The CID 0590 failure means that the engines' Electronic Control Module (ECM) has stopped responding to the periodic requests for information from the GSC+P.
Test Step 1. CHECK THE CAT DATA LINK
- Turn the Engine Control Switch (ECS) to OFF/RESET position.
- Disconnect the pins 19 and 20 of the CAT data link from the GSC+P.
- Disconnect the pins 13 and 14 of the CAT data link from the ECM.
- Measure the resistance between pin 19 of the GSC+P and pin 14 of the ECM.
- Measure the resistance between pin 20 of the GSC+P and pin 13 of the ECM.
Expected Result:
The resistance for both measurements is less than 5 ohms.
Results:
- OK - The resistance for both measurements is less than 5 ohms. The circuit is correct. The ECM has failed.
Repair: It is unlikely that the ECM has failed. Clear the diagnostic code from the fault log after troubleshooting is complete. The GSC+P is usually programmed to treat a CID 590 diagnostic code as an "alarm fault". Setpoint P04 is 0. If the GSC+P is programmed to treat this code as a shutdown fault, setpoint P04 is 1. Then, it is not necessary to press the "alarm codes" key in order to see the diagnostic code. The diagnostic code is automatically shown on the upper display.
STOP
- NOT OK - The resistance for both measurements is greater than 5 ohms. The circuit is not correct.
Repair: Repair the wiring of the CAT data link or replace the wiring of the CAT data link.Clear the diagnostic code from the fault log after troubleshooting is complete. The GSC+P is usually programmed to treat a CID 590 diagnostic code as an "alarm fault". Setpoint P04 is 0. If the GSC is programmed to treat this code as a shutdown fault, setpoint P04 is 1. Then, it is not necessary to press the "alarm codes" key in order to see the diagnostic code. The diagnostic code is automatically shown on the upper display.
STOP