DTC P0563

DTC P0563  : PCM Power Source Circuit Unexpected Voltage

DTC (PGM-FI)

1. Problem verification

   -1. Turn the vehicle to the ON mode.

   - 2. Clear the DTC with the HDS.

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

   - 4. Wait 10 seconds.

   - 5. Turn the vehicle to the ON mode.

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

   DTC Description	Confirmed DTC	Pending DTC	Freeze Frame
   P0563 PCM Power Source Circuit Unexpected Voltage

   Is DTC P0563 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 PGM-FI main relay 1 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 (IGP line, others)

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

   - 2. Jump the SCS line with the HDS.

   - 3. Disconnect the following connector.

   PCM connector A (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. Measure the voltage between test points 1 and 2.

   Test condition	Vehicle OFF (LOCK) mode
   	PCM connector A (51P): disconnected
   Test circuit	MRLY
   Test point 1	PCM connector A (51P) No. 7 (RED)
   Test point 2	Body ground

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

   Is there battery voltage?

   YES 

   Go to step 4.

   NO 

   Go to step 3.

3. Shorted wire check (MRLY line)

   -1. Remove PGM-FI main relay 1 (A) from the under-hood fuse/relay box.

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

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

   Test condition	Vehicle OFF (LOCK) mode
   	PCM connector A (51P): disconnected
   	PGM-FI main relay 1: disconnected
   Test circuit	MRLY
   Test point 1	PCM connector A (51P) No. 7 (RED)
   Test point 2	Body ground

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

   Is there continuity?

   YES 

   Repair a short in the MRLY wire between the PCM (A7) and PGM-FI main relay 1.

   NO 

   The MRLY wire is OK. Go to step 5.

4. Shorted wire check (IGP line to power)

   -1. 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 A/T System (2014 2015), or How to Troubleshoot the Fuel and Emissions Systems

   - 2. Remove PGM-FI main relay 1 (A) from the under-hood fuse/relay box.

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

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

   Test condition	Vehicle OFF (LOCK) mode
   	PCM connector A (51P): disconnected
   	PCM connector B (51P): disconnected
   	PGM-FI main relay 1: disconnected
   Test circuit	IGP
   Test point 1	PCM connector B (51P) No. 10 (YEL)
   Test point 2	Body ground

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

   Is there battery voltage?

   YES 

   Repair a short to power in the IGP wire between the PCM (B10) and PGM-FI main relay 1.

   NO 

   The IGP wire is OK. Go to step 5.

5. Relay check

   -1. Test PGM-FI main relay 1.

   Is PGM-FI main relay 1 OK?

   YES 

   PGM-FI main relay 1 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 (2016), or PCM Removal and Installation (2014 2015) .

   NO 

   Replace PGM-FI main relay 1.