823352 Volvo.Penta Heat shield

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.    The following analog sensors are used by this engine:
Differential pressure sensor
Engine oil temperature
Filtered engine oil pressure
Inlet air temperature
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 g01572155
Schematic for the analog sensors
Illustration 2 g01419583
Locations of the sensors that are associated with the analog signal (right front and left front engine view) (1) Intake manifold air temperature sensor (2) Pressure sensor for the unfiltered engine oil (3) Pressure sensor for the filtered engine oil (4) Engine oil temperature sensor
Illustration 3 g01420334
Locations of the connectors at the terminal box for the master ECM (5) J1/P1 ECM connectors for the analog sensors (6) J7/P7 control harness connectors for the analog sensors
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) Differential pressure (P1-17) Engine oil temperature (P1-24) Filtered engine oil pressure (P1-26) Unfiltered engine oil pressure
Illustration 5 g01572253
Terminal locations at the P7 control harness connector for the analog sensors (P7-a) Shield for the differential pressure (P7-b) Shield for the engine oil temperature (P7-d) Analog return for the unfiltered engine oil pressure (P7-n) Shield for the unfiltered engine oil pressure (P7-A) Analog sensor supply for the intake manifold air temperature (P7-B) Analog sensor supply for the filtered engine oil pressure (P7-D) Differential pressure (P7-E) Analog sensor supply for the engine oil temperature (P7-F) Intake manifold air temperature (P7-G) Filtered engine oil pressure (P7-I) Analog sensor supply for the differential pressure (P7-K) Analog sensor supply for the unfiltered engine oil pressure (P7-J) Engine oil temperature (P7-L) Analog return for the intake manifold air temperature (P7-M) Analog return for the filtered engine oil pressure (P7-R) Analog return for the differential pressure (P7-S) Analog return for the engine oil temperature (P7-U) Unfiltered engine oil pressure (P7-V) Shield for the intake manifold air temperature (P7-W) Shield for the filtered engine oil pressure
Illustration 6 g01240891
Terminal locations at the harness connector for the differential pressure sensor (Terminal 1) Analog sensor supply (Terminal 2) Analog return (Terminal 3) Signal
Illustration 7 g01414254
Terminal locations at the harness connector for the analog sensors (Terminal A) Analog sens