HOSE AS 2201650 - Caterpillar

Illustration 1 g01220777
Schematic of the Cat Data LinkThis failure results in events that are logged against an ECM that can not be explained. The Power Train ECM cannot communicate with the Engine ECM or the Power Train ECM appears to work intermittently. Note: The following test procedure may create other diagnostic codes. Ignore these diagnostic codes and clear the diagnostic codes when the original diagnostic code has been corrected. Ensure that the diagnostic code of CID 0590 FMI 02 is active before performing this procedure.Test Step 1. VERIFY THE HARDWARE AND THE SOFTWARE PART NUMBERS
Verify that the following information is correct:
The part number of the software of the Power Train ECM.
The part number of the Power Train ECM.
The part number of the Engine ECM. Note: Consult your Caterpillar dealer for the correct part numbers of the flash software.Expected Result:All part numbers are correct. Results:
YES - All part numbers are correct. Proceed to Test Step 2.
NO - All part numbers are not correct. The part number of the Power Train ECM may be incorrect. The part number of the Engine ECM may be incorrect. The incorrect software may be installed. Repair: Replace the incorrect ECM with an ECM that has the correct part number. Install the correct software. Refer to Troubleshooting, Testing and Adjusting, "Electronic Control Module (ECM) - Replace" and Troubleshooting, Testing and Adjusting, "Electronic Control Module (ECM) - Flash Program".STOPTest Step 2. INSPECT THE HARNESS CONNECTIONS
Turn the disconnect switch and key start switch to the OFF position.
Inspect all harness connections that are related to the Cat Data Link. Make sure that the connectors are clean and tight.
Check the connectors for proper mating.
Check the wires at the connector.
Check each wire for nicks or signs of abrasion in the insulation.
Check for moisture at the connector.
Check the connectors for dirty contacts or corroded contacts.
Check each pin and each socket of the machine harness connectors. Expected Result:The machine harness connectors are tight and free of corrosion. Results:
YES - The machine harness connectors are tight and free of corrosion. Proceed to Test Step 3.
NO - The machine harness connectors are in need of repair.Repair: Repair the machine harness or replace the machine harness. STOPTest Step 3. CHECK FOR SHORTS TO GROUND
The disconnect switch and key start switch remain in the OFF position.
Disconnect the machine harness from all electronic control modules that use the Cat Data Link.
At the machine harness for the Power Train ECM, measure the resistance between frame ground and connector contact J1-10 (wire 893-GN). Measure the resistance between frame ground and connector contact and J1-20 (wire 892-BR).Expected Result:The resistance is greater than 5 ohms. Results:
YES - The resistance is greater than 5 ohms. The harness circuit resistance is correct. Proceed to Test Step 4.
NO - The resistance is less than 5 ohms. The machine harness has failed. Repair: There is a short between frame ground and the Cat Data Link circuit in the machine harness. Repair the machine harness or replace the machine harness. STOPTest Step 4. CHECK FOR A