CYLINDER BLOCK GP 2W0294 - Caterpillar

Illustration 1 g03365659An abnormal update rate on the proprietary CAN data-link will cause this diagnostic code.Following are the causes of this diagnostic code:
Failed propitiatory CAN data-link
Failed propitiatory CAN data-link device
Incorrectly connected connectorTest Step 1. INSPECT THE HARNESS
Turn the key start switch to the OFF position.
Turn the battery disconnect switch to the OFF position.
Inspect the harness for the following:
Inspect the connectors, pins, and sockets for the following:
Cleanliness
Security
Proper mating
Seal condition
Moisture
Corrosion
Inspect the wires at the connector for the following:
Security
Nicks
AbrasionNote: Take care not to pull the wire out of the connector.
Inspect the harness for the following:
Damage
Abrasion
KinksExpected Result:The harness is in good condition.Results:
YES - The harness is in good condition. Proceed to Test Step 2
NO - The harness is not in good condition.Repair: Repair or replace the harness. STOPTest Step 2. CHECK IF THE DIAGNOSTIC CODE REMAINS
Connect the Cat® ET service tool to the service tool connector.
Turn the battery disconnect switch to the ON position.
Turn the key start switch to the ON position.
Check Cat ET for an active diagnostic code of CID 0246 - FMI 09. Expected Result:CID 0246 - FMI 09 is not active.Results:
YES - CID 0246 - FMI 09 is not active.Repair: Reset the system and troubleshoot any active diagnostic codes.STOP
NO - CID 0246 - FMI 09 is active. Proceed to Test Step 3.Test Step 3. CHECK THE HARNESS RESISTANCE
Turn the key start switch to the OFF position.
Disconnect the harness fro the ECM.
Disconnect Cat ET from the service tool connector.
Disconnect the attachment connector.
Measure the resistance between pins 34 and 50 of the ECM connector . Expected Result:The resistance should be less than 5 ohms.Results:
YES - The resistance is less than 5 ohms. Proceed to Test Step 4.
NO - The resistance is greater than 5 ohms.Repair: Repair or replace the harness.STOPTest Step 4. CHECK THE CAN DATA-LINK FOR A SHORT
Turn the key start switch to the OFF position.
Disconnect the harness from the ECM.
Disconnect Cat ET from the service tool connector.
Disconnect the attachment connector.
Measure the resistance at the attachment connector between:
Pin 34 and frame ground
Pin 50 and frame ground Expected Result:The resistance should be greater than 5 ohms.Results:
YES - The resistance is greater than 5 ohms.Repair: Reset the system and troubleshoot any active diagnostic codes. If the original condition still exists, the problem may be in an attached device. See the manual for the device in question.STOP
NO - The resistance is less than 5 ohms. The data-link is shorted.Repair: Repair or replace the harness.STOP