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).

1. Clear the DTC with the HDS.

1. Turn the ignition switch OFF.

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

1. Check for Temporary DTCs or DTCs in the DTCs MENU with the HDS.

Is DTC P2176 indicated?

YES | - | Go to Step 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 clean the throttle body. ■

1. Turn the ignition switch OFF.

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

1. Turn the ignition switch ON (II).

1. Clear the DTC with the HDS.

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

1. Visually check the throttle valve operation.
   NOTE: Be careful not to pinch a finger during your work. Keep your hands away from the throttle valve.

Does the throttle valve more to its full close position?

YES | - | Go to Step 12 .
NO | - | Go to Step 13 .

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

Is there sludge or carbon on the throttle valve?

YES | - | Do the throttle body cleaning, then go to Step 22 and recheck.
NO | - | Go to Step 18 .

1. Turn the ignition switch OFF.

1. Disconnect the throttle body 6P connector.

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

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