F24747-1 Force FUEL PUMP DIAPHRAGM W/GASKETS

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 each sensor. The ECM uses this pull-up voltage in order to detect a problem in the signal circuit. When the ECM detects voltage that is above a threshold on the signal wire, the ECM activates a high voltage -3 diagnostic code. When the ECM detects voltage that is below a threshold on the signal wire, the ECM activates a low voltage -4 diagnostic code.Note: There may be a delay of 30 seconds or more in order for Caterpillar Electronic Technician (ET) to display an active diagnostic code. When you check for a diagnostic code, be sure to wait at least 30 seconds.The following components can cause these codes:
Electrical connector or wiring
Sensor
ECMThe most likely cause of a code is a problem with an electrical connector or wiring. The least likely cause of a code is the ECM.
Illustration 1 g01771134
Schematic for the analog sensors
Illustration 2 g01771293
Locations of the sensors that are associated with the analog signal (right front and left front engine view)
(1) Throttle valve differential pressure sensor
(2) Pressure sensor for the filtered engine oil
(3) Pressure sensor for the unfiltered engine oil
(4) Engine oil temperature sensor
(5) Intake manifold air temperature sensor
Illustration 3 g01771354
Locations of the connectors at the ECM junction box for the analog sensors
(6) J1/P1 ECM connectors
(7) Control harness connectors
Illustration 4 g01572213
Terminal locations at the P1 ECM connector for the analog sensors
(P1-2) Analog sensor supply
(P1-3) Analog return
(P1-14) Intake manifold air temperature
(P1-15) Throttle valve differential pressure
(P1-17) Engine oil temperature
(P1-24) Filtered engine oil pressure
(P1-26) Unfiltered engine oil pressure
Illustration 5 g01771413
Terminal locations at the control harness connector for the analog sensors
(Terminal k) Analog sensor supply for the engine oil temperature
(Terminal m) Analog return for the engine oil temperature
(Terminal n) Engine oil temperature
(Terminal p) Shield for the engine oil temperature
(Terminal t) Analog sensor supply for the intake manifold air temperature
(Terminal u) Analog return for the intake manifold air temperature
(Terminal v) Intake manifold air temperature
(Terminal w) Shield for the intake manifold air temperature
(Terminal x) Analog sensor supply for the unfiltered engine oil pressure
(Terminal y) Analog return for the unfiltered engine oil pressure
(Terminal z) Unfiltered engine oil pressure
(Terminal AA) Shield for the unfiltered engine oil pressure
(Terminal AC) Analog sensor supply for the filtered engine oil pressure
(Terminal AD) Analog return for the filtered engine oil pressure
(Terminal AE) Filtered engine oil pressure
(Terminal AF) Shield for the filtered engine oil pressure
(Terminal BD) Analog sensor supply for the throttle valve differential pressure
(Terminal BE) Analog return for the throttle valve differential pressure
(Terminal BF) Throttle valve differential pressure
(Terminal BH) Shield for the throttle valve differential pressure