3C8190 CABLE AS Caterpillar parts
Rating:
Alternative (cross code) number:
CA3C8190
3C-8190
3C8190
CA3C8190
3C-8190
3C8190
Weight: 0.25 pounds 0 kg.
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Information:
- When a particular sensor is disconnected, the -4 code disappears.Repair: Perform the following procedure:
Carefully inspect the sensor connector and the harness connector for the sensor. Look for these problems:
Moisture on the connectors or the wiring
Damage that is caused by excessive heat
Damage that is caused by chafing
Damaged insulationRepair any problems. Replace parts, if necessary. Connect the sensor. Replace the sensor if you connect the sensor and the -4 code returns. Verify that the problem is resolved.STOP
No - All of the applicable sensors are disconnected. The -4 code is still active. Proceed to Test Step 9.Test Step 9. Check the P2 ConnectorNote: Numerous diagnostic codes will become active when you disconnect the P2 connector. Ignore the additional codes and clear the codes when you are finished.
Disconnect the P2 connector.
Carefully inspect the four P2 sockets that relate to the 5 volt supply. Each socket must be clean and dry. Clean the sockets, if necessary.
Insert a pin into each socket that relates to the 5 volt supply. Verify that each socket grips the pin firmly. Repair any problems.
Look for the active code to disappear while the P2 connector is disconnected.Expected Result:The active code disappears while the P2 connector is disconnected.Results:
Yes - The active code disappears while the P2 connector is disconnected. The harness is causing the active diagnostic code.Repair: Connect the P2 connector and verify that the code returns.Repair the harness. Replace parts, if necessary. Verify that the problem is resolved.STOP
No - The code remains active while the P2 connector is disconnected.Repair: Temporarily install a test ECM. Refer to Troubleshooting, "Test ECM Mode". Verify that the test ECM solves the problem. Replace the original ECM. Verify that the problem is resolved.STOPTest Step 10. Wiggle the Wiring and Look for ProblemsCarefully following this procedure is a good way to identify the root cause of an intermittent problem.
Configure Cat ET for the wiggle test. Start the wiggle test.Note: Problems with the circuit must exist for at least one second before a diagnostic code for the 5 volt supply becomes active.
Slowly wiggle all of the wiring and the connectors between the P1 connector and the coolant level sensor. Pay particular attention to the wiring near each connector. As you wiggle the wiring, observe the wiring and the connectors. Look for these problems:
Loose connectors or damaged connectors
Moisture on the connectors or the wiring
Damage that is caused by excessive heat
Damage that is caused by chafing
Improper routing of wiring
Damaged insulationExpected Result:A "5 Volt Supply" diagnostic code becomes active when the wiring is wiggled.Results:
Yes - A "5 Volt Supply" diagnostic code becomes active when the wiring is wiggled.Repair: Repair the wiring, when possible. Replace parts, if necessary. Verify that the problem is resolved.STOP
No - A "5 Volt Supply" diagnostic code does not become active when the wiring is wiggled.Repair: There may be a problem with the P1 connector. Perform the following procedure:
Turn the keyswitch to the OFF position.
Pull on the power wire at the back of the P1 connector in order to verify that the crimp is OK
Carefully inspect the sensor connector and the harness connector for the sensor. Look for these problems:
Moisture on the connectors or the wiring
Damage that is caused by excessive heat
Damage that is caused by chafing
Damaged insulationRepair any problems. Replace parts, if necessary. Connect the sensor. Replace the sensor if you connect the sensor and the -4 code returns. Verify that the problem is resolved.STOP
No - All of the applicable sensors are disconnected. The -4 code is still active. Proceed to Test Step 9.Test Step 9. Check the P2 ConnectorNote: Numerous diagnostic codes will become active when you disconnect the P2 connector. Ignore the additional codes and clear the codes when you are finished.
Disconnect the P2 connector.
Carefully inspect the four P2 sockets that relate to the 5 volt supply. Each socket must be clean and dry. Clean the sockets, if necessary.
Insert a pin into each socket that relates to the 5 volt supply. Verify that each socket grips the pin firmly. Repair any problems.
Look for the active code to disappear while the P2 connector is disconnected.Expected Result:The active code disappears while the P2 connector is disconnected.Results:
Yes - The active code disappears while the P2 connector is disconnected. The harness is causing the active diagnostic code.Repair: Connect the P2 connector and verify that the code returns.Repair the harness. Replace parts, if necessary. Verify that the problem is resolved.STOP
No - The code remains active while the P2 connector is disconnected.Repair: Temporarily install a test ECM. Refer to Troubleshooting, "Test ECM Mode". Verify that the test ECM solves the problem. Replace the original ECM. Verify that the problem is resolved.STOPTest Step 10. Wiggle the Wiring and Look for ProblemsCarefully following this procedure is a good way to identify the root cause of an intermittent problem.
Configure Cat ET for the wiggle test. Start the wiggle test.Note: Problems with the circuit must exist for at least one second before a diagnostic code for the 5 volt supply becomes active.
Slowly wiggle all of the wiring and the connectors between the P1 connector and the coolant level sensor. Pay particular attention to the wiring near each connector. As you wiggle the wiring, observe the wiring and the connectors. Look for these problems:
Loose connectors or damaged connectors
Moisture on the connectors or the wiring
Damage that is caused by excessive heat
Damage that is caused by chafing
Improper routing of wiring
Damaged insulationExpected Result:A "5 Volt Supply" diagnostic code becomes active when the wiring is wiggled.Results:
Yes - A "5 Volt Supply" diagnostic code becomes active when the wiring is wiggled.Repair: Repair the wiring, when possible. Replace parts, if necessary. Verify that the problem is resolved.STOP
No - A "5 Volt Supply" diagnostic code does not become active when the wiring is wiggled.Repair: There may be a problem with the P1 connector. Perform the following procedure:
Turn the keyswitch to the OFF position.
Pull on the power wire at the back of the P1 connector in order to verify that the crimp is OK