P0048-TURBOCHARGER BOOST CONTROL CIRCUIT SHORT CIRCUIT





For a complete wiring diagram Refer to Section 8W


  • When Monitored:

    With the ignition on and the Boost Pressure Servo Motor command on.

  • Set Condition:

    The Engine Control Module (ECM) detects that the (X653) Boost Pressure Servo Motor Control circuit is shorted to voltage for 2.0 seconds.


Possible Causes
  
(X635) BOOST PRESSURE SOLENOID CONTROL CIRCUIT SHORTED TO VOLTAGE
  
(X635) BOOST PRESSURE SOLENOID CONTROL CIRCUIT SHORTED TO THE (K347) FUSED ASD RELAY OUTPUT CIRCUIT
  
BOOST PRESSURE SOLENOID
  
ENGINE CONTROL MODULE (ECM)
  

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING)



Diagnostic Test

1.DTC IS ACTIVE







Is the status Active for this DTC?

Yes
  • Go To 2


No

2.(X635) BOOST PRESSURE SOLENOID CONTROL CIRCUIT SHORTED TO VOLTAGE











Is there any voltage present?

Yes


No
  • Go to 3

3.(X653) BOOST PRESSURE SOLENOID CONTROL CIRCUIT SHORTED TO THE (K343) FUSED ASD RELAY OUTPUT CIRCUIT






Is the resistance above 1000 ohms?

Yes
  • Go to 4


No

4.BOOST PRESSURE SOLENOID









NOTE: The test light should be illuminated and bright. Compare the brightness to that of a direct connection to the battery.


NOTE: The circuit will remain actuated by the controller for 30 seconds. Be certain the actuation is active when checking the circuit.




NOTE: The test light should not be illuminated.


NOTE: The circuit will remain actuated by the controller for 30 seconds. Be certain the actuation is active when checking the circuit.



Is the test light illuminated and bright with the actuation at 100% and not illuminated with the actuation at 0%?

Yes


No
  • Go to 5

5.ENGINE CONTROL MODULE (ECM)






Were any problems found?

Yes


No