73815 2 Mercruiser TUBE, SIGHT, PUMP TO CARBURETOR

Table 1
Diagnostic Trouble Codes
J1939 Code CDL Code Code Description
(code descriptions may vary Comments
105-3 172-3 Engine Intake Manifold #1 Temperature : Voltage Above Normal The Electronic Control Module (ECM) detects the following conditions:
The signal voltage from the intake manifold air temperature sensor is greater than 4.95 VDC for more than 8 seconds.
Engine coolant temperature is above −10 °C (15.0 °F).
The ECM will use the default value of 70 °C (158 °F) for the intake manifold air temperature. "Voltage High" will be displayed next to the status for "Intake Manifold Air Temperature" on the electronic service tool.
The engine may show the following symptoms:
Poor stability
Poor cold running
Poor acceleration under load
White smoke
105-4 172-4 Engine Intake Manifold #1 Temperature : Voltage Below Normal The ECM detects the following conditions:
The signal voltage from the intake manifold air temperature sensor is less than 0.2 VDC for more than 8 seconds.
The ECM will use the default value of 70 °C (158°F) for the intake manifold air temperature. "Voltage Low" will be displayed next to the status for "Intake Manifold Air Temperature" on the electronic service tool.
The engine may show the following symptoms:
Poor stability
Poor cold running
Poor acceleration under load
White smoke
110-3 110-3 Engine Coolant Temperature : Voltage Above Normal The ECM detects the following conditions:
The signal voltage from the engine coolant temperature sensor is greater than 4.95 VDC for more than 8 seconds.
An active diagnostic code will be generated after 8 seconds.
The ECM will default to 90 °C (194 °F) for engine coolant temperature. "Voltage Above Normal" will be displayed next to the status for "Engine Coolant Temperature" on the electronic service tool.
The engine may show the following symptoms:
Poor stability
Poor cold running
White smoke
110-4 110-4 Engine Coolant Temperature : Voltage Below Normal The ECM detects the following conditions:
The signal voltage from the engine coolant temperature sensor is less than 0.2 VDC for more than 8 seconds.
An active diagnostic code will be generated after 8 seconds. The diagnostic code will be logged if the engine has been operating for more than 7 minutes.
The ECM will default to 90 °C (194 °F) for engine coolant temperature. "Voltage Below Normal" will be displayed next to the status for "Engine Coolant Temperature" on the electronic service tool.
The engine may show the following symptoms:
Poor stability
Poor cold running
White smoke
441-3 1836-3 Auxiliary Temperature #1 : Voltage Above Normal The ECM detects the following conditions:
The signal voltage from the auxiliary temperature sensor is greater than 4.95 VDC for more than 8 seconds.
An active diagnostic code will be generated after 8 seconds. The diagnostic code will be logged if the engine has been operating for more than 7 minutes.
"Voltage Above Normal" will be displayed next to the status for "Auxiliary Temperature" on the electronic service tool.
441-4 1836-4 Auxiliary Temperature #1 : Voltage Below Normal The ECM detects the following conditions:
The signal voltage from the auxiliary temperature sensor is less than 0.2 VDC for more than 8 seconds.
An active diagnostic code will be generated after 8 seconds. The diagnostic code will be logged if the engine has been operating for more than 7 minutes.
"Voltage Below Normal" will be displayed next to the status for "Auxiliary Temperature" on the electronic service tool.
2630-3 3372-3 Engine Charge Air Cooler Outlet Temperature : Voltage Above Normal The ECM detects the following conditions:
The signal voltage from the ATAAC outlet temperature sensor is greater than 4.95 VDC for more than 8 seconds.
An active diagnostic code will be generated after 8 seconds. The diagnostic code will be logged if the engine has been operating for more than 7 minutes.
"Voltage Above Normal" will be displayed next to the status for "ATAAC Temperature" on the electronic service tool.
2630-4 3372-4 Engine Charge Air Cooler Outlet Temperature : Voltage Below Normal The ECM detects the following conditions:
The signal voltage from the ATAAC outlet temperature sensor is less than 0.2 VDC for more than 8 seconds.
An active diagnostic code will be generated after 8 seconds. The diagnostic code will be logged if the engine has been operating for more than 7 minutes.
"Voltage Below Normal" will be displayed next to the status for "ATAAC Temperature" on the electronic service tool.
- 171-4 Ambient Air Temperature Sensor voltage below normal The ECM detects the following conditions:
The signal voltage from the ambient air temperature sensor is less than 0.2 VDC for more than 8 seconds.
"Voltage Low" will be displayed next to the status for "Ambient Air Temperature" on the electronic service tool.
The engine may show the following symptoms:
Poor stability
Poor cold running
Poor acceleration under load
White smoke
- 600-3 Hydraulic Oil Temperature Sensor voltage above normal The ECM detects the following conditions:
The signal voltage from the hydraulic oil temperature sensor is greater than 4.95 VDC for more than 8 seconds.
An active diagnostic code will be generated after 8 seconds.
The ECM will default to 90 °C (194 °F) for engine coolant temperature. "Voltage Above Normal" will be displayed next to the status for "Hydraulic Oil Temperature" on the electronic service tool.
- 600-4 Hydraulic Oil Temperature Sensor voltage below normal The ECM detects the following conditions:
The signal voltage from the hydraulic oil temperature sensor is less than 0.2 VDC for more than 8 seconds.
An active diagnostic code will be generated after 8 seconds. The diagnostic code will be logged if the engine has been operating for more than 7 minutes.
The ECM will default to 90 °C (194 °F) for engine coolant temperature. "Voltage Below Normal" will be displayed next to the status for "Hydraulic Oil Temperature" on the electronic service tool.
Follow the troubleshooting procedure in order to identify the root cause of the fault. Note: The following conditions must exist before any of the above codes will become active:
The ECM has been powered for at least 2 seconds.
There are no active 168-X diagnostic codes.The ECM will log the diagnostic code. If equipped, the warning light will come on.The following background information is related to this procedure:The troubleshooting procedures for the diagnostic codes of each temperature sensor are identical. The temperature sensors have two terminals. The signal line is connected to each sensor connector terminal 1. Terminal 2 is the return