441-3 Auxiliary Temperature #1 : Voltage Above Normal The code is logged. The ECM will flag the temperature as invalid data and the temperature is set to a default value.
441-4 Auxiliary Temperature #1 : Voltage Below Normal The code is logged. The ECM will flag the temperature as invalid data and the temperature is set to a default value.
442-3 Auxiliary Temperature #2 : Voltage Above Normal The code is logged. The ECM will flag the temperature as invalid data and the temperature is set to a default value.
442-4 Auxiliary Temperature #2 : Voltage Below Normal The code is logged. The ECM will flag the temperature as invalid data and the temperature is set to a default value.
1385-3 Auxiliary Temperature #1 : Voltage Above Normal The code is logged. The ECM will flag the temperature as invalid data and the temperature is set to a default value.
1385-4 Auxiliary Temperature #1 : Voltage Below Normal The code is logged. The ECM will flag the temperature as invalid data and the temperature is set to a default value.
2630-3 Engine Charge Air Cooler Outlet Temperature : Voltage Above Normal The code is logged.
The ECM detects voltage that is not in the acceptable range.
2630-4 Engine Charge Air Cooler Outlet Temperature : Voltage Below Normal The code is logged.
The ECM detects voltage that is not in the acceptable range. System OverviewThe sensor signal for the passive sensor is routed from the ECM to terminal 1 of each sensor connector. The sensor return for the passive sensors is routed to the ECM from terminal 2 of each sensor connector.Diagnostics on the Caterpillar 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 g01155187
Terminal locations at the connector for the passive analog sensors
(Terminal 1) Sensor signal
(Terminal 2) Analog sensor return
Illustration 2 g03665814
Table 2
Troubleshooting Test Steps Values Results
1. Check for Diagnostic Trouble Codes
A. Connect to Caterpillar Electronic Technician (ET).
B. Turn the keyswitch to the ON position.
C. Access the "Active Diagnostic Code" screen on Cat ET.
Wait at least 30 seconds in order for the diagnostic codes to become active.
D. Look for these active codes or logged codes:
1. -3
2. -4
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.
Result: To troubleshoot a logged a 412-3 diagnostic code during cold mode, Proceed to Test Step 5.
This code will not become active during cold mode.
Result: For a diagnostic code that is logged but not currently active, Proceed to Test Step 4.
2. Create a Short at the Sensor Connector
A. Turn the keyswitch to the OFF position.
B. Disconnect the suspect sensor.
C. Install the jumper wire between terminal 1 (sensor signal) and terminal 2 (sensor return) at the sensor connector.
D. Turn the keyswitch to the ON position.
E. Monitor the diagnostic codes on Cat ET. Check for an active -4 diagnostic code for the suspect sensor.
Wait at least 30 seconds in order for the diagnostic codes to become active.
F. Turn the keyswitch to the OFF position.
Short circuit recognized
Result: The -3 diagnostic code remains active for the suspect sensor.
There is an open in the harness. Repair the wiring or replace the harness.
Verify that the problem is resolved.
Result: A -4 diagnostic code became active after creating the short at the sensor connector.
The wiring is OK. Replace the sensor.
Verify that the problem is resolved.
3. Create an Open at the Suspect Sensor Connector
A. Turn the keyswitch to the OFF position.
B. Disconnect the sensor connector of the suspect sensor with the active -4 diagnostic code.
C. Turn the keyswitch to the ON position.
D. Monitor the diagnostic codes on Cat ET. Check for an active -3 diagnostic code for the suspect sensor.
Wait at least 30 seconds in order for the diagnostic codes to become active.
A 412-3code will not become active during "Cold Mode". Run the engine to exit cold mode before troubleshooting a 412-3 code.
For a 110-3 code, start the engine and let the engine idle for 7 minutes. The engine must be running for at least 7 minutes in order for the diagnostic to run.
E. Turn the ke