DTC Troubleshooting: P0103 (50)
DTC P0103:
 MAF Sensor Circuit High Input
NOTE: Before you troubleshoot, record all freeze data and review the general troubleshooting information.
  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, the system is OK at this time. Check for poor connections or loose terminals at the MAF sensor/IAT sensor 1 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 2 minutes.
  1. Disconnect the MAF sensor/IAT sensor 1 5P connector.
  1. At sensor side, measure resistance between MAF sensor/IAT sensor 1 5P connector terminals No. 1 and No. 4.
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 sensor/IAT sensor 1 5P connector terminal No. 4 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 sensor/IAT sensor 1 and ECM connector No. 1 terminal No. 69, then go to Step 12 .
  1. Turn the ignition switch OFF.
  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.
Is DTC P0103 indicated?
YES -
Check for poor connections or loose terminals at the MAF sensor/IAT sensor 1 and the ECM, then go to Step 1 .
NO -
Troubleshooting is complete. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.■
  1. Reconnect all connectors.
  1. Start the engine.
  1. Check for Temporary DTCs or DTCs with the HDS.
Is DTC P0103 indicated?
YES -
Check for poor connections or loose terminals at the MAF sensor/IAT sensor 1 and the ECM. If the ECM was updated, substitute a known-good ECM, then go to Step 18 . If the ECM was substituted, go to Step 1 .
NO -
If the ECM was updated, troubleshooting is complete. If the ECM was substituted, replace the original ECM. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.■