3097146 Volvo.Penta Valve body

Table 1
Diagnostic Codes
CDL Code and Description Conditions which Generate this Code System Response
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 3 seconds. The code is logged.
All sensors are set to default values.
Dosing is disabled until the problem is correct.
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 3 seconds.
2131-3
5 Volt Sensor DC Power Supply #2:Voltage Above Normal The analog sensor supply voltage is above normal for one second.
The ECM has been powered for 3 seconds.
2131-4
5 Volt Sensor DC Power Supply #2:Voltage Below Normal The analog sensor supply voltage is below normal for one second.
The ECM has been powered for 3 seconds. System OperationThe ECM supplies a regulated voltage of 5.0 0.2 VDC to the sensors.The supply voltage for the analog sensors is routed from the ECM to terminal 1 of each sensor connector. The analog sensor return for the sensors is routed from the ECM to terminal 2 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.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 g03323714
Schematic for the sensor supply circuit
Test Step 1. Inspect the Electrical Connectors and the Wiring
Remove electrical power from the ECM. Turn the keyswitch to the OFF position.
Thoroughly inspect all connectors for the analog sensor circuit. Refer to Troubleshooting, "Electrical Connectors - Inspect" for details.
Illustration 2 g01422120
Sensor connector
(1) Analog sensor supply
(2) Analog sensor return
(3) 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.
Restore electrical power to the ECM.
Monitor the active diagnostic code screen on Cat ET. Check and record any active diagnostic codes. Look for the following diagnostic codes:
262-3
262-4
2131-3
2131-4Note: Wait at least 30 seconds in order for the diagnostic codes to become active.Expected Result:No diagnostic codes are active.Results:
OK - No diagnostic code is active.Repair: The problem is no longer present. If the problem is intermittent, refer to Troubleshooting, "Electrical Connectors - Inspect".STOP
Not OK - A diagnostic code is active at this time. There is a problem with the sensor supply for the analog sensors. Proceed to Test Step 3.Test Step 3. Disconnect the Analog Sensors while you Monitor the Active Diagnostic Codes
Ensure that the ECM is receiving electrical power.
Monitor the active diagnostic code screen on Cat ET while you disconnect each 5 V sensor at the sensor connector. Disconnect all of the sensors on the supply, one at a time.Note: Wait at least 30 seconds in order for the diagnostic codes to become active.Check for an active sensor supply code.Expected Result:The diagnostic code deactivates when a particular sensor is disconnected.Results:
OK - The diagnostic code deactivates when a particular sensor is disconnected.Repair: Connect the suspect sensor. If the code returns, replace the sensor. Connect the connectors. Verify that the problem is resolved.STOP
Not OK - The diagnostic code remains active after the sensors are disconnected. Leave the sensors disconnected. The sensors are not the cause of the diagnostic code. Proceed to Test Step 4.Test Step 4. Check the Analog Supply Voltages at the ECM
Disconnect the J2/P2 ECM connector.
Fabricate two jumper wires that are long enough to be used to create a test circuit at the ECM connector. Crimp connector sockets to one end of each of the jumper wires.
Remove the wires from terminal locations P2-72 (analog sensor supply) and P2-17 (analog sensor return). Install a jumper wire into each of these terminal locations.
Connect the J2/P2 ECM connector.
Restore electrical power to the engine ECM.
Measure the voltage between the jumper wire in P2-72 (analog sensor supply) and the jumper wire in P2-17 (analog sensor return).
Remove electrical power from the ECM. Expected Result:Each voltage measurement is 5.0 0.2 VDC.Results:
OK - The voltage measurement is 5.0 0.2 VDC. The ECM is operating correctly.Repair: The supply wire is shorted to another wire in the harness or the supply wire is shorted to engine ground. There may be an open circuit in the supply wire that is in the harness. Repair the supply wire.STOP
Not OK - The voltage measurement is not 5.0 0.2 VDC.Repair: The ECM is not generating the correct supply voltage. There is a problem with the ECM. Replace the ECM. Refer to Troubleshooting, "ECM - Replace".STOP