DTC Troubleshooting: P1249 (40)

DTC P1249:  ETCS Learn Deviation

NOTE: If the DTCs listed below are stored at the same time as DTC P1249, troubleshoot those DTCs first, then recheck for P1249.
P0221, P0222, P0223: Throttle position (TP) sensor B
P0607: ECM internal control module malfunction
P0638: Throttle actuator control range/performance problem
P1683: Throttle valve neutral position malfunction

1.Turn the ignition switch ON (II).

2.Do the DTC CLEAR in the CLEAR MENU with the HDS.

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

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

Is DTC P1249 indicated?


YES - Go to 5.


NO - Intermittent failure, system is OK at this time.Check for poor connections or loose terminals at the throttle body and at the ECM.n


5.Check for the freeze data with the HDS.

Is there battery voltage 10 V or less?


YES - Check for the battery, then go to 12.


NO - Go to 6.


6.Check for the freeze data with the HDS.

Is there vehicle speed 0 km/h?


YES - Go to 7.


NO - Stop the vehicle, then go to 12.

7.Check for the freeze data with the HDS.

Is there ENGINE SPD 250 rpm (min-1) or less?


YES - Go to 8.


NO - Stop the engine, then go to 12.


8.Check for the freeze data with the HDS.

Is there ECT SENSOR 100.5°C (213°F) or less?


YES - Go to 9.


NO - Cool down the engine, then go to 12.


9.Check for the freeze data with the HDS.

Is there ECT SENSOR 2.25°C (36°F) or higher?


YES - Go to 10.


NO - Warm up the engine, then go to 12.


10.Check for the freeze data with the HDS.

Is there IAT SENSOR 2.25°C (36°F) or higher?


YES - Go to 11.


NO - Warm up the engine, then go to 12.


11.Check for the freeze data with the HDS.

Is there APP SENSOR A/B 14.90 % or less?


YES - Go to 16.


NO - Release the accelerator pedal, then go to 12.

12.Turn the ignition switch ON (II).

13.Do the ECM RESET in the CLEAR MENU with the HDS.

14.Do the ETCS learn procedure.

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

Is DTC P1249 indicated?


YES - If DTC P1249 is indicated, go to 5, and recheck. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC troubleshooting.


NO - Troubleshooting is complete.n


16.Substitute a known-good ECM.

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

Are any Temporary DTCs or DTCs indicated?


YES - If DTC P1249 is indicated, go to 5, and recheck. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC troubleshooting.


NO - Replace the original ECM.n