HEAT EXCHANGER 3648250 - Caterpillar

Illustration 1 g01819260
Schematic of the Cat Data Link
This diagnostic code is recorded when the "Chassis" electronic control module ("Chassis ECM") receives information from the "Transmission ECM" and this information is not correct.Note: Other related diagnostic codes may cause this diagnostic code. Check for other related diagnostic codes.System Response:Information for the "Transmission ECM" is not available over the Cat Data Link. The operation of the hoist system is degraded. The starter protection function is disabled.Test Step 1. CHECK FOR ADDITIONAL RELATED DIAGNOSTIC CODES
Ensure that all electronic control modules that use the Cat Data Link are connected.
Turn the disconnect switch and the key start switch to the ON position.
Acknowledge any diagnostic codes that are currently displayed on the message center.
Verify that no related diagnostic codes are present.Expected Result:No other diagnostic codes are present.Results:
OK - No other related diagnostic codes are present. Proceed to Test Step 4.
NOT OK - Other related diagnostic codes are present.Repair: Exit this procedure and perform the other related diagnostic codes. Verify that the other related diagnostic codes are NOT present. Observe the status of the CID 296 FMI 2. If the CID 296 FMI 2 remains, perform the diagnostic code procedure again.STOPTest Step 2. VERIFY THE HARDWARE AND THE SOFTWARE PART NUMBERS
Verify whether the following part numbers are correct.
Software part number for the "Chassis ECM".
Software part number for the monitoring system.Expected Result:Consult SISWeb for the correct configuration for the machine.Results:
OK - All part numbers are correct. Proceed to Test Step 3.
NOT OK - All of the part number are not correct.Repair: One of the following modules may have the wrong part number and/or the software configuration is not correct. Refer to the Testing and Adjusting, "Electronic Control Module (ECM) - Flash Program" Section of this manual for details.STOPTest Step 3. INSPECT THE HARNESS CONNECTIONS
Turn the key start switch and the disconnect switch to the OFF position.
Inspect the harness connections that are related to the Cat Data Link. Make sure that the connectors are clean and tight.
Check the mating of the connector.
Check the wires at the connector.
Check each wire for nicks and/or signs of abrasion in the insulation.
Check for moisture at the connector.
Check for dirty contacts and/or corroded contacts.
Check each pin and check each socket.Expected Result:The machine harness connectors are tight and free of corrosion.Results:
OK - The machine harness connectors are tight and the connectors are free of corrosion. Proceed to Test Step 4.
NOT OK - The machine harness connectors require repair.Repair: Repair the harness or replace the harness.STOPTest Step 4. CHECK FOR SHORTS TO GROUND
Turn the disconnect switch and the key start switch to the OFF position.
Disconnect the machine harness from all electronic control modules that use the Cat Data Link.
At the machine harness for the "Chassis ECM", measure the resistance between frame ground and the following data link circuits:
Contact J1-20 (wire 892-BR(Brown)) and contact J1-10 (wire 893-GN(Green))Expected Result:The resistance is greater than 5000 ohms.Results:
OK - The resistance is greater than 5000 ohms. The harness circuit is correct. Proceed to Test Step 5.
NOT OK - The resistance