DTC Troubleshooting: P0103 (50-2)

DTC P0103: MAF Sensor Circuit High Input

1. Turn the ignition switch ON (II).

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

Is about 199 gm/s or 4.90 V or higher indicated?

YES | - | Go to Step 3 .
NO | - | Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the MAF/IAT sensor and the ECM.■

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

Are DTC P0103 and P0113 indicated at same time?

YES | - | Go to Step 4 .
NO | - | Go to Step 11 .

1. Turn the ignition switch OFF, and wait 30 seconds.

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

1. At sensor side, measure resistance between MAF/IAT sensor 5P connector terminals No. 3 and No. 5.

Is there about 0 Ω?

YES | - | Go to Step 10 .
NO | - | Go to Step 7 .

1. Disconnect ECM connector No. 1 (96P).

1. Connect MAF/IAT sensor 5P connector terminal No. 3 to body ground with a jumper wire.

1. Check for continuity between ECM connector No. 1 terminal No. 69 and body ground.

Is there continuity?

YES | - | Go to Step 16 .
NO | - | Repair open in the wire between the MAF/IAT sensor and ECM connector No. 1 terminal No. 69, then go to Step 12 .

1. Turn the ignition switch OFF.

1. Replace the MAF/IAT sensor.

1. Turn the ignition switch ON (II).

1. Reset the ECM with the HDS.

1. Start the engine.

1. 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/IAT sensor and the ECM, then go to Step 1 . If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.
NO | - | Troubleshooting is complete.■

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

1. Start the engine.

1. 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/IAT sensor and the ECM, then go to Step 1 . If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.
NO | - | If the ECM was updated, troubleshooting is complete. If the ECM was substituted, replace the original ECM. ■