854254T 2 Mercury ENRICHENER

Table 1
Diagnostic Trouble Codes
J1939 Code and Description Conditions that Generate the Code System Response
105-3 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. The code is logged.
Engine coolant temperature is above −10 °C (15.0 °F).
The ECM will use the default value of 70 °C (158 °F).
The engine may show the following symptoms:
Poor stability
Poor cold running
White smoke
105-4 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.
110-3 Engine Coolant Temperature : Voltage Above Normal The ECM detects signal voltage that is greater than 4.95 VDC for 8 seconds. The code is logged.
The code is logged after seven minutes.
The value of the parameter is set to 90 °C (194 °F).
110-4 Engine Coolant Temperature : Voltage Below Normal The ECM detects signal voltage that is less than 0.2 VDC for 8 seconds.
172-3 Engine Air Inlet Temperature : Voltage Above Normal The ECM detects signal voltage that is greater than 4.95 VDC for 8 seconds. The code is logged.
Ambient temperature must be greater than −35 °C (−31 °F) in order to allow logging of this diagnostic code.
The value of the parameter is set to 85 °C (185 °F).
172-4 Engine Air Inlet Temperature : Voltage Below Normal The ECM detects signal voltage that is less than 0.2 VDC for 8 seconds. The code is logged.
Ambient temperature must be less than 140 °C (284 °F) in order to allow logging of this diagnostic code.
The value of the parameter is set to 85 °C (185 °F).
174-3 Engine Fuel Temperature 1 : Voltage Above Normal The ECM detects signal voltage that is greater than 4.95 VDC for 8 seconds. The code is logged.
Engine coolant temperature must be above −10 °C (14 °F) in order to allow logging of this diagnostic code.
The value of the parameter is set to the value of the engine coolant temperature.
174-4 Engine Fuel Temperature 1 : Voltage Below Normal The ECM detects signal voltage that is less than 0.2 VDC for 8 seconds. The code is logged.
The value of the parameter is set to the value of the engine coolant temperature.
175-3 Engine Oil Temperature 1 : Voltage Above Normal The ECM detects signal voltage that is greater than 4.95 VDC for 8 seconds. The code is logged.
175-4 Engine Oil Temperature 1 : Voltage Below Normal The ECM detects signal voltage that is less than 0.2 VDC for 8 seconds. The code is logged.
412-3 Engine Exhaust Gas Recirculation Temperature : Voltage Above Normal The ECM detects signal voltage that is greater than 4.95 VDC for 8 seconds. The code is logged.
412-4 Engine Exhaust Gas Recirculation Temperature : Voltage Below Normal The ECM detects signal voltage that is less than 0.2 VDC for 8 seconds. The code is logged.
1131-3 Engine Intake Manifold #2 Temperature : Voltage Above Normal The ECM detects signal voltage that is greater than 4.95 VDC for 8 seconds. The code is logged.
The code will not be logged if the ambient temperature is below −30° C (−22° F). The code may be active or the logged code may be pending until this temperature is reached. The value of the parameter is set to the value of the other intake manifold temperature sensor. If both sensor signals are lost, a value of 85° C (185° F)will be used.
1131-4 Engine Intake Manifold #2 Temperature : Voltage Below Normal The ECM detects signal voltage that is less than 0.2 VDC for 8 seconds. The code is logged.
Ambient air temperature must be less than 140° C (284° F) in order to allow logging of this diagnostic code. The code may be active or the logged code may be pending until this temperature is reached. The value of the parameter is set to the value of the other intake manifold temperature sensor. If both sensor signals are lost, a value of 85° C (185° F) will be used. 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 from the ECM to 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 g02175198
Schematic for the passive sensors
Illustration 2 g02175299
Terminal locations at the P1 ECM connector for the passive sensors
(P1-3) Return
(P1-5) Return
(P1-16) Engine oil temperature
(P1-17) Air inlet temperature
Illustration 3 g02134161
Terminal locations at the P2 ECM connector for the passive sensors
(P2-17) Return
(P2-30) Return
(P2-56) Intake manifold air temperature (right side)
(P2-62) NRS temperature
(P2-83) Return
(P2-84) Engine coolant temperature
(P2-95) Intake manifold air temperature (left side)
(P2-96) Fuel temperature
Illustration 4 g01155187
Terminal locations at the connector for the passive analog sensors
(Terminal 1) Sensor signal
(Terminal 2) Sensor return Test Step 1. Check for Diagnostic Codes
Connect Cat ET to the service tool connector.
Restore electrical power to the ECM.
Start the engine.
Access the "Active Diagnostic Code" screen on Cat ET. Note: The engine must be running for seven minutes in order for a 110-3 code to become active.
Look for these active codes or logged codes:
-3
-4Results: