P1112

P1112-ELECTRONIC THROTTLE CONTROL - UNABLE TO OPEN - BANK 2

For a complete wiring diagram refer to the Wiring Information Electrical Diagrams.

- When Monitored:
During an End-of-Line throttle learn, service ETC Relearn and Spring test.

- Set Condition:
When the PCM detects a failure of throttle body 2's plate to return to within a calibratable tolerance of its default position. Fault set when the throttle plate's actual default position is less than the expected default position. One trip fault. Three good trips to turn off the MIL.





Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Pre-Diagnostic Troubleshooting Procedure.

1. ACTIVE DTC

NOTE: The PCM tests the ETC Motor by opening and closing the Throttle Plate before starting the engine. If during this test the Throttle plate does not return to the closed position this DTC sets.

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.

1. Ignition on, engine not running.
2. With a scan tool, select View DTCs.

Is the DTC Active at this time?

Yes

- Go To 2

No

- Refer to the INTERMITTENT CONDITION Diagnostic Procedure. Checking for an Intermittent DTC.

2. THROTTLE PLATE STUCK CLOSED

NOTE: The PCM tests the ETC Motor by opening and closing the Throttle Plate before starting the engine. If during this test the Throttle plate does not return to the closed position this DTC sets.

1. Turn the ignition off.
2. Remove the Air Cleaner Assembly from the Throttle Body.
3. Check for any signs of a foreign material causing the Throttle to remain closed.
4. Using a scan tool, under System Tests, perform the ETC Throttle Follower Test.
5. Have an assistant watch the throttle plate to verify it moves during the test.

Does the Throttle Plate move?

Yes

- 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 PCM Verification Test. PCM Verification Test.

No

- Go To 3

3. ETC OPERATION
1. Ignition on, engine not running.
2. With a scan tool, perform the ETC Throttle Follower Test.

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

3. 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

- Refer to the INTERMITTENT CONDITION Diagnostic Procedure. Checking for an Intermittent DTC

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 PCM Verification Test. PCM Verification Test.