DTC Troubleshooting: P2176 (40)

DTC P2176:  Throttle Actuator Control System Idle Position Not Learned

NOTE: If DTC P2135 is stored at the same time as DTC P2176, troubleshoot DTC P2135 first, then recheck for DTC P2176.

1.Turn the ignition switch ON (II).

2.Clear the DTC with the HDS.

3.Turn the ignition switch OFF.

4.Turn the ignition switch ON (II), and wait 10 seconds.

5.Check for Temporary DTCs or DTCs with the HDS.

Is DTC P2176 indicated?


YES - Go to 6.


NO - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the throttle body and at the throttle actuator control module, then do the throttle body cleaning.n


6.Turn the ignition switch OFF.

7.Disconnect the intake air duct from the throttle body.

8.Turn the ignition switch ON (II).

9.Clear the DTC with the HDS.

10.Do the ETCS TEST in the INSPECTION MENU with the HDS.

11.Visually check the throttle valve operation.

NOTE: Be careful not to pinch a finger during work. Keep hands away from the throttle valve.

Does the throttle valve operate to the full closed position?


YES - Go to 12.


NO - Go to 13.

12.Check for sludge or carbon on the throttle valve.

Is there sludge or carbon on the throttle valve?


YES - Clean the throttle body, then go to 21, and recheck.


NO - Go to 19.


13.Turn the ignition switch OFF.

14.Disconnect the throttle body 6P connector.

15.Disconnect the throttle actuator control module 16P connector.

16.Connect the throttle body 6P connector terminals No. 5 and No. 6 with a jumper wire.

 

17.Check for continuity between throttle actuator control module 16P connector terminals No. 1 and No. 8.

 

Is there continuity?


YES - Substitute a known-good throttle actuator control module, then go to 20 and recheck. If DTC P2176 is not indicated, replace the original throttle actuator control module, then go to 20.


NO - Repair open in the wires between the throttle body and the throttle actuator control module (motor drive lines), then go to 20.


18.Turn the ignition switch OFF.

19.Replace the throttle body.

20.Reconnect all connectors.

21.Turn the ignition switch ON (II).

22.Reset the ECM/PCM with the HDS.

23.Do the ECM/PCM idle learn procedure.

24.Turn the ignition switch OFF.

25.Turn the ignition switch ON (II), and wait 10 seconds.

26.Check for Temporary DTCs or DTCs with the HDS.

Are any Temporary DTCs or DTCs indicated?


YES - If DTC P2176 is indicated, check for poor connections or loose terminals at the throttle body and the throttle actuator control module, then do the throttle body cleaning, then go to 1. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.


NO - Troubleshooting is complete.n