DTC Troubleshooting: P2176 (40) (R18A: M/T)

DTC Troubleshooting: P2176 (40)

DTC P2176:  Throttle Actuator Control System Idle Position Not Learned




Do not insert your fingers into the installed throttle body when you turn the ignition switch ON (II) or while the ignition switch is ON (II). If you do, you will seriously injure your fingers if the throttle valve is activated.



NOTE:

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 the ECM/PCM, then clean the throttle body.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.

Does the throttle valve move to its fully 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 22 and recheck.


NO - Go to 19.


13.Turn the ignition switch OFF.

14.Disconnect the throttle body 6P connector.

15.Jump the SCS line with the HDS.

16.Disconnect ECM/PCM connector C (44P).

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

 

18.Check for continuity between ECM/PCM connector terminals C3 and C4.

 

Is there continuity?


YES - Go to 28.


NO - Repair open in the wires between the throttle body and the ECM/PCM (C3, C4), then go to 21.


19.Turn the ignition switch OFF.

20.Replace the throttle body.

21.Reconnect all connectors.

22.Turn the ignition switch ON (II).

23.Reset the ECM/PCM with the HDS.

24.Do the ECM/PCM idle learn procedure.

25.Turn the ignition switch OFF.

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

27.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 ECM/PCM, then clean the throttle body, and go to 1. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.


NO - Troubleshooting is complete.n


28.Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM.

29.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 ECM/PCM, then go to 1. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.


NO - If the ECM/PCM was updated, troubleshooting is complete. If the ECM/PCM was substituted, replace the original ECM/PCM.n