DTC P0193

DTC P0193  : Fuel Rail Pressure Sensor Circuit High Voltage

DTC (PGM-FI)

1. Problem verification

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

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

   Signal	Threshold		Current conditions
   	Values	Unit	Values	Unit
   INPUT VOLTAGE FROM PF 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 fuel rail pressure sensor and the PCM.

2. Determine possible failure area (PF sensor, others)

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

   -2. Disconnect the following connector.

   Fuel rail pressure sensor 3P connector

   -3. Connect terminals A and B with a jumper wire.

   Terminal A	Fuel rail pressure sensor 3P connector No. 1 (WHT)
   Terminal B	Fuel rail pressure sensor 3P connector No. 2 (BLU)

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

   -4. Turn the vehicle to the ON mode.

   -5. Check the parameter(s) below with the HDS.

   Signal	Threshold		Current conditions
   	Values	Unit	Values	Unit
   INPUT VOLTAGE FROM PF SENSOR	More than 4.89	V

   Do the current condition(s) match the threshold?

   YES 

   Go to step 3.

   NO 

   Replace the fuel rail , then do the repair verification.

3. Determine possible failure area (PF line, SG1 line)

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

   -2. Remove the jumper wire from the fuel rail pressure sensor 3P connector.

   -3. Turn the vehicle to the ON mode.

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

   Test condition	Vehicle ON mode
   	Fuel rail pressure sensor 3P connector: disconnected
   Test circuit	PF, SG1
   Test point 1	Fuel rail pressure sensor 3P connector No. 2 (BLU)
   Test point 2	Fuel rail pressure sensor 3P connector No. 3 (PNK)

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

   Is there about 5.0 V?

   YES 

   SG1 wire is OK. Go to step 4.

   NO 

   Go to step 5.

4. Open wire check (PF line)

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

   -2. Jump the SCS line with the HDS

   -3. Disconnect the following connector.

   PCM connector B (51P)

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

   Test condition	Vehicle OFF (LOCK) mode
   	Fuel rail pressure sensor 3P connector: disconnected
   	PCM connector B (51P): disconnected
   Test circuit	PF
   Test point 1	Fuel rail pressure sensor 3P connector No. 1 (WHT)
   Test point 2	PCM connector B (51P) No. 35 (WHT)

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

   Is there continuity?

   YES 

   The PF wire is OK. Update the PCM if it does not have the latest software, or substitute a known-good PCM , then do the repair verification.

   NO 

   Repair an open in the PF wire between the PCM (B35) and the fuel rail pressure sensor, then do the repair verification.

5. Open wire check (SG1 line)

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

   -2. Jump the SCS line with the HDS.

   -3. Disconnect the following connector.

   PCM connector C (51P)

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

   Test condition	Vehicle OFF (LOCK) mode
   	Fuel rail pressure sensor 3P connector: disconnected
   	PCM connector C (51P): disconnected
   Test circuit	SG1
   Test point 1	Fuel rail pressure sensor 3P connector No. 2 (BLU)
   Test point 2	PCM connector C (51P) No. 33 (BLU)

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

   Is there continuity?

   YES 

   The SG1 wire is OK. Update the PCM if it does not have the latest software, or substitute a known-good PCM , then do the repair verification.

   NO 

   Repair an open in the SG1 wire between the PCM (C33) and the fuel rail pressure sensor, then do the repair verification.

6. Repair verification

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

   -2. Reconnect all connectors.

   -3. Exit the SCS mode with the HDS.

   -4. Turn the vehicle to the ON mode.

   -5. Reset the PCM with the HDS .

   Reset PCM

   -6. Do the PCM idle learn procedure .

   -7. Check for Pending or Confirmed DTCs with the HDS.

   DTC Description	Confirmed DTC	Pending DTC	Freeze Frame
   P0193 Fuel Rail Pressure Sensor Circuit High Voltage

   DTC (PGM-FI)

   Is DTC P0193 indicated?

   YES 

   Check for poor connections or loose terminals at the fuel rail pressure sensor and the PCM. If the PCM was updated, substitute a known-good PCM , then recheck. If the PCM was substituted, go to step 1.

   NO 

   Troubleshooting is complete. If the PCM was substituted, replace the original PCM . If any other Pending or Confirmed DTCs are indicated, go to the indicated DTC's troubleshooting.