WASHER 6N2005 - Caterpillar

MID 027 CID 0248 FMI 09Conditions Which Generate This Code:
Illustration 1 g01945227
Connections of the Cat data link
This diagnostic code is recorded when the Cat data link is not communicating correctly. For example, actual gear information is not received from other electronic control modules through the Cat data link. This diagnostic code causes the readouts, that are dependent upon the Cat data link information, to indicate abnormal values.
Poor electrical connection at a machine harness connector
The circuit for the Cat data link in the machine harness is shorted to ground.
The circuit for the Cat data link in the machine harness is shorted to the +battery.
The circuit for the Cat data link in the machine harness is open.Test Step 1. CHECK FOR OTHER DIAGNOSTIC CODES.
Check for other diagnostic codes that are related to the Cat data link. Expected Result:There are other diagnostic codes that are showing.Results:
YES - Other diagnostic codes are present.Repair: Exit this procedure and perform the other procedures for the diagnostic codes that are shown.STOP
NO - There are not any other diagnostic codes that are shown. Proceed to Test Step 2.Test Step 2. INSPECT THE HARNESS CONNECTORS.
Turn the disconnect switch to the OFF position.
Inspect the connections for the machine harness that are related to the Cat data link.
Make sure that connectors are clean and tight. Expected Result:The machine harness is correct.Results:
OK - The machine harness is correct. Proceed to Test Step 3.
NOT OK - The machine harness is not correct.Repair: Repair the machine harness or replace the machine harness.STOPTest Step 3. CHECK FOR A SHORT TO GROUND.
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