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. 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. 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 .

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) - Refer to: How to Troubleshoot the Brake Booster Pressure Monitoring System (2016 2017 2018 2019 2020), or How to Troubleshoot the Fuel and Emissions Systems(With Auto Idle Stop System) (2016), or How to Troubleshoot the Fuel and Emissions Systems, or How to Troubleshoot the A/T System (2014 2015)

   - 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 - Refer to: PCM Removal and Installation (2014 2015), or PCM Removal and Installation (2016) .

   NO 

   Repair an open in the SG2 wire between the rocker arm oil pressure sensor and the PCM (B45).

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) - Refer to: How to Troubleshoot the Fuel and Emissions Systems, or How to Troubleshoot the Brake Booster Pressure Monitoring System (2016 2017 2018 2019 2020), or How to Troubleshoot the Fuel and Emissions Systems(With Auto Idle Stop System) (2016), or How to Troubleshoot the A/T System (2014 2015)

   - 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 - Refer to: PCM Removal and Installation (2014 2015), or PCM Removal and Installation (2016) .

   NO 

   Repair an open in the OP SENSOR wire between the rocker arm oil pressure sensor and the PCM (B47).