CONNECTOR 0308194 - Caterpillar

System Operation Description:Use this procedure to troubleshoot the electrical system if a problem is suspected with the Cat Data Link or if any one of the diagnostic codes in Table 1 is active or easily repeated.
Table 1
Diagnostic Codes Table    
Code and Description    Conditions which Generate this Code    System Response    
1632-9 Backup Engine Control Module abnormal update rate     Communication with the backup Electronic Control Module (ECM) cannot be established within three seconds after the Primary ECM is powered up. After communication with the backup ECM has been established, communication stops for one second.     The ECM will log the diagnostic code. The backup ECM will not be available for engine control.    Note: This procedure checks for an open circuit or for a short circuit in the Cat Data Link. If you are experiencing problems with communications between the Caterpillar Electronic Technician (ET) and the Electronic Control Module (ECM), refer to Troubleshooting, "Electronic Service Tool Does Not Communicate" before you use this procedure.The Cat Data Link is the standard data link that is used by the ECM to communicate with Cat ET. The ECM communicates with Cat ET in order to share status information and diagnostic information. Cat ET can also be used to configure the ECM parameters. This information will not be available if communication fails between the ECM and Cat ET.
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Schematic for the Cat Data LinkTest Step 1. Inspect the Electrical Connectors and the Wiring
Remove electrical power from the ECM.
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Connector locations for the CAT data link (rear engine view) (1) P1 ECM connector (2) Customer Connector
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Connector locations for the CAT data link (top rear engine view) (2) Customer Connector (3) Service tool connector
Thoroughly inspect connectors (1), (2), and (3). Refer to Troubleshooting, "Electrical Connectors - Inspect".
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Terminal locations at the P1 ECM connector that are associated with the Cat Data Link (P1-8) Cat Data Link + (P1-9) Cat Data Link −
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Terminal locations at the Customer Connector that are associated with the Cat Data Link (Terminal 6) Cat Data Link − (Terminal 7) Cat Data Link +
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Terminal locations at the service tool connector that are associated with the Cat Data Link (D) Cat Data Link + (E) Cat Data Link −
Perform a 45 N (10 lb) pull test on each of the wires that are associated with the Cat Data Link.
Check the allen head screw on each ECM connector for the proper torque. Also, check the allen head screw on the customer connector for the proper torque. Refer to Troubleshooting, "Electrical Connectors - Inspect" for the correct torque values.Expected Result:All connectors, pins, and sockets are completely inserted and coupled. The harness and wiring are free of corrosion, of abrasion, and of pinch points.Results:
OK - The harness and the connectors appear to be OK. Proceed to Test Step 2.
Not OK - The connectors and/or the wiring are not OK.Repair: Repair the connectors and/or the wiring. Replace parts, if necessary. Ensure that all of the seals are properly in place