P2101-ELECTRONIC THROTTLE CONTROL MOTOR PERFORMANCE





For a complete wiring diagram Refer to Section 8W.


  • When Monitored:

    With the vehicle running, ETC Motor not in Limp Home mode, and the TPS adaptation is complete.

  • Set Condition:

    The PCM recognizes too large of an error between the actual position of the Throttle Plate and the Set Point position. One trip fault and the code will set within 5 seconds. Three good trips to turn off the MIL ETC light is flashing.


Possible Causes
  
THROTTLE BODY ASSEMBLY
  
LOW BATTERY VOLTAGE
  
PCM
  

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



Diagnostic Test

1.ACTIVE DTC

NOTE: When this DTC is Active the engine speed, torque, and vehicle speed are limited to a Limp in mode.

NOTE: Before continuing visually inspect the throttle blade and bore for any obstructions. Icing of the throttle body may have caused this code to set.

NOTE: Low battery voltage can also cause excessive current draw, in very hot and very cold ambient temperature. Make sure the battery can pass a load test before continuing.

NOTE: Diagnose any 5-Volt Supply, Battery, and TP Sensor DTCs before continuing.





Is the DTC Active at this time?

Yes
  • Go To 2


No

2.THROTTLE PLATE INSPECTION






Does the Throttle Plate move?

Yes
  • Go To 3


No
  • Remove the debris if possible or replace the Throttle Body Assembly. Disconnect the Battery when replacing the Throttle Body Assembly. After installation is complete, use a scan tool and select the ETC RELEARN function.
  • Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)

3.THROTTLE POSITION WITHIN 2° DEGREES OF DESIRED THROTTLE POSITION






Is the Actual Throttle Position within 2° degrees of the Desired Throttle Position?

Yes
  • Go To 4


No
  • Replace the Throttle Body Assembly. Disconnect the Battery when replacing the Throttle Body Assembly. After installation is complete, use a scan tool and select the ETC RELEARN function.
  • Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)

4.ETC OPERATION



NOTE: It may be necessary to use a mirror to see the throttle blade.



NOTE: Make sure the motion of the throttle blade is smooth and that it opens and closes.



Did the ETC motor operate properly?

Yes


No
  • Replace the Throttle Body Assembly. Disconnect the Battery when replacing the Throttle Body Assembly. After installation is complete, use a scan tool and select the ETC RELEARN function.
  • Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)