P2110-ELECTRONIC THROTTLE CONTROL - FORCED LIMITED RPM





For a complete wiring diagram Refer to Section 8W.


  • When Monitored:

    Ignition on and ETC motor is working.

  • Set Condition:

    When the PCM requests to limit engine speed if PWM is too high for 20.5 seconds and before P2118 sets. One trip fault and the code will set within 5 seconds. ETC light is illuminated.


Possible Causes
  
THROTTLE PLATE STUCK
  
(K124) ETC POSITIVE CIRCUIT OPEN
  
(K126) ETC NEGATIVE CIRCUIT OPEN
  
(K124) ETC POSITIVE CIRCUIT SHORTED TO GROUND
  
(K126) ETC NEGATIVE CIRCUIT SHORTED TO GROUND
  
ETC MOTOR
  
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: Diagnose any TP Sensor faults, 5-Volt Supply faults, and Battery Voltage High or Low DTCs before continuing.



Is the DTC Active at this time?

Yes
  • Go To 2


No

2.THROTTLE PLATE STUCK






Does the Throttle Plate move?

Yes
  • Go To 3


No
  • Remove the debris if possible or replace the Throttle Body Assembly if signs of physical damage are present. 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.(K124) ETC POSITIVE CIRCUIT OPEN






CAUTION: Do not probe the PCM harness connectors. Probing the PCM harness connectors will damage the PCM terminals resulting in poor terminal to pin connection. Install Miller Special Tool #8815 to perform diagnosis.




Is the resistance below 5.0 ohms?

Yes
  • Go To 4


No

4.(K126) ETC NEGATIVE CIRCUIT OPEN





Is the resistance below 5.0 ohms?

Yes
  • Go To 5


No

5.(K124) ETC POSITIVE CIRCUIT SHORTED TO GROUND





Is the resistance below 100 ohms?

Yes


No
  • Go To 6

6.(K126) ETC NEGATIVE CIRCUIT SHORTED TO GROUND





Is the resistance below 100 ohms?

Yes


No
  • Go To 7

7.ETC MOTOR


NOTE: Take the following measurement using special tool #8815 to avoid possible damage to the Throttle Body harness connector.




Is the resistance between 2.5 and 25 ohms at closed throttle?

Yes
  • Go To 8


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)

8.PCM

NOTE: Before continuing, check the PCM harness connector terminals for corrosion, damage, or terminal push out. Repair as necessary.




Were there any problems found?

Yes


No