DTC P0100 (1.5 L Engine)

DTC P0100  : MAF Sensor Circuit Malfunction

NOTE:  Before you troubleshoot, review the general troubleshooting information .

DTC (PGM-FI)

1. Problem verification

   -1. Turn the vehicle to the ON mode.

   -2. Clear the DTC with the HDS.

   -3. Wait 2 seconds or more.

   -4. Check for Pending or Confirmed DTCs with the HDS.

   DTC Description	Confirmed DTC	Pending DTC
   P0100 MAF Sensor Circuit Malfunction

   Is DTC P0100 indicated?

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

2. Determine possible failure area (FGP line, others)

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

   -2. Disconnect the following connector.

   MAF sensor/IAT sensor 1 4P connector

   -3. Turn the vehicle to the ON mode.

   -4. Measure the voltage between test points 1 and 2.

   Test condition	Vehicle ON mode
   	MAF sensor/IAT sensor 1 4P connector: disconnected
   Test point 1	MAF sensor/IAT sensor 1 4P connector (female terminals) No. 2:
   Test point 2	MAF sensor/IAT sensor 1 4P connector (female terminals) No. 3:

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

   Is there about 5.0 V?

   YES 

   Go to step 6.

   NO 

   Go to step 3.

3. Shorted wire check (VCC2 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 connector.

   PCM connector E (80P)

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

   Test condition	Vehicle OFF (LOCK) mode
   	MAF sensor/IAT sensor 1 4P connector: disconnected
   	PCM connector E (80P): disconnected
   Test point 1	MAF sensor/IAT sensor 1 4P connector (female terminals) No. 3:
   Test point 2	Body ground

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

   Is there continuity?

   YES 

   Repair a short in the VCC2 wire between the PCM (E77) and the MAF sensor/IAT sensor 1.

   NO 

   The VCC2 wire is not shorted. Go to step 4.

4. Open wire check (VCC2 line)

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

   Test condition	Vehicle OFF (LOCK) mode
   	MAF sensor/IAT sensor 1 4P connector: disconnected
   	PCM connector E (80P): disconnected
   Test point 1	MAF sensor/IAT sensor 1 4P connector (female terminals) No. 3:
   Test point 2	PCM connector E (80P) No. 77

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

   Is there continuity?

   YES 

   The VCC2 wire is OK. Go to step 5.

   NO 

   Repair an open in the VCC2 wire between the PCM (E77) and the MAF sensor/IAT sensor 1.

5. Open wire check (SG2 line)

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

   Test condition	Vehicle OFF (LOCK) mode
   	MAF sensor/IAT sensor 1 4P connector: disconnected
   	PCM connector E (80P): disconnected
   Test point 1	MAF sensor/IAT sensor 1 4P connector (female terminals) No. 2:
   Test point 2	PCM connector E (80P) No. 78

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

   Is there continuity?

   YES 

   The SG2 wire is OK. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting, or substitute a known-good PCM .

   NO 

   Repair an open in the SG2 wire between the PCM (E78) and the MAF sensor/IAT sensor 1.

6. Shorted wire check (FGP 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 connector.

   PCM connector E (80P)

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

   Test condition	Vehicle OFF (LOCK) mode
   	MAF sensor/IAT sensor 1 4P connector: disconnected
   	PCM connector E (80P): disconnected
   Test point 1	MAF sensor/IAT sensor 1 4P connector (female terminals) No. 1:
   Test point 2	Body ground

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

   Is there continuity?

   YES 

   Repair a short in the FGP wire between the PCM (E61) and the MAF sensor/IAT sensor 1.

   NO 

   The FGP wire is not shorted to ground. Go to step 7.

7. Open wire check (FGP line)

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

   Test condition	Vehicle OFF (LOCK) mode
   	MAF sensor/IAT sensor 1 4P connector: disconnected
   	PCM connector E (80P): disconnected
   Test point 1	MAF sensor/IAT sensor 1 4P connector (female terminals) No. 1:
   Test point 2	PCM connector E (80P) No. 61

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

   Is there continuity?

   YES 

   The FGP wire is not open. Go to step 8.

   NO 

   Repair an open in the FGP wire between the PCM (E61) and the MAF sensor/IAT sensor 1.

8. Shorted wire check (FGP line to power)

   -1. Turn the vehicle to the ON mode.

   -2. Measure the voltage between test points 1 and 2.

   Test condition	Vehicle ON mode
   	MAF sensor/IAT sensor 1 4P connector: disconnected
   	PCM connector E (80P): disconnected
   Test point 1	MAF sensor/IAT sensor 1 4P connector (female terminals) No. 1:
   Test point 2	Body ground

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

   Is there any voltage?

   YES 

   Repair a short to power in the FGP wire between the PCM (E61) and the MAF sensor/IAT sensor 1.

   NO 

   The FGP wire is OK. Go to step 9.

9. MAF sensor/IAT sensor 1 check

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

   -2. Substitute a known-good MAF sensor/IAT sensor 1 .

   -3. Reconnect all connectors.

   -4. Exit the SCS mode with the HDS.

   -5. Turn the vehicle to the ON mode.

   -6. Clear the DTC with the HDS.

   -7. Wait 2 seconds or more.

   -8. Check for Pending or Confirmed DTCs with the HDS.

   DTC Description	Confirmed DTC	Pending DTC
   P0100 MAF Sensor Circuit Malfunction

   Is DTC P0100 indicated?

   YES 

   The MAF sensor/IAT sensor 1 is OK. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting, or substitute a known-good PCM .

   NO 

   Replace the original MAF sensor/IAT sensor 1 .