GASKET 2G9794 - Caterpillar

System Operation Description:Use this procedure to troubleshoot the electrical system if a problem is suspected with a passive sensor. Also, use this procedure if any of the diagnostic codes in Table 1 is active or easily repeated.
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. 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
Poor acceleration under load
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 Sensor : Voltage Above Normal The ECM detects signal voltage that is greater than 4.95 VDC for 8 seconds. The code is logged after 7 minutes.
The value of the parameter is set to 90 °C (194 °F).
The engine will not enter cold mode while the code is active.
110-4 Engine Coolant Temperature Sensor voltage : Voltage Below Normal The ECM detects signal voltage that is less than 0.2 VDC for 8 seconds. The code is logged after 7 minutes.
The value of the parameter is set to 90 °C (194 °F).
The engine will not enter cold mode while the code is active.
172-3 Engine Air Inlet Temperature : Voltage Above Normal The ECM detects signal voltage that is greater than 4.95 VDC for 8 seconds. 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).
172-4 172-4 Engine Air Inlet Temperature : Voltage Below Normal The ECM detects signal voltage that is less than 0.2 VDC for 8 seconds. 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 Fuel Temperature Sensor : Voltage Above Normal The ECM detects signal voltage that is greater than 4.95 VDC for 8 seconds. 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 Fuel Temperature Sensor voltage : 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.
412-3 Engine Exhaust Gas