KIT-SEAL 3980167 - Caterpillar

Table 1
Diagnostic Codes Table    
Description    Conditions which Generate this Code    System Response    
296-9 Transmission Control : Abnormal Update Rate     The engine Electronic Control Module (ECM) detects a failure in the Cat Data Link. The ECM detects a loss of communication with the transmission ECM.     The code is logged.    
800-9 VIMS Main Module : Abnormal Update Rate     The ECM detects a failure in the Cat Data Link. The VIMS main module has failed.    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 Caterpillar Electronic Technician (ET) and the 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.The ECM communicates with other controls in order to communicate the engine operating status. The ECM communicates with the power train in order to perform machine functions. The following control modules may be used in your application: Engine ECM, VIMS Module, RAC Module and Transmission Control.
Illustration 1 g02561125
SchematicTest Step 1. Inspect the Electrical Connectors and the Wiring
Turn the keyswitch to the OFF position.
Illustration 2 g01234146
Location of ECM connectors
Thoroughly inspect the ECM connectors J1/P1 and J2/P2. Inspect all of the connectors to other modules on the Cat Data Link. Refer to the diagnostic functional test Troubleshooting, "Electrical Connectors - Inspect" for details.
Illustration 3 g01312112
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 −
Illustration 4 g01381884
Service tool connector (Terminal A) Power for Cat ET (Terminal B) Return for Cat ET (Terminal D) Cat Data Link + (Terminal E) Cat Data Link −
Perform a 45 N (10 lb) pull test on each of the wires in the ECM connector that are associated with the circuit.
Check the ECM connector (allen head screw) for the proper torque. Refer to Troubleshooting, "Electrical Connectors - Inspect" for details.
Check the harness and the wiring for abrasion and for pinch points.Expected Result:All of the connectors, pins, and sockets are coupled and/or inserted. 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 - The connectors and/or wiring are not OK.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 coupled.Verify that the repair eliminates the problem.STOPTest Step 2. Check for Shorts in the Harness
Disconnect ECM connector J1/P1 at the engine ECM.
Disconnect all control modules from the Cat Data Link.
Disconnect Cat ET from the service tool connector.
Measure the resistance from P1-8 to every terminal on ECM connectors P1