DTC P0523

DTC P0523  : Engine Oil Pressure Sensor Circuit High Voltage

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

DTC (PGM-FI)

1. Problem verification

   -1. Turn the vehicle to the ON mode.

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

   Signal	Malfunction Threshold		Current conditions
   	Values	Unit	Values	Unit
   Rocker Arm Oil Pressure Sensor Voltage	More than 4.79	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 engine oil pressure sensor 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 (engine oil pressure sensor, others)

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

   -2. Disconnect the following connector.

   Engine oil pressure sensor 3P connector

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

   Terminal A	Engine oil pressure sensor 3P connector (female terminals) No. 1:
   Terminal B	Engine oil pressure sensor 3P connector (female terminals) No. 2:

   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	Malfunction Threshold		Current conditions
   	Values	Unit	Values	Unit
   Rocker Arm Oil Pressure Sensor Voltage	More than 4.79	V

   Do the current condition(s) match the threshold?

   YES 

   Go to step 3.

   NO 

   Replace the engine oil pressure sensor .

3. Determine possible failure area (SG2 line, others)

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

   -2. Remove the jumper wire from the engine oil 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
   	Engine oil pressure sensor 3P connector: disconnected
   Test point 1	Engine oil pressure sensor 3P connector (female terminals) No. 1:
   Test point 2	Engine oil pressure sensor 3P connector (female terminals) No. 3:

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

   Is there about 5.0 V?

   YES 

   Go to step 4.

   NO 

   Go to step 5.

4. Open wire check (OPSEN 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. Measure the resistance between test points 1 and 2.

   Test condition	Vehicle OFF (LOCK) mode
   	Engine oil pressure sensor 3P connector: disconnected
   	PCM connector E (80P): disconnected
   Test point 1	Engine oil pressure sensor 3P connector (female terminals) No. 2:
   Test point 2	PCM connector E (80P) No. 58

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

   Is there 1.0 Ω or less?

   YES 

   The OPSEN 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 OPSEN wire between the PCM (E58) and the engine oil pressure sensor.

5. Open wire check (SG2 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. Measure the resistance between test points 1 and 2.

   Test condition	Vehicle OFF (LOCK) mode
   	Engine oil pressure sensor 3P connector: disconnected
   	PCM connector E (80P): disconnected
   Test point 1	Engine oil pressure sensor 3P connector (female terminals) No. 1:
   Test point 2	PCM connector E (80P) No. 78

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

   Is there 1.0 Ω or less?

   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 engine oil pressure sensor.