DTC P0103: MAF Sensor Circuit High Voltage

NOTE:  Before you troubleshoot, review the general troubleshooting information - Refer to: How to Troubleshoot the Fuel and Emissions SystemsHow to Troubleshoot the CVT System(CVT System) .

DTC (PGM-FI)

• 1. Problem verification:

  - 1. Turn the vehicle to the ON mode, and wait 2 seconds.

  - 2. Check the parameter(s) below with the HDS.

  Signal	Threshold		Current conditions
  	Values	Unit	Values	Unit
  MAF SENSOR	More than 4.89	V

  Do the current condition(s) match the threshold?

  YES 

  The failure is duplicated. Go to step 2.

  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 PCM. If the freeze data/on-board snapshot of this DTC is recorded, try to reproduce the failure under the same conditions with the freeze data/on-board snapshot.

• 2. Open wire check (VGM line):

  - 1. Turn the vehicle to the OFF (LOCK) mode.

  - 2. Jump the SCS line with the HDS, and wait more than 1 minute.

  - 3. Disconnect the following connectors.

  MAF sensor/IAT sensor 5P connector

  PCM connector B (51P)

  - 4. Check for continuity between test points 1 and 2.

  Test condition	Vehicle OFF (LOCK) mode
  	MAF sensor/IAT sensor 5P connector: disconnected
  	PCM connector B (51P): disconnected
  Test point 1	MAF sensor/IAT sensor 5P connector No. 4
  Test point 2	PCM connector B (51P) No. 33

  Courtesy of HONDA, U.S.A., INC.

  Is there continuity?

  YES 

  The VGM wire is OK. Go to step 3.

  NO 

  Repair an open in the VGM wire between the PCM (B33) and the MAF sensor/IAT sensor.

• 3. PCM internal circuit check:

  - 1. Reconnect the following connector.

  PCM connector B (51P)

  - 2. Connect terminals A and B with a jumper wire.

  Terminal A	MAF sensor/IAT sensor 5P connector No. 4
  Terminal B	MAF sensor/IAT sensor 5P connector No. 5

  Courtesy of HONDA, U.S.A., INC.

  - 3. Turn the vehicle to the ON mode.

  - 4. Clear the DTC with the HDS.

  - 5. Check for Pending or Confirmed DTCs with the HDS.

  DTC Description	Confirmed DTC	Pending DTC	Freeze Frame
  P0103 MAF Sensor Circuit High Voltage

  Is DTC P0103 indicated?

  YES 

  Update the PCM if it does not have the latest software, or substitute a known-good PCM , then recheck. If DTC P0103 goes away and the PCM was updated, troubleshooting is complete. If DTC P0103 goes away and the PCM was substituted, replace the original PCM .

  NO 

  The PCM internal circuit is OK. Replace the MAF sensor/IAT sensor .