DTC P0523

DTC P0523  : Rocker Arm Oil Pressure Sensor Circuit High Voltage

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	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 rocker arm oil pressure sensor and the PCM.

2. Determine possible failure area (rocker arm oil pressure sensor, others)

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

   -2. Disconnect the following connector.

   Rocker arm oil pressure sensor 3P connector

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

   Terminal A	Rocker arm oil pressure sensor 3P connector No. 1 (GRY)
   Terminal B	Rocker arm oil pressure sensor 3P connector No. 2 (PUR)

   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	More than 4.79	V

   Do the current condition(s) match the threshold?

   YES 

   Go to step 3.

   NO 

   Replace the rocker arm oil pressure sensor , then do the repair verification.

3. Determine possible failure area (OP SENSOR line, VCC2 line)

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

   -2. Remove the jumper wire from the rocker arm 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
   	Rocker arm oil pressure sensor 3P connector: disconnected
   Test circuit	SG2, VCC2
   Test point 1	Rocker arm oil pressure sensor 3P connector No. 1 (GRY)
   Test point 2	Rocker arm oil pressure sensor 3P connector No. 3 (GRN)

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

   Is there about 5.0 V?

   YES 

   Go to step 5.

   NO 

   Go to step 4.

4. Open wire check (SG2 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
   	Rocker arm oil pressure sensor 3P connector: disconnected
   	PCM connector B (51P): disconnected
   Test circuit	SG2
   Test point 1	Rocker arm oil pressure sensor 3P connector No. 1 (GRY)
   Test point 2	PCM connector B (51P) No. 45 (GRY)

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

   Is there continuity?

   YES 

   The SG2 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 SG2 wire between the rocker arm oil pressure sensor and the PCM (B45), then do the repair verification.

5. Open wire check (OP SENSOR 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
   	Rocker arm oil pressure sensor 3P connector: disconnected
   	PCM connector B (51P): disconnected
   Test circuit	OP SENSOR
   Test point 1	Rocker arm oil pressure sensor 3P connector No. 2 (PUR)
   Test point 2	PCM connector B (51P) No. 47 (PUR)

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

   Is there continuity?

   YES 

   The OP SENSOR 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 OP SENSOR wire between the rocker arm oil pressure sensor and the PCM (B47), then do the repair verification.

6. Repair verification (OBD STATUS check)

   -1. Reconnect all connectors.

   -2. Exit the SCS mode with the HDS.

   -3. Turn the vehicle to the ON mode.

   -4. Reset the PCM with the HDS .

   Reset PCM

   -5. Do the PCM idle learn procedure .

   -6. Monitor the OBD STATUS for DTC P0523 in the DTCs MENU with the HDS.

   DTC Description	OBD STATUS
   P0523 Rocker Arm Oil Pressure Sensor Circuit High Voltage

   DTC (PGM-FI)

   Does the HDS indicate PASSED, FAILED, or NOT COMPLETED?

   PASSED

   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.

   FAILED

   Go to step 1 and recheck. If the PCM was updated, substitute a known-good PCM , then check the OBD STATUS again.

   NOT COMPLETED

   Keep idling until a result comes on.