| DTC P0103: | MAF Sensor Circuit High Voltage |
| 1. | Turn the ignition switch ON (II), 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 3. NO - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the MAF sensor and the ECM/PCM.n |
| 3. | Turn the ignition switch OFF. |
| 4. | Jump the SCS line with the HDS. |
| 5. | Disconnect the MAF sensor/IAT sensor 5P connector. |
| 6. | Disconnect ECM/PCM connector B (44P). |
| 7. | Check for continuity between MAF sensor/IAT sensor 5P connector terminal No. 4 and ECM/PCM connector terminal B32.
Is there continuity? YES - Go to 8. NO - Repair open in the wire between the ECM/PCM (B32) and the MAF sensor, then go to 15. |
| 8. | Reconnect ECM/PCM connector B (44P). |
| 9. | Connect MAF sensor/IAT sensor 5P connector terminals No. 3 and No. 4 with a jumper wire.
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| 10. | Turn the ignition switch ON (II). |
| 11. | Clear the DTC with the HDS. |
| 12. | Check for Temporary DTCs or DTCs with the HDS. Is DTC P0103 indicated? YES - Go to 20. NO - Go to 13. |
| 13. | Turn the ignition switch OFF. |
| 14. | Replace the MAF sensor/IAT sensor. |
| 15. | Reconnect all connectors. |
| 16. | Turn the ignition switch ON (II). |
| 17. | Reset the ECM/PCM with the HDS. |
| 18. | Do the ECM/PCM idle learn procedure. |
| 19. | Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES - If DTC P0103 is indicated, check for poor connections or loose terminals at the MAF sensor/IAT sensor 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 - Troubleshooting is complete.n |
| 20. | Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM. |
| 21. | Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES - If DTC P0103 is indicated, check for poor connections or loose terminals at the MAF sensor/IAT sensor 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 |