P2101
SYMPTOMP2101-ELECTRONIC THROTTLE CONTROL MOTOR PERFORMANCE
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. Scan Tool Testing and Procedures
DIAGNOSTIC TEST
1. ACTIVE DTC
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 ambients. Make sure the battery can pass a Load test before continuing.
Note: Diagnose any 5-Volt Supply, Battery, and TP Sensor DTCs before continuing. Ignition on, engine not running. With a scan tool, read DTCs.
Does the DTC active at this time?
Yes>> Go To 2
No>> Perform (NGC) POWERTRAIN VERIFICATION TEST VER-5. Powertrain Verification Test - Ver 5
2. THROTTLE PLATE INSPECTION
Turn the ignition off.
Remove the Air Cleaner Assembly from the Throttle Body.
Check for any signs of a foreign material (ice or dirt) on the Throttle Plate or in the bore causing the Throttle Plate to stick.
Manually open and close the throttle plate using your hands.
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 (NGC) POWERTRAIN VERIFICATION TEST VER-5.
3. THROTTLE POSITION WITHIN 2° DEGREES OF DESIRED THROTTLE POSITION
Start the engine.
Allow the engine to reach normal operating temperature.
With a scan tool, monitor the Actual Throttle Position and Desired Throttle Position.
Compare the Actual Throttle Position and the Set Point 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 (NGC) POWERTRAIN VERIFICATION TEST VER-5.
4. ETC OPERATION
Ignition on, engine not running.
With a scan tool, actuate the Electronic Throttle Control Motor.
Note: It may be necessary to use a mirror to see the throttle blade. Observe 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>> Perform (NGC) POWERTRAIN VERIFICATION TEST VER-5.
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 (NGC) POWERTRAIN VERIFICATION TEST VER-5.