P2111-ELECTRONIC THROTTLE CONTROL - UNABLE TO CLOSE
For a complete wiring diagram Refer to Section 8W.
- When Monitored:
Ignition on and battery voltage greater than 10 volts.
- Set Condition:
Just after key on, the throttle is opened and closed to test the system. If the PCM detects that the TP Sensor does not return to Limp Home Position, this DTC will set. One trip fault. The DTC will set within 5 seconds. ETC light is flashing.
| Possible Causes |
| INTERMITTENT DTC |
| THROTTLE PLATE STICKING OR OBSTRUCTED |
| TP SENSOR CIRCUIT(S) HIGH RESISTANCE OR SHORTED |
| (K124) ETC MOTOR (+) CIRCUIT SHORTED TO VOLTAGE |
| (K126) ETC MOTOR (-) CIRCUIT SHORTED TO VOLTAGE |
| (K124) ETC MOTOR (+) CIRCUIT SHORTED TO THE (K126) ETC MOTOR (-) CIRCUIT |
| (K124) ETC MOTOR (+) CIRCUIT OPEN OR HIGH RESISTANCE |
| (K126) ETC MOTOR (-) CIRCUIT OPEN OR HIGH RESISTANCE |
| (K124) ETC MOTOR (+) CIRCUIT SHORTED TO GROUND |
| (K126) ETC MOTOR (-) CIRCUIT SHORTED TO GROUND |
| THROTTLE BODY ASSEMBLY |
| PCM |
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE - STANDARD PROCEDURE).
Diagnostic Test
1. ACTIVE DTCNOTE: Diagnose any TP Sensor or 5 Volt Supply DTCs before continuing.
NOTE: Maximum engine speed could be reduced while this fault is active, based on where the throttle plate is stuck.
NOTE: The PCM tests the ETC Motor by opening and closing the throttle plate before starting the engine. If the throttle plate does not return to the closed position this DTC will set.
Start the engine and allow it to reach normal operating temperature.
WARNING: When the engine is operating, do not stand in direct line with the fan. Do not put your hands near the pulleys, belts, or fan. Do not wear loose clothing. Failure to follow these instructions can result in personal injury or death.
With the scan tool, select View DTCs.
Is the status Active for this DTC?
Yes
- Go to 2
No
- Refer to the *CHECKING FOR AN INTERMITTENT DTC Diagnostic Procedure. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING)
2. THROTTLE PLATE INSPECTION
Turn the ignition off.
Remove the air cleaner assembly.
Check for any signs of a foreign material (ice or dirt) on the throttle plate or in the throttle bore that can cause the throttle plate to stick or not fully close.
Attempt to manually open the throttle plate and allow it to close. Use an appropriate tool that will not damage or mar the throttle body.
Were any problems found?
Yes
- Repair as necessary 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 PCM Verification Test Ver. 1 (Refer to 9 - ENGINE - STANDARD PROCEDURE).
No
- Go to 3
3. TP SENSOR NO.1 AND TP SENSOR No. 2 BOTH EQUAL 2.5 VOLTS
With a scan tool, perform the Throttle Follower test and monitor both TP Sensor voltages.
Are both TP Sensor readings stuck at 2.5 volts?
Yes
- Check the TP Sensor Signal circuits for excessive resistance, being shorted together, or shorted to the Sensor Ground circuit.
- Perform the PCM Verification Test Ver. 1 (Refer to 9 - ENGINE - STANDARD PROCEDURE).
No
- Go to 4
4. (K124) ETC MOTOR (+) CIRCUIT SHORTED TO VOLTAGE
Turn the ignition off.
Disconnect the Throttle Body harness connector.
Disconnect the PCM harness connectors.
Turn the ignition on.
Measure the voltage of the (K124) ETC Motor (+) circuit.
Is there any voltage present?
Yes
- Repair the (K124) ETC Motor (+) circuit for a short to voltage.
- Perform the PCM Verification Test Ver. 1 (Refer to 9 - ENGINE - STANDARD PROCEDURE).
No
- Go to 5
5. (K126) ETC MOTOR (-) CIRCUIT SHORTED TO VOLTAGE
Measure the voltage of the (K126) ETC Motor (-) circuit.
Is there any voltage present?
Yes
- Repair the (K126) ETC Motor (-) circuit for a short to voltage.
- Perform the PCM Verification Test Ver. 1 (Refer to 9 - ENGINE - STANDARD PROCEDURE).
No
- Go to 6
6. (K124) ETC MOTOR (+) CIRCUIT SHORTED TO THE (K126) ETC MOTOR (-) CIRCUIT
Turn the ignition off.
Measure the resistance between the (K124) ETC Motor (+) circuit and the (K126) ETC Motor (-) circuit.
Is the resistance below 100 ohms?
Yes
- Repair the short to between the (K124) ETC Motor (+) circuit and the (K126) ETC Motor (-) circuit.
- Perform the PCM Verification Test Ver. 1 (Refer to 9 - ENGINE - STANDARD PROCEDURE).
No
- Go to 7
7. (K124) ETC MOTOR (+) CIRCUIT SHORTED TO GROUND
Measure the resistance between ground and the (K124) ETC Motor (+) circuit.
Is the resistance below 100 ohms?
Yes
- Repair the short to ground in the (K124) ETC Motor (+) circuit.
- Perform the PCM Verification Test Ver. 1 (Refer to 9 - ENGINE - STANDARD PROCEDURE).
No
- Go to 8
8. (K126) ETC MOTOR (-) CIRCUIT SHORTED TO GROUND
Measure the resistance between ground and the (K126) ETC Motor (-) circuit.
Is the resistance below 100 ohms?
Yes
- Repair the short to ground in the (K126) ETC Motor (-) circuit.
- Perform the PCM Verification Test Ver. 1 (Refer to 9 - ENGINE - STANDARD PROCEDURE).
No
- Go to 9
9. (K126) ETC MOTOR (-) CIRCUIT OPEN OR HIGH RESISTANCE
Measure the resistance of the (K126) ETC Motor (-) circuit.
Is the resistance below 5.0 ohms?
Yes
- Go to 10
No
- Repair the (K126) ETC Motor (-) circuit for an open circuit or high resistance.
- Perform the PCM Verification Test Ver. 1 (Refer to 9 - ENGINE - STANDARD PROCEDURE).
10. (K124) ETC MOTOR (+) CIRCUIT OPEN OR HIGH RESISTANCE
Measure the resistance of the (K124) ETC Motor (+) circuit.
Is the resistance below 5.0 ohms?
Yes
- Go to 11
No
- Repair the (K124) ETC Motor (+) circuit for an open circuit or high resistance.
- Perform the PCM Verification Test Ver. 1 (Refer to 9 - ENGINE - STANDARD PROCEDURE).
11. POWERTRAIN CONTROL MODULE (PCM)
Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Throttle Body and the Powertrain Control Module (PCM).
Look for any chafed, pierced, pinched, or partially broken wires.
Look for broken, bent, pushed out or corroded terminals.
Refer to any Technical Service Bulletins that may apply.
Were any problems found?
Yes
- Repair as necessary.
- Perform the PCM Verification Test Ver. 1 (Refer to 9 - ENGINE - STANDARD PROCEDURE).
No
- Replace and program the Powertrain Control Module per Service Information.
- Perform the PCM Verification Test Ver. 1 (Refer to 9 - ENGINE - STANDARD PROCEDURE).