3857522 Volvo.Penta Cap

Table 1
Diagnostic Codes Table    
Code and Description     Conditions which Generate this Code     System Response    
41-3 8 Volt DC Supply voltage above normal     The digital sensor supply voltage is above normal for one second.
The Electronic Control Module (ECM) has been powered for three seconds.     The code is logged.
All sensors are set to default values.    
41-4 8 Volt DC Supply voltage below normal     The digital sensor supply voltage is below normal for one second.
The ECM has been powered for three seconds.    
100-10 Engine Oil Pressure Sensor abnormal rate of change     The signal voltage has not changed at a normal rate for thirty seconds.
Engine speed must be above 600 rpm.     The code is logged.
The value of the parameter is set to a gauge pressure of
600 kPa (87 psi).    
262-3 5 Volt Sensor DC Power Supply voltage above normal     The analog sensor supply voltage is above normal for one second.
The ECM has been powered for three seconds.     The code is logged.
All sensors are set to default values.    
262-4 5 Volt Sensor DC Power Supply voltage below normal     The analog sensor supply voltage is below normal for one second.
The ECM has been powered for three seconds.    
1785-10 Intake Manifold Pressure Sensor abnormal rate of change     The signal voltage has not changed at a normal rate for thirty seconds.
Engine speed must be above 1000 rpm.     The code is logged.
The value of the parameter will be set to
100 kPa (15 psi).    System OperationThe ECM supplies a regulated voltage of 5.0 0.2 VDC to the following sensors:
Engine oil pressure sensor
Fuel pressure sensor
Intake manifold pressure sensorThe ECM supplies a regulated voltage of 8.0 0.4 VDC to the following sensors:
Coolant level sensor
Coolant level sensor for the aftercooler
Left exhaust temperature sensor
Right exhaust temperature sensorThe supply voltage for the sensors is routed from the ECM to terminal A of each sensor connector. The sensor return for the sensors is routed from the ECM to terminal B of each sensor connector. The ECM provides short circuit protection for the internal power supply. A short circuit to the battery will not damage the internal power supply.If a -10 code is logged, this indicates that the 5 volt supply is not available at the sensor connector. During normal engine operation, each of the signals from the pressure sensors fluctuate slightly. When the 5 volt supply becomes unavailable at the pressure sensor connector, the signal from that sensor floats to a midrange value. The signal will not fluctuate. If the signal from the sensor remains abnormally steady for more than 30 seconds, the ECM will activate this code.Note: The sensors are not protected from overvoltage. A short from the supply line to the +Battery may damage the sensors. If any of the 3 diagnostic codes are active, it is possible that a sensor has been damaged. Repair the sensor supply and check for any active sensor diagnostic codes in order to determine if a sensor has failed.
Illustration 1 g01416473
Schematic for the sensor supply circuitTest Step 1. Inspect the Electrical Connectors and the Wiring
Remove electrical power from the ECM. Turn the keyswitch to the OFF position.
Illustration 2 g01416343
Locations of the connectors for the analog sensors and the digital sensors (rear engine view) (1) Connector for the left exhaust temperature sensor (2) Connector for the right exhaust temperature sensor (3) J2/P2 ECM connectors
Illustration 3 g01416401
Sensor locations (left side engine view) (4) Oil pressure sensor
Illustration 4 g01416415
Sensor locations (top front engine view) (5) Intake manifold pressure sensor (6) Coolant level sensor for the aftercooler (7) Coolant level sensor (8) Fuel pressure sensor
Thoroughly inspect the connectors for sensors (1 through 4). Also, thoroughly inspect connectors (5 through 8) .Refer to Troubleshooting, "Electrical Connectors - Inspect" for details.
Illustration 5 g01416447
Terminal locations at the P2 ECM connector for the sensor supply (P2-14) Digital return (P2-15) Intake manifold pressure (P2-17) Analog return (P2-28) Engine oil pressure (P2-29) Digital sensor supply (P2-39) Right exhaust temperature (P2-40) Fuel pressure (P2-49) Coolant level (P2-65) Left exhaust temperature (P2-72) Analog sensor supply (P2-73) Coolant level sensor for the aftercooler (P2-92) Digital return
Illustration 6 g01159881
Terminal locations at the sensor connector for the sensor supply (Terminal A) Sensor supply (Terminal B) Sensor return (Terminal C) Sensor signal
Perform a 45 N (10 lb) pull test on each of the wires in the ECM connectors that are associated with the circuit.
Check the allen head screw for each of the ECM connectors for the proper torque. Refer to Troubleshooting, "Electrical Connectors - Inspect" for details.
Check the harness and wiring for abrasion and for pinch points from the sensors back to the ECM.Expected Result:All connectors, pins and sockets are completely coupled and/or inserted and the harness and wiring are free of corrosion, of abrasion and of pinch points.Results:
OK - The harness and connectors appear to be OK. Proceed to Test Step 2.
Not OK - There is a problem with the connectors and/or wiring.Repair: Repair the connectors or wiring and/or replace the connectors or wiring. Ensure that all of the seals are properly in place and ensure that the connectors are completely coupled.Verify that the repair eliminates the problem.STOPTest Step 2. Check for Active Diagnostic Codes
Connect Caterpillar Electronic Technician (ET) to the service tool connector.