GEAR-SUN 7G5593 - Caterpillar

System Operation Description:Use this procedure to troubleshoot the electrical system if a problem is suspected with the circuit for one of the analog sensors or if one of the diagnostic codes in Table 1 is active or easily repeated.
Table 1
Diagnostic Codes Table
Description Conditions which Generate this Code System Response
100-3 Engine Oil Pressure Sensor : Voltage Above Normal The Electronic Control Module (ECM) has detected a voltage on the sensor's signal wire that is greater than 4.8 volts for five seconds. The code is logged.
The alarm output is activated.
The shutdown output is activated.
The engine is shut down.
The value of the parameter is set to the last value from the sensor that is valid.
100-4 Engine Oil Pressure Sensor : Voltage Below Normal The ECM has detected a voltage on the sensor's signal wire that is less than 0.2 volts for five seconds.
172-3 Intake Manifold Air Temperature Sensor : Voltage Above Normal The ECM has detected a voltage on the sensor's signal wire that is greater than 4.8 volts for five seconds.
172-4 Intake Manifold Air Temperature Sensor : Voltage Below Normal The ECM has detected a voltage on the sensor's signal wire that is less than 0.2 volts for five seconds.
175-3 Engine Oil Temperature Sensor : Voltage Above Normal The ECM has detected a voltage on the sensor's signal wire that is greater than 4.8 volts for five seconds.
175-4 Engine Oil Temperature Sensor : Voltage Below Normal The ECM has detected a voltage on the sensor's signal wire that is less than 0.2 volts for five seconds.
542-3 Engine Oil Pressure Sensor - Before Oil Filter : Voltage Above Normal The ECM has detected a voltage on the sensor's signal wire that is greater than 4.8 volts for five seconds. The code is logged.
The alarm output is activated.
The value of the parameter is set to the last value from the sensor that is valid.
542-4 Engine Oil Pressure Sensor - Before Oil Filter : Voltage Below Normal The ECM has detected a voltage on the sensor's signal wire that is less than 0.2 volts for five seconds.
3185-3 Engine Throttle Valve Differential Pressure Sensor : Voltage Above Normal The ECM has detected a voltage on the sensor's signal wire that is greater than 4.9 volts. The code is logged.
The alarm output is activated.
The shutdown output is activated.
The engine is shut down.
3185-4 Engine Throttle Valve Differential Pressure Sensor : Voltage Below Normal The ECM has detected a voltage on the sensor's signal wire that is less than 0.2 volts.
3185-12 Engine Throttle Valve Differential Pressure Sensor : Failure During the sensor's calibration sequence, the calibration offset for the sensor signal is greater than 7 kPa (1 psi). The code is logged.
The alarm output is activated.
The offset value for the calibration is set to the last value from the sensor that is valid. The following analog sensors are used by this engine:
Engine oil temperature
Filtered engine oil pressure
Inlet air temperature
Throttle valve differential pressure
Unfiltered engine oil pressureBackground InformationThe ECM continuously creates a pull-up voltage on the signal wire for