SEAL 0A4368 - Caterpillar

This procedure covers the following diagnostic code:
Table 1
Diagnostic Trouble Codes
J1939 Code Code Description Comments
5965-5 Aftertreatment #1 DEF Control Module Relay Control : Current Below Normal The Electronic Control Module (ECM) detects an open circuit condition for the Selective Catalytic Reduction (SCR) relay control circuit for at least 2 seconds.
The ECM is not attempting to activate the relay.
The battery voltage is at least 10 V.
The warning lamp will come on.
The ECM detects a short circuit to battery condition for the SCR relay control circuit for at least 0.2 seconds.
The ECM is attempting to activate the relay.
The battery voltage is at least 10 V.
The warning lamp will come on.
5965-6 Aftertreatment #1 DEF Control Module Relay Control : Current Above Normal The ECM detects a high current condition for the SCR relay control circuit for a least 0.05 seconds.
The ECM is attempting to activate the relay.
The warning lamp will come on.
The ECM detects a short circuit to ground condition for the SCR relay control circuit for at least 0.2 seconds.
The ECM is not attempting to activate the relay.
The battery voltage is at least 10 V.
The warning lamp will come on.
5965-7 Aftertreatment #1 DEF Control Module Relay Control : Not Responding Properly The ECM detects that the components connected to the SCR relay are not receiving power.
The SCR relay has been activated.
The battery voltage is at least 10 V.
The warning lamp will come on.
5965-14 Aftertreatment #1 DEF Control Module Relay Control : Special Instruction The ECM detects that the components connected to the SCR relay are still receiving power after the SCR relay has been deactivated.
The battery voltage is at least 10 V.
The warning lamp will come on.
Follow the troubleshooting procedure to identify the root cause of the problem. Note: Some diagnostic codes can only be detected when the SCR relay is not active. These codes will be detected after the keyswitch has been turned to the OFF position and before the ECM main relay removes electrical power from the ECM. These diagnostic codes will be logged the next time that the keyswitch is turned to the ON position.
Illustration 1 g06277409
Schematic diagram for the SCR relay circuit
Illustration 2 g03730037
View of the pin location on the P2 connector for the SCR relay
(20) SCR relay control
Table 2
Troubleshooting Test Steps Values Results
1. Inspect Electrical Connectors and Wiring
A. Check the fuses.
B. Thoroughly inspect the P2/J2 ECM connectors and thoroughly inspect the connector for the SCR relay. Refer to Troubleshooting, "Electrical Connectors - Inspect" for details.
C. Perform a 30 N (6.7 lb) pull test on each of the wires that are associated with the SCR relay.
Damaged wire or connector
Result: A damaged wire or damaged connector was not found. The fuses are OK.
Proceed to Test Step 2.
Result: A damaged wire or damaged connector was found. A fuse is blown.
Repair: Repair the damaged wire or the damaged connector. Replace any blown fuses.
Use the electronic service tool to clear all logged diagnostic codes. Verify that the repair eliminates the fault.
2. Check for Active or Recently Logged Diagnostic Codes
A. Turn the keyswitch to