P0103

DTC Troubleshooting: P0103, P0103

DTC P0103:

MAF Sensor Circuit High Voltage

NOTE: Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information Initial Inspection and Diagnostic Overview.

1. Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode, and wait 2 seconds.

2. Check the MAF SENSOR in the DATA LIST with the HDS.

Is about 202 gm/s, or 4.89 V or more indicated?

YES -

Go to step 3.

NO -

Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the MAF sensor/IAT sensor and the ECM/PCM.�

3. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.

4. Jump the SCS line with the HDS.

5. Disconnect the MAF sensor/IAT sensor 5P connector.

6. Disconnect ECM/PCM connector A (49P).

7. Check for continuity between MAF sensor/IAT sensor 5P connector terminal No. 4 and ECM/PCM connector terminal A9.





Is there continuity?

YES -

Go to step 8.

NO -

Repair open in the wire between the ECM/PCM (A9) and the MAF sensor/IAT sensor, then go to step 15.

8. Reconnect ECM/PCM connector A (49P).

9. Connect MAF sensor/IAT sensor 5P connector terminals No. 3 and No. 4 with a jumper wire.






10. Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.

11. Clear the DTC with the HDS.

12. Check for Pending or Confirmed DTCs with the HDS.

Is DTC P0103 indicated?

YES -

Go to step 20.

NO -

Go to step 13.

13. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.

14. Replace the MAF sensor/IAT sensor Service and Repair.

15. Reconnect all connectors.

16. Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.

17. Reset the ECM/PCM with the HDS.

18. Do the ECM/PCM idle learn procedure ECM/PCM Idle Learn Procedure.

19. Check for Pending or Confirmed DTCs with the HDS.

Is DTC P0103 indicated?

YES -

Check for poor connections or loose terminals at the MAF sensor/IAT sensor and the ECM/PCM, then go to step 1.

NO -

Troubleshooting is complete. If any other Pending or Confirmed DTCs are indicated, go to the indicated DTC's troubleshooting.�

20. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.

21. Reconnect all connectors.

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

23. Check for Pending or Confirmed DTCs with the HDS.

Is DTC P0103 indicated?

YES -

Check for poor connections or loose terminals at the MAF sensor/IAT sensor and the ECM/PCM. If the ECM/PCM was updated, substitute a known-good ECM/PCM, then recheck. If the ECM/PCM was substituted, go to step 1.

NO -

If the ECM/PCM was updated, troubleshooting is complete. If the ECM/PCM was substituted, replace the original ECM/PCM Service and Repair. If any other Pending or Confirmed DTCs are indicated, go to the indicated DTC's troubleshooting.�