STEP GP 2234477 - Caterpillar

Illustration 4 g01806873
Wastegate regulator
(1) Wastegate regulator Test Step 1. Check for Diagnostic Codes
Turn the keyswitch to the OFF position.
Connect the electronic service tool to the diagnostic connector.
Turn the keyswitch to the ON position. Start the electronic service tool.
Monitor the electronic service tool for active diagnostic codes and/or logged diagnostic codes. Expected Result:One or more diagnostic codes are active or logged.Results:
526-xx diagnostic codes are active and/or logged - Proceed to Test Step 2.
No Codes - The fault seems to be resolved.Repair: For intermittent faults, refer to Troubleshooting, "Electrical Connectors - Inspect".STOPTest Step 2. Inspect Electrical Connectors and Wiring
Thoroughly inspect the P2/J2 ECM connector and the P511 connector for the wastegate regulator. Refer to Troubleshooting, "Electrical Connectors - Inspect" for details.
Perform a 45 N (10 lb) pull test on each of the wires that are associated with the wastegate solenoid.
Check the screw for the ECM connector for the correct torque of 5.0 N m (44 lb in). Expected Result:All connectors, pins, and sockets are completely coupled and/or inserted and the harness is free of corrosion, abrasion, and pinch points.Results:
OK - The harness is OK. Proceed to Test Step 3.
Not OK - There is a fault in the connectors and/or the harness.Repair: Repair the connectors or the harness and/or replace the connectors or the harness. Ensure that all of the seals are correctly in place and ensure that the connectors are completely coupled.Use the electronic service tool in order to clear all logged diagnostic codes and then verify that the repair eliminates the fault.STOPTest Step 3. Determine the Diagnostic Code that is Active
Turn the keyswitch to the ON position. Access the "Diagnostics Tests" on the electronic service tool. Activate the "Turbo Wastegate Solenoid Test". Wait at least 30 seconds in order for the result to be displayed.
Determine if the fault is related to either of the following:
"Low current" (open circuit)
"High current" (short circuit)Expected Result:The electronic service tool displays no diagnostic codes.Results:
OK - There are no active codes.Repair: The original codes may have been caused by a loose connector. If this is an intermittent fault, refer to Troubleshooting, "Electrical Connectors - Inspect".STOP
Not OK